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๐ Math Calculators
Percentage Calculator
Figure out percentages in seconds - discounts, tips, grades, you name it. What
Use Tool โUnit Converter
Free online Unit Converter. Instantly convert Length (m, ft, in), Weight (kg, lb), Temperature (C, F), and Volume. Accurate and easy to use.
Use Tool โFraction Calculator
Free fraction calculator - add, subtract, multiply, divide fractions instantly. Got 1/4 + 1/2? That
Use Tool โArea Calculator
Free area calculator for all shapes: circle, triangle, rectangle, square, trapezoid. Easy to use, instant results. Perfect for math homework and DIY projects.
Use Tool โQuadratic Equation Solver
Stuck on axยฒ + bx + c = 0? Enter your numbers, get both roots instantly. Handles real roots, complex numbers, and shows the discriminant. Free quadratic formula calculator.
Use Tool โTriangle Calculator
Free triangle calculator. Calculate area, perimeter, and identify triangle type (Equilateral, Isosceles, Scalene, Right) given three sides.
Use Tool โDistance Calculator
Free distance calculator. Calculate the distance between two points (x1, y1) and (x2, y2) using the distance formula. Step-by-step explanation included.
Use Tool โSlope Calculator
Free slope calculator to find the slope (m) of a line passing through two points. Step-by-step formula explanations. Perfect for algebra and geometry homework.
Use Tool โPrime Number Checker
Free online Prime Number Checker. Instantly test if any number is prime. Reviewed by experts. Includes list of primes, definition, and step-by-step guide.
Use Tool โLCM Calculator
Free LCM calculator. Find the Least Common Multiple of two numbers. Perfect for adding fractions and solving math problems.
Use Tool โFactorial Calculator
Free factorial calculator. Calculate n! for any non-negative integer. Understand factorials with examples and explanations.
Use Tool โSquare Root Calculator
Free square root calculator to find the principal square root of any number. Learn about perfect squares, irrational numbers, and how to estimate roots.
Use Tool โPercentage Change
Calculate % increase or decrease between two numbers. Perfect for tracking sales growth, weight loss, or price changes. Instant & Free.
Use Tool โScientific Notation
Free scientific notation converter. Instantly convert decimal numbers to scientific notation (standard form) and vice versa. Perfect for chemistry and physics.
Use Tool โStandard Deviation Calculator
Paste your numbers, get the Standard Deviation (ฯ) instantly. Calculates Mean, Variance, and Population vs Sample SD. Free statistics tool for students.
Use Tool โMean, Median, Mode Calculator
Free mean, median, mode calculator. Calculate average, middle value, and most frequent number in your dataset. Perfect for statistics.
Use Tool โSphere Calculator
Free sphere calculator. Instantly calculate volume and surface area from radius. Includes formulas, step-by-step examples, and expert tips. No signup required.
Use Tool โCylinder Calculator
Free cylinder calculator. Calculate volume, surface area, and lateral area of a cylinder. Learn the formulas for cylinder geometry.
Use Tool โCone Calculator
Free cone calculator. Calculate volume, surface area, and slant height of a right circular cone. Learn the formulas for cone geometry.
Use Tool โMatrix Calculator
Free online Matrix Calculator for 2x2 matrices. Perform addition, subtraction, and multiplication instantly. Reviewed by experts. Includes step-by-step guide and tips.
Use Tool โFibonacci Sequence
Free Fibonacci sequence generator. Calculate Fibonacci numbers instantly. Learn about the golden ratio and Fibonacci pattern.
Use Tool โLogarithm Calculator
Free logarithm calculator. Calculate log with any base (logโโ, ln, logโ). Includes natural log and common log functions.
Use Tool โAntilog Calculator
Free antilog calculator. Calculate the inverse logarithm (antilog) of any number with any base. Understand the relationship between logs and exponents.
Use Tool โGCD Calculator
Free GCD calculator. Find the Greatest Common Divisor (GCD) or Highest Common Factor (HCF) of two numbers using Euclidean algorithm.
Use Tool โCube Root Calculator
Free cube root calculator to find the cube root of any number. Learn about perfect cubes, negative roots, and how to solve cubic equations.
Use Tool โBinary Calculator
Free binary calculator - add, subtract, multiply, divide binary numbers. Need to calculate 1010 + 1101? Result: 10111. Perfect for programmers and CS students.
Use Tool โSignificant Figures Calculator
Free significant figures calculator. Count sig figs, round numbers to specific significant digits, and learn the rules of precision for chemistry and physics.
Use Tool โRounding Calculator
Free online rounding calculator. Instantly round numbers to nearest whole, decimal, tens, hundreds, or thousands. Supports standard rounding, floor & ceiling. Expert reviewed.
Use Tool โPermutation Calculator (nPr)
Free online Permutation Calculator (nPr). Calculate the number of ordered arrangements instantly. Reviewed by experts. Includes formula, examples, and step-by-step guide.
Use Tool โCombination Calculator (nCr)
Free combination calculator (nCr). Calculate the number of ways to choose r items from a set of n items without regard to order. Perfect for statistics and probability.
Use Tool โ๐ฐ Finance Calculators
1099 vs W-2 Calculator
Compare 1099 contractor vs W-2 employee take-home pay. Free tool calculates taxes, benefits, flexibility trade-offs.
Use Tool โProperty Management Fee Calculator
Calculate property management fees vs self-managing. Free tool compares 8-12% PM costs, tenant placement fees, and DIY time investment.
Use Tool โ1031 Exchange Tax Calculator
Calculate tax savings from a 1031 like-kind exchange. Free tool estimates capital gains deferral, replacement property requirements, and IRS timelines.
Use Tool โFreelance Rate Calculator
Calculate your freelance hourly rate based on desired salary, billable hours, taxes, and expenses. Free tool for consultants, designers, developers.
Use Tool โRetainer vs Hourly Pricing Calculator
Compare retainer vs hourly pricing for freelancers. Calculate predictable income, discount rates, client retention value.
Use Tool โHouse Flipping Profit Calculator
Calculate your house flipping profit before you buy. Estimate renovation costs, holding expenses, and ROI. Includes the 70% rule validator.
Use Tool โBRRRR Method Calculator
Calculate BRRRR method returns: Buy, Rehab, Rent, Refinance, Repeat. Free tool estimates cash recycled, cash-on-cash return, and infinite return potential.
Use Tool โSelf-Employment Tax Calculator
Calculate 15.3% self-employment tax, quarterly estimated payments, and deductions. Free tool for freelancers, contractors, small business owners.
Use Tool โRent-to-Own Calculator
Calculate rent-to-own costs: option fee, rent credit, total paid vs traditional mortgage. Free tool compares lease-purchase vs buying outright.
Use Tool โGig Economy Expense Tracker
Track gig worker expenses: mileage, fuel, phone, supplies. Free tool calculates tax deductions for Uber, DoorDash, Instacart drivers.
Use Tool โRetirement Calculator
Calculate how much you need to retire at 65. Free retirement savings calculator with 401k planning. See if you
Use Tool โInvestment Calculator
Investing $500 every month? See what it becomes in 10, 20, 30 years. Real numbers, no BS. S&P 500 averages ~10%/yearโdo the math.
Use Tool โSavings Goal Calculator
Saving for a house? Car? Wedding? Find out exactly how much to save each month to hit your goal. No guesswork. Just simple math.
Use Tool โCar Loan Calculator
Want a $30k car? See your real monthly payment before the dealer shows you. 5 years at 7% = $594/month. Can you swing it? Find out now.
Use Tool โSales Tax Calculator
Calculate sales tax instantly. Find the total price including tax for any state or city. Simple, free, and accurate sales tax calculator.
Use Tool โInflation Calculator
Calculate how inflation erodes your purchasing power. See why $100,000 today might only be worth $50,000 in 20 years. Essential for retirement planning.
Use Tool โCrypto Profit Calculator
Calculate crypto gains and losses. See profit after fees and taxes. Bitcoin, Ethereum calculator with real-time insights for 2025.
Use Tool โProfit Margin Calculator
Calculate profit margin, markup percentage, and gross profit instantly. Understand the difference between margin and markup to price your products correctly.
Use Tool โCPM Calculator
Calculate CPM (Cost Per Mille), total cost, and impressions for your ad campaigns. Optimize your marketing budget with our free CPM tool.
Use Tool โVAT Calculator
Calculate VAT easily. Add VAT to net price or remove VAT from gross price. Updated for 2025 rates (UK 20%, EU, etc.). Essential for business & invoicing.
Use Tool โBreak-Even Point Calculator
Calculate your break-even point instantly. Determine how many units you need to sell to cover your costs and start making a profit. Essential for business planning.
Use Tool โSales Commission Calculator
Calculate your sales commission and total earnings instantly. Supports base salary + commission structures. Free, accurate, and mobile-friendly.
Use Tool โCAPM Calculator
Calculate expected stock returns using CAPM. Risk-free rate + beta ร market premium. See if your stock
Use Tool โWACC Calculator
Calculate Weighted Average Cost of Capital (WACC). Understand your company
Use Tool โBond Yield Calculator
Calculate bond current yield and YTM in seconds. Compare coupon rate vs real return. Free calculator for fixed-income investors.
Use Tool โDRIP Calculator
Calculate dividend reinvestment returns. See compound growth power - how your shares multiply over time. Free DRIP calculator with instant results.
Use Tool โAmortization Calculator
Calculate loan amortization schedule. View monthly payments, interest, and principal breakdown for any loan.
Use Tool โCapital Gains Tax Calculator
Calculate capital gains tax before you sell. Short-term vs long-term rates explained. Free investment tax calculator with instant results.
Use Tool โLife Insurance Calculator
Calculate your exact life insurance needs. DIME method (Debt, Income, Mortgage, Education). See why the
Use Tool โDebt-to-Income Ratio Calculator
The #1 reason mortgages get denied? High DTI. Calculate yours instantly. Learn the
Use Tool โCar Lease Calculator
Calculate monthly lease payments. Money factor, residual value, hidden fees explained. See if leasing beats buying. Free car lease calculator with real numbers.
Use Tool โโค๏ธ Health & Fitness
Pregnancy Due Date Calculator
Free pregnancy due date calculator based on your last menstrual period (LMP). Track weeks, trimesters, and get week-by-week milestones. Expert-reviewed by Sarah Jenkins, RD.
Use Tool โLean Body Mass Calculator
Calculate your lean body mass (LBM) and fat-free mass. Determine muscle mass for fitness and bodybuilding.
Use Tool โBlood Pressure Chart
Check if your blood pressure is normal, elevated, or high. Based on AHA guidelines.
Use Tool โPeriod Calculator
Calculate your next period and ovulation dates. Simple menstrual cycle tracker.
Use Tool โHeart Rate Zones Calculator
Calculate your heart rate training zones based on age and resting heart rate.
Use Tool โSmoking Cost Calculator
Calculate how much money you can save by quitting smoking. See your daily, monthly, and yearly savings.
Use Tool โWater Hardness Calculator
Calculate water hardness based on calcium and magnesium concentrations. Determine if your water is soft, moderate, hard, or very hard.
Use Tool โSleep Debt Calculator
Calculate your sleep debt based on your ideal sleep needs versus your actual sleep over the past week.
Use Tool โCaffeine Calculator
Estimate your daily caffeine intake from coffee, tea, soda, and energy drinks.
Use Tool โRunning Calorie Calculator
Estimate calories burned while running based on your weight and distance.
Use Tool โOvulation Calculator
Trying to conceive? Find your 6-day fertile window instantly. Most people miss the best days. Know exactly when to try (and when to relax).
Use Tool โ๐ป Tech & Programming
Password Generator
Generate strong, random passwords in seconds - pick your length, add symbols, numbers, whatever you need. Free secure password maker. No data saved anywhere.
Use Tool โBinary Converter
Free Binary Converter: Convert text to binary (ASCII/UTF-8) and binary to text instantly. Includes 8-bit padding, space separation, and validation. No sign-up required.
Use Tool โHex Calculator
Free Hexadecimal Calculator: Convert decimal to hex and hex to decimal instantly. Supports values 0-FFFFFFFF (4,294,967,295). Perfect for programmers, web designers, and color code conversions. No sign-up required.
Use Tool โBandwidth Calculator
Instant bandwidth & download time calculator. Calculate how long files take to download at any internet speed (Mbps, Gbps). Perfect for streaming, gaming & file transfers. 100% free.
Use Tool โUnix Timestamp Converter
Free Unix timestamp converter. Convert epoch time to human-readable dates and vice versa. Supports seconds, milliseconds, and all timezones. Essential developer tool.
Use Tool โColor Converter
Free Color Converter: Convert between HEX, RGB, HSL, and RGBA formats instantly. Includes visual color picker for web designers and developers. Supports all CSS color formats. No sign-up required.
Use Tool โMarkdown to HTML
Free online Markdown to HTML converter. Instantly convert Markdown syntax to clean HTML code with live preview. Perfect for developers and content creators.
Use Tool โURL Encoder/Decoder
Encode URLs: spacesโ%20, special charsโ%XX. Understand Reserved vs Unreserved characters. Perfect for query strings and API calls.
Use Tool โHTML Entity Encoder
Free online HTML Entity Encoder & Decoder. Safely escape special characters to prevent XSS attacks and ensure proper HTML rendering.
Use Tool โCSS Minifier
Free online CSS Minifier. Compress and optimize your CSS code to reduce file size and boost website loading speed. Removes comments and whitespace instantly.
Use Tool โQR Code Generator
Generate QR codes in seconds for URLs, text, Wi-Fi, whatever you need. Free QR code maker with instant download. No sign-up required.
Use Tool โUUID Generator
Generate cryptographically random UUIDs (v4). Bulk generator for developers. 340 undecillion possible IDs = practically zero collision risk.
Use Tool โImage Resizer
Free online image resizer. Resize photos instantly in your browser. Maintain aspect ratio, batch resize, no upload needed. Works with JPG, PNG, GIF, WebP.
Use Tool โURL Parser
Free online URL parser. Instantly extract protocol, hostname, path, query parameters, and hash from any URL. Perfect for developers and SEO professionals.
Use Tool โMeta Tag Generator
Free meta tag generator for SEO. Create HTML meta tags including title, description, keywords, Open Graph, and Twitter Cards. Boost your website
Use Tool โJSON Formatter
Format JSON, detect trailing commas, missing quotes. Validate JSON syntax instantly. Beautify or minify JSON data for APIs.
Use Tool โBase64 Converter
Convert text, files, and images to Base64. Understand why Base64 increases size by 33%. Perfect for Data URIs, JSON, and email attachments.
Use Tool โLorem Ipsum Generator
Free Lorem Ipsum generator. Create instant placeholder text for mockups, designs, and prototypes. Generate paragraphs, sentences, or words. Easy copy-paste.
Use Tool โIP Subnet Calculator
Free online IP subnet calculator. Calculate network address, broadcast, netmask, CIDR notation, and usable hosts. Essential tool for network engineers and admins.
Use Tool โChmod Calculator
Free online Chmod Calculator. Generate Linux file permissions (777, 755, 644) in numeric (octal) and symbolic formats. Essential tool for DevOps & SysAdmins.
Use Tool โCron Generator
Free online Cron Generator. Build and test crontab expressions for Linux/Unix scheduling. Supports standard syntax (minute, hour, day, month, weekday).
Use Tool โData Transfer Calculator
Calculate file transfer time instantly. Estimate how long it takes to upload or download files at various internet speeds (Mbps, Gbps).
Use Tool โRAID Calculator
Free RAID capacity calculator. Calculate usable storage for RAID 0, 1, 5, 6, and 10. Determine parity overhead and optimize your storage array configuration.
Use Tool โVoltage Drop Calculator
Free voltage drop calculator for electrical circuits. Calculate wire gauge requirements for any distance, current, and voltage. Supports AWG, copper & aluminum. Essential for electricians.
Use Tool โBattery Life Calculator
Free battery life calculator. Estimate how long your battery will last based on capacity (mAh) and consumption (mA). Perfect for IoT, drones, and electronics projects.
Use Tool โPixel Density Calculator
Free PPI calculator for screens and displays. Calculate pixels per inch (PPI) from resolution and screen size. Perfect for designers, developers, and tech enthusiasts.
Use Tool โโก Physics Calculators
Speed Calculator
Calculate speed, distance, or time in seconds - just enter two values. Works for mph, km/h, m/s, whatever units you need. Free speed and velocity calculator.
Use Tool โForce Calculator
Calculate force, mass, or acceleration in seconds using F=ma. Enter any two values, get the third. Free physics calculator for Newton
Use Tool โWork & Energy Calculator
Free work and energy calculator using W=Fรd formula. Calculate work done by force instantly. Perfect for physics students, engineers, and mechanical analysis.
Use Tool โKinetic Energy Calculator
Calculate kinetic energy in seconds using KE = ยฝmvยฒ. Enter mass and velocity, get energy in Joules. Free physics calculator for moving objects.
Use Tool โPower Calculator
Calculate power, work, or time in seconds using P=W/t. Enter any two values, get the third. Free physics calculator for power in Watts.
Use Tool โ๐งช Chemistry Calculators
Molar Mass Calculator
Free molar mass calculator for instant molecular weight calculations. Enter chemical formulas (H2O, C6H12O6, NaCl) for accurate results. Perfect for chemistry students and labs.
Use Tool โMolarity Calculator
Free molarity calculator for instant solution concentration calculations. Calculate M = moles/L with step-by-step guidance. Perfect for chemistry labs, titrations, and solution prep.
Use Tool โpH Calculator
Free pH calculator for instant acidity measurements. Calculate pH from H+ concentration or convert pH to H+. Perfect for chemistry labs, pools, aquariums, and water testing.
Use Tool โ๐ Unit Converters
Pressure Converter
Convert between pressure units: Pascal, Bar, PSI, Atmosphere, Torr, and more.
Use Tool โEnergy Converter
Convert between energy units: Joules, Calories, Kilowatt-hours, and BTU.
Use Tool โPower Converter
Convert power units instantly. 1 HP = 746 watts. Perfect for engines, motors, and electrical calculations. Free power conversion tool.
Use Tool โVolume Converter
Free volume converter for liters, gallons (US/UK), cups, milliliters, and fluid ounces. Convert cooking and liquid units instantly with expert guidance.
Use Tool โArea Converter
Convert area units instantly. 1 acre = 43,560 ftยฒ = 4,047 mยฒ. Perfect for land measurements, real estate, and construction.
Use Tool โSpeed Converter
Free speed converter for mph, km/h, m/s, and knots. Convert velocity units instantly with expert guidance. Perfect for drivers, pilots, and physics students.
Use Tool โData Size Converter
Convert between data storage units: Bytes, Kilobytes, Megabytes, Gigabytes, Terabytes.
Use Tool โFuel Consumption Calculator
Calculate fuel consumption instantly. 30 MPG = 7.8 L/100km. Track gas mileage and fuel costs. Perfect for road trips and budgeting.
Use Tool โDistance Converter
Free distance converter for kilometers, miles, meters, and feet. Convert lengths instantly with expert guidance. Perfect for travel, engineering, and science.
Use Tool โWeight Converter
Free weight and mass converter for kilograms, pounds, ounces, and grams. Convert mass units instantly with expert guidance. Perfect for cooking, fitness, and science.
Use Tool โ๐ง Other Tools
Drawer Slide Position Calculator
Calculate mounting hole locations for side/undermount slides.
Use Tool โCabinet Door Overlay Calculator
Calculate exact door sizes for overlay, inset, and double doors.
Use Tool โAge Calculator
Find your exact age in years, months, days, hours, and minutes. Got a birthday coming up? Need to know if you
Use Tool โTime Calculator
Free time calculator - add or subtract hours and minutes instantly. Working 8:30am to 5:15pm? That
Use Tool โCurrency Converter
Convert currencies instantly. Live exchange rates for 150+ currencies. USD, EUR, GBP, JPY, CNY and more. Free & accurate.
Use Tool โFuel Cost Calculator
Free Fuel Cost Calculator. Estimate gas expenses for your trip based on distance, MPG, and fuel price. Plan your road trip budget accurately.
Use Tool โTime Zone Converter
Convert time zones instantly. Schedule meetings across NYC, London, Tokyo, Sydney. Perfect for remote teams and travelers.
Use Tool โCountdown Timer
Countdown to any event. Track days until Christmas, your birthday, vacation. Real-time timer updates every second.
Use Tool โWord Counter
Free word counter - count words, characters, sentences instantly. Writing a 500-word essay? Need exact character count for Twitter? Paste your text and get live counts.
Use Tool โOnline Stopwatch
Free online stopwatch with lap timer. Track splits for running, workouts, cooking. Accurate to 0.01 seconds.
Use Tool โRecipe Converter
Scale recipes instantly. Recipe serves 4, need 12? Just multiply ingredients. No math stress. Perfect for holiday cooking.
Use Tool โCooking Time Calculator
Calculate cooking time adjustments instantly. Scaling up a roast? Enter original weight/time and new weight. Perfect for Thanksgiving turkeys and Sunday roasts.
Use Tool โPaint Calculator
Free Paint Calculator. Estimate exactly how many gallons or liters of paint you need for walls, rooms, and ceilings. Accounts for windows, doors, and coats.
Use Tool โWallpaper Calculator
Calculate wallpaper rolls needed for any room. Includes pattern repeat allowance and waste factor. Standard 10m rolls with 53cm width.
Use Tool โConcrete Calculator
Free Concrete Calculator. Calculate exactly how many bags of concrete (60lb, 80lb) or yards you need for slabs, footings, and columns. Expert tips included.
Use Tool โTile Calculator
Free Tile Calculator. Calculate exactly how many tiles you need for floors, walls, and backsplashes. Includes waste factor and layout patterns.
Use Tool โMorse Code Translator
Translate text to Morse code and Morse code to text. Learn Morse code easily.
Use Tool โText Case Converter
Convert text to uppercase, lowercase, title case, sentence case, camelCase, or snake_case. 6 formats in one click. Perfect for developers and writers.
Use Tool โLove Calculator
Check your love compatibility instantly with our free Love Calculator. Enter two names to find your relationship score. Fun, fast, and easy to use.
Use Tool โZodiac Sign Calculator
Discover your Zodiac sign instantly with our accurate calculator. Learn about your Sun sign
Use Tool โDice Roller
Roll virtual dice online. Choose number of dice and sides. Perfect for games and D&D.
Use Tool โBraille Translator
Convert text to Braille instantly. Perfect for educators, accessibility designers, and learners. Unicode Braille patterns for all letters.
Use Tool โMeeting Cost Calculator
Calculate the real cost of meetings. A 1-hour meeting with 8 people at $50/hr = $400. How much are your meetings wasting?
Use Tool โTV Size Calculator
Calculate the perfect TV size for your room. Distance based recommendations for 1080p and 4K UHD screens. Find out if you need 55, 65, or 75 inches.
Use Tool โDog Age Calculator
How old is your dog in human years? Get the answer in seconds - small, medium, or large breed. First 2 years age faster, then it slows. Free dog age converter.
Use Tool โCat Age Calculator
How old is your cat in human years? Find out in seconds - just enter their age. First year = 15 human years, second = 9, then 4 per year. Free cat age converter.
Use Tool โBook Reading Time Calculator
Calculate reading time for any book. See if you can finish before bed. Average reader: 400 pages โ 13 hours. Adjust for your speed.
Use Tool โDeck Calculator
Plan your deck project with our free calculator. Estimate decking boards, screws, and total material cost. Includes waste factor and expert building tips.
Use Tool โFence Calculator
Calculate fence materials and installation costs instantly. Estimate panels, posts, and total budget for wood, vinyl, or chain link fences. Includes expert tips.
Use Tool โRoof Calculator
Calculate roofing materials needed for your project. Estimate shingles, squares, bundles, and total cost. Includes pitch factor and waste allowance.
Use Tool โProfit Margin Calculator
Calculate profit margin, markup, and revenue. Essential tool for businesses and e-commerce sellers.
Use Tool โShipping Cost Calculator
Free Shipping Cost Calculator. Estimate shipping rates by weight, distance, and service type. Compare Ground vs Express costs instantly.
Use Tool โPool Cost Calculator
Calculate pool volume in gallons, surface area, and construction costs. Estimate inground and above-ground pool expenses with chemical and utility costs.
Use Tool โGravel Calculator
Calculate gravel, crushed stone, and aggregate needed for driveways and landscaping. Estimate tons, cubic yards, and total cost. Includes compaction factor.
Use Tool โ๐ Siding Calculator
Calculate siding squares, trim accessories, and total materials needed. Supports vinyl, wood, aluminum, and fiber cement with waste factor and complete accessory list.
Use Tool โMulch Calculator
Calculate mulch needed for flower beds and gardens. Estimate cubic yards, bags, and cost. Compare bulk vs. bagged mulch prices. Includes expert landscaping tips.
Use Tool โHourly Rate Calculator
Calculate your hourly rate for freelancing and consulting. Factor in expenses, taxes, and desired income.
Use Tool โAspect Ratio Calculator
Calculate screen dimensions in seconds - 16:9, 4:3, 21:9, you name it. Got the width, need the height? Or vice versa? Free aspect ratio calculator handles it all.
Use Tool โBarcode Generator
Generate Code 128 barcodes in seconds - type your text or numbers, download the image. Free barcode maker for products, inventory, shipping labels, whatever you need.
Use Tool โBiorhythm Calculator
Calculate your Physical, Emotional, and Intellectual biorhythms instantly. Understand your daily energy levels and plan your activities for peak performance.
Use Tool โCarbon Footprint Calculator
Calculate your carbon footprint. Average American emits 16 tons COโ/year. Find where you stand and how to reduce emissions.
Use Tool โWind Chill Calculator
Calculate wind chill (feels-like temperature). Find out when frostbite risk is extreme. Wind chill of -20ยฐF = frostbite in 30 min.
Use Tool โHash Generator
Generate MD5, SHA-1, SHA-256 hashes online. Free hash generator tool for text encryption.
Use Tool โ๐จ๏ธ 3D Print Cost Calculator
Calculate accurate 3D printing costs including filament, electricity, labor, and machine time. Free tool for FDM and resin printers with material cost breakdown.
Use Tool โ๐ 529 Plan Calculator
Calculate 529 college savings plan growth. See how monthly contributions compound tax-free. Plan realistic college funding. Average 529 balance: $25,000.
Use Tool โโ๏ธ AC Tonnage Calculator
Calculate the perfect air conditioner size (tonnage and BTU) for your home. Accounts for square footage, climate zone, insulation, and sun exposure. Avoid oversizing or undersizing your AC.
Use Tool โ๐ Acoustic Panel Calculator
Calculate acoustic panel coverage for studio, home theater, or office. Based on room volume and reverberation time goals.
Use Tool โAirbnb Income Calculator
Calculate your Airbnb rental income potential. Free tool estimates monthly revenue, occupancy rates, and net profit after expenses. Includes expert tips for maximizing STR earnings.
Use Tool โ๐จ Airflow CFM Calculator
Calculate HVAC airflow (CFM) from air velocity (FPM) readings. Supports rectangular and round grilles, Ak factors, and multi-point averaging. Essential for air balancing.
Use Tool โ๐ธ Alcohol Dilution Calculator
Calculate precise alcohol dilution. Mix spirits, adjust ABV/proof, add water to lower alcohol content for cocktails, infusions, and whiskey tasting.
Use Tool โ๐ฉ Anchor Bolt Spacing Calculator
Calculate anchor bolt spacing for sill plates according to IRC/IBC building codes. Determine total bolts needed, corner placement, and max spacing requirements.
Use Tool โโก Appliance Energy Cost Calculator
Calculate appliance electricity costs. Find energy vampires, compare running costs, estimate monthly bills. Optimize energy usage and save money.
Use Tool โ๐ฟ Aquarium CO2 Calculator
Calculate precise CO2 levels for planted aquariums using KH and pH. Get bubble count rates, injection timing, and safe CO2 ranges. Free tool for aquascaping.
Use Tool โ๐ Aquarium Size Calculator
Calculate aquarium volume in gallons and liters based on dimensions. Includes substrate displacement and fish stocking capacity guide. Perfect for freshwater and saltwater tanks.
Use Tool โ๐ Aquarium Stocking Calculator
Calculate how many fish your aquarium can safely hold. Uses surface area method + bioload. Prevents overstocking and fish deaths. Freshwater & saltwater compatible.
Use Tool โ๐ต Audio File Size Calculator
Calculate audio file sizes by format, bitrate, length. Estimate storage for MP3, WAV, FLAC, AAC. Plan podcast, music library, recording projects.
Use Tool โ๐๏ธ Baluster Spacing Calculator
Calculate perfect baluster spacing for deck railings. IBC code compliant (4 inch max). Works for any railing length and baluster width. Free deck builder tool.
Use Tool โBarcode Check Digit Calculator
Calculate and validate check digits for barcodes (UPC-A, EAN-13, EAN-8, ISBN, ITF-14). Ensure your product codes are scannable and compliant with GS1 standards.
Use Tool โOff-Grid Battery Bank Calculator
Calculate battery bank size for off-grid solar systems. Free tool estimates amp-hours, battery count, and days of autonomy for cabin, RV, or homestead power.
Use Tool โ๐ Battery Runtime Calculator
Calculate battery life for your device. Estimate runtime based on battery capacity (mAh/Ah) and load current. Supports Li-ion, Lead Acid, NiMH, and more.
Use Tool โ๐ Beam Load Calculator
Calculate beam deflection, maximum load capacity, and bending stress for wood and steel beams. Check code compliance (L/360, L/240) for residential and commercial applications.
Use Tool โ๐ Beehive Honey Production Calculator
Calculate annual honey production and potential revenue based on hive count, location quality, and colony strength. Essential tool for beekeepers.
Use Tool โ๐ชต Board Foot Calculator
Calculate board feet for hardwood lumber pricing. Converts thickness, width, length to board feet. Includes cost calculator and common lumber sizes. Free woodworking tool.
Use Tool โ๐ Break-Even Analysis Calculator
Calculate break-even point for your business. Find units to sell and revenue needed to cover fixed and variable costs. Essential startup financial planning tool.
Use Tool โ๐ Buy vs Rent Calculator
Compare buying vs renting costs. Calculate mortgage, taxes, maintenance vs rent. Make informed housing decisions.
Use Tool โโ Caffeine Curfew Calculator
Calculate your personal caffeine curfew based on sleep time and caffeine half-life. Optimize coffee timing to avoid sleep disruption and insomnia.
Use Tool โ๐ฏ๏ธ Candle Wax Calculator
Calculate perfect wax amounts for candle making. Get precise measurements for fragrance oil, dye, and wick sizing. Free calculator for soy, paraffin, and beeswax candles.
Use Tool โ๐จ Canvas Stretcher Calculator
Calculate the total canvas fabric size needed for stretching. Determine stretcher bar lengths, cross bracing requirements, and wrap depth for custom art canvases.
Use Tool โ๐ Car vs Uber Cost Calculator
Calculate true cost of car ownership vs Uber/Lyft rideshare. Includes insurance, maintenance, depreciation, parking. Average car costs $10,000/year vs Uber $3,000-$8,000.
Use Tool โ๐ต Cash Flow Calculator
Project monthly cash flow for your business. Track income, expenses, and ending cash balance. Avoid cash crunches. Essential for small business planning.
Use Tool โ๐ฑ Cat Feeding Calculator
Calculate exact daily food portions for your cat based on weight, age, and activity level. Veterinarian-approved formula prevents obesity and underfeeding.
Use Tool โ๐ฑ Cat Litter Box Calculator
Calculate number of litter boxes needed for multiple cats. Optimize cleaning schedule and litter usage.
Use Tool โ๐บ Ceramic Glaze Calculator
Calculate ceramic glaze recipes with Unity Molecular Formula (UMF). Convert batch recipes to UMF, adjust firing temperatures, and get glaze chemistry analysis.
Use Tool โ๐ Chicken Egg Production Calculator
Calculate egg production from backyard chickens. Estimate eggs per week based on flock size and breed.
Use Tool โ๐ถ Childcare Cost Calculator
Calculate childcare costs: daycare, nanny, preschool, after-school care. Compare options vs parent staying home. Average US childcare: $10,000-$25,000/year.
Use Tool โ๐ Circuit Breaker Sizing Calculator
Calculate proper circuit breaker size using NEC code. Handles continuous loads (125% rule), motor circuits, and standard vs 100% rated breakers.
Use Tool โ๐งฑ CMU Block Calculator
Calculate the number of concrete blocks (CMU), mortar bags, and rebar needed for your wall project. Supports standard 8x8x16 blocks, half blocks, and opening deductions.
Use Tool โโ Coffee Brewing Ratio Calculator
Calculate perfect coffee brewing ratios. Get precise coffee-to-water ratios for pour over, French press, espresso, cold brew. Optimize strength and extraction.
Use Tool โโ Coffee Ratio Calculator
Calculate the perfect coffee-to-water ratio for Pour Over, French Press, Chemex, and Cold Brew. Golden Cup Standard 1:15 to 1:18.
Use Tool โ๐ College Cost Calculator
Calculate true 4-year college costs including tuition, room & board, fees, books, and inflation. Average private college: $300,000+. Plan realistic budgets.
Use Tool โ๐ฑ Composting Time Calculator
Calculate composting time. Estimate weeks to finished compost based on method and conditions.
Use Tool โโก Conduit Fill Calculator (NEC 2020)
Calculate maximum wire fill for electrical conduit per NEC code. EMT, PVC, rigid conduit fill calculator with 40% derating rule. For electricians.
Use Tool โ๐จ Contrast Ratio Calculator
Check color contrast ratio for web accessibility. Ensure WCAG AA and AAA compliance for text readability.
Use Tool โ๐ Cost Per Wear Calculator
Calculate true cost per wear of clothing. Justify investment pieces vs fast fashion. Build sustainable wardrobe with smart spending decisions.
Use Tool โ๐งต Cross Stitch Calculator
Calculate fabric size, thread length, and project costs for cross stitch. Get accurate estimates for any count fabric (14, 16, 18, 28 count) and design dimensions.
Use Tool โ๐จ Crown Molding Angle Calculator
Calculate exact miter and bevel angles for crown molding cuts. Supports 38ยฐ, 45ยฐ, 52ยฐ spring angles and any wall corner angle. Professional carpenter
Use Tool โ๐๏ธ Deck Cost Calculator
Calculate deck building costs. Pressure-treated: $20-35/sq ft. Composite: $35-50/sq ft. 300 sq ft deck: $6,000-15,000. Accurate material + labor estimates.
Use Tool โ๐ Dog Chocolate Toxicity Calculator
Calculate chocolate toxicity risk for dogs. Determine if vet visit needed based on dog weight and chocolate type/amount.
Use Tool โDog Food Calculator
Calculate how much food your dog needs based on weight, age, and activity level. Free tool provides daily calorie requirements and portion sizes for dry, wet, and raw food.
Use Tool โ๐ผ๏ธ DPI/PPI Converter & Print Size Calculator
Convert DPI to PPI, calculate print sizes, image dimensions. Optimize resolution for web, print, screens. Convert pixels to inches/cm for design work.
Use Tool โ๐ Drain Slope Calculator
Calculate the correct slope for drain pipes (DWV) per IPC/UPC codes. Determine vertical drop and check minimum slope requirements for plumbing drainage systems.
Use Tool โ๐ง Drywall Screw Spacing Calculator
Calculate proper drywall screw spacing for walls and ceilings. IRC code-compliant spacing, screw count estimation, and installation guidelines for field and edge fastening.
Use Tool โโ๏ธ Duct Sizing Calculator
Calculate HVAC duct sizes based on airflow (CFM) and velocity (FPM). Supports rectangular and round ducts. Follows ACCA Manual D guidelines for quiet, efficient systems.
Use Tool โโก Electrical Box Fill Calculator
Calculate electrical box fill per NEC code. Determine if junction box or outlet box has adequate cubic inch capacity. Free tool for electricians.
Use Tool โโก Electrolyte Replacement Calculator
Calculate electrolyte needs for exercise, heat, illness. Get sodium, potassium, magnesium targets for DIY sports drinks and rehydration.
Use Tool โ๐ Epoxy Resin Calculator
Calculate perfect epoxy resin amounts for molds and projects. Get precise mixing ratios, volume calculations, and cost estimates. Free tool for resin artists and crafters.
Use Tool โEV Charging Cost Calculator
Calculate EV charging costs at home and public stations. Compare electric car vs gas savings, charge time estimates, and annual fuel cost breakdown.
Use Tool โโ๏ธ Fabric Yardage Calculator
Calculate fabric yardage needed for upholstery, curtains, or sewing projects. Accounts for pattern repeats (vertical/horizontal) and fabric width to ensure pattern matching.
Use Tool โโณ Intermittent Fasting Schedule
Calculate your intermittent fasting schedule. Find your eating window for 16:8, 18:6, 20:4, and OMAD protocols.
Use Tool โ๐ก Fence Cost Calculator
Calculate fence installation costs. Wood: $15-30/ft. Vinyl: $20-40/ft. Chain link: $8-15/ft. Includes materials, labor, gates. Get accurate estimates.
Use Tool โ๐ Final Grade Calculator
Calculate what grade you need on your final exam to get your desired course grade. Includes
Use Tool โ๐๏ธ Footing Size Calculator
Calculate the required concrete footing width and depth based on soil bearing capacity, wall load, and building codes. Essential for foundation design and basement footings.
Use Tool โ๐ฒ Gacha Probability Calculator
Calculate gacha game pull probabilities. Predict SSR/5-star rates, pity system odds, expected pulls for Genshin Impact, mobile games, loot boxes.
Use Tool โ๐ฟ Garden Spacing Calculator
Calculate garden plant spacing. Determine plants per square foot and row spacing for vegetables.
Use Tool โโจ Golden Ratio Calculator
Calculate golden ratio (phi ฯ โ 1.618) for design, art, and architecture. Find proportions for rectangles, logos, layouts, and composition using the divine proportion.
Use Tool โ๐ฅ Heat Load Calculator
Calculate HVAC heat load (Manual J block load) for your room or house. Estimate heating and cooling BTU requirements based on insulation, windows, and climate.
Use Tool โHeat Pump vs Furnace Cost Calculator
Compare heat pump vs gas furnace costs. Calculate 15-year savings, federal tax credit ($2,000 ITC), and payback period for electric vs gas heating.
Use Tool โ๐ Home Improvement ROI Calculator
Calculate ROI on home renovations. Kitchen remodel: 60-80% return. Bathroom: 70%. Minor updates beat major overhauls. Plan profitable improvements.
Use Tool โ๐ Insulation R-Value Calculator
Calculate insulation R-value needed for walls, ceilings, and attics based on IECC climate zones. Compare fiberglass, spray foam, cellulose costs and thickness requirements.
Use Tool โโฐ Intermittent Fasting Calculator
Calculate your intermittent fasting schedule. Get eating windows, meal timing, and calorie targets for 16:8, 18:6, 20:4, OMAD, 5:2, and alternate-day fasting.
Use Tool โ๐ Joist Spacing Calculator
Calculate maximum joist span and spacing for floors, ceilings, and roofs. IRC span table lookup for 2x6, 2x8, 2x10, 2x12 joists at 12\
Use Tool โโ Latte Factor Calculator
Calculate how small daily expenses add up over time. See the true cost of your $5 coffee habit. Visualize compound savings from cutting small recurring costs.
Use Tool โ๐ก LED Series Resistor Calculator
Calculate the perfect series resistor for your LED circuit. Prevent burnout by finding the right resistance and power rating for single or multiple LEDs.
Use Tool โ๐ชต Lumber Span Calculator
Calculate maximum span for lumber joists and rafters. Supports various wood species, grades, and loads.
Use Tool โ๐ฅ Meal Macro Splitter
Calculate your daily macros (Protein, Carbs, Fat) based on calories. Presets for Keto, Bodybuilding, and Balanced diets.
Use Tool โ๐ฝ๏ธ Meal Macro Splitter
Calculate how to split daily macros across meals. Get protein, carbs, and fat targets for each meal to hit daily macro goals for bodybuilding, weight loss, or health.
Use Tool โ๐ฅฉ Meat Thawing Time Calculator
Calculate safe thawing time for frozen meat. Get precise defrost times for chicken, beef, pork, and seafood using fridge, cold water, or microwave methods.
Use Tool โ๐งฑ Mortar Calculator
Calculate how much mortar you need for bricks, concrete blocks (CMU), or stone. Estimates pre-mixed bags (60lb/80lb) and bulk cement/sand ratios (Type N, S, M).
Use Tool โ๐ฆ Moving Cost Calculator
Calculate moving costs for local, long-distance, and cross-country moves. Includes truck rental, movers, packing supplies, and hidden fees. Average costs: $1,500-$12,000.
Use Tool โ๐จ Paint Mixing Ratio Calculator
Calculate exact paint mixing ratios for automotive paint, epoxy, clear coat, and acrylics. Supports 2-part and 3-part mixes (Paint:Hardener:Thinner) by volume.
Use Tool โ๐ Password Strength Checker
Check password strength and security. Get real-time feedback on password quality with crack time estimates.
Use Tool โ๐งฑ Paver Sand & Base Calculator
Calculate sand, gravel base, and pavers needed for your project. Estimates cubic yards, tons, and bags. Free tool for DIY patio and driveway installations.
Use Tool โ๐พ Pet Insurance Calculator
Calculate if pet insurance is worth it for your dog or cat. Compare premiums vs vet bills, break-even analysis, and lifetime savings. Unbiased cost comparison.
Use Tool โ๐ด PEX Expansion Calculator
Calculate PEX pipe thermal expansion and contraction based on temperature change. Determine proper support spacing and expansion compensation methods for PEX plumbing systems.
Use Tool โ๐ง Pipe Sizing Calculator
Calculate the correct water pipe size based on flow rate (GPM) and velocity (FPS). Determine pressure loss and ensure code compliance for residential and commercial plumbing.
Use Tool โ๐ฑ Plant Pot Size Calculator
Calculate correct pot size for plants. Determine soil volume needed, drainage requirements, repotting schedule. Optimize container gardening success.
Use Tool โ๐ Pomodoro Planner
Plan your workday with the Pomodoro Technique. Calculate work intervals and break times to create a productive schedule.
Use Tool โ๐ฐ Pricing Calculator
Calculate optimal pricing for your product or service. Factor in costs, desired profit margin, and market positioning. Ensure profitability from day one.
Use Tool โ๐จ๏ธ Print DPI Calculator
Calculate the maximum print size for your digital photos based on pixel dimensions and DPI. Convert pixels to inches/cm for high-quality printing (300 DPI).
Use Tool โ๐ง Psychrometric Calculator
Calculate moist air properties including Enthalpy, Dew Point, Humidity Ratio (Grains), and Relative Humidity. Essential tool for HVAC psychrometrics and air conditioning processes.
Use Tool โ๐ฑ Raised Bed Soil Calculator
Calculate soil needed for raised garden beds. Determine cubic feet and bags required for any bed size.
Use Tool โ๐ Readability Score Calculator
Check the readability of your text. Calculate Flesch Reading Ease, Flesch-Kincaid Grade Level, and Gunning Fog Index. Improve your writing for better audience engagement.
Use Tool โ๐๏ธ Rebar Weight Calculator
Calculate rebar weight by size and length. Includes weight per foot chart for #3 to #11 rebar. Essential tool for concrete contractors and estimators.
Use Tool โ๐ก Recessed Lighting Layout Calculator
Calculate optimal recessed can light spacing and layout. Professional lighting design tool with room dimensions, beam angles, and avoiding dark spots. For electricians and contractors.
Use Tool โโ๏ธ Refrigerant Charge Calculator
Calculate HVAC refrigerant charge using Superheat (Fixed Orifice) or Subcooling (TXV) methods. Determine Target Superheat and diagnose Undercharged/Overcharged systems.
Use Tool โ๐จ Resistor Color Code Calculator
Calculate resistor values from color codes. Supports 4-band and 5-band resistors. Visual interface for easy identification of resistance and tolerance.
Use Tool โ๐ Road Trip Cost Splitter
Split road trip costs fairly. Calculate per-person share for gas, tolls, hotels, food. Handle uneven passenger legs and driver bonuses.
Use Tool โ๐ Roof Pitch Calculator
Calculate roof pitch (rise/run), convert to degrees, determine rafter length, and get material recommendations. Essential tool for roofing contractors and DIY projects.
Use Tool โ๐ Semester GPA Calculator
Calculate your semester and cumulative GPA. Input courses, credits, and grades to get accurate GPA calculations for college or high school.
Use Tool โโ๏ธ Skylight Sizing Calculator
Calculate optimal skylight size using 5-15% room floor area ratio. IRC R310 egress requirements, curb height codes, and energy-efficient sizing recommendations.
Use Tool โโ๏ธ Skylight Size Calculator
Calculate the ideal skylight size for your room based on floor area, usage, and climate. Avoid overheating while maximizing natural light.
Use Tool โ๐งผ Soap Making Lye Calculator
Calculate precise lye (NaOH/KOH) and water amounts for cold process soap making. Get saponification values, superfat percentages, and safety guidelines for all oils.
Use Tool โ๐ฑ Social Media Image Size Guide 2024
Get optimal image sizes for all social media platforms. Instagram posts, Facebook covers, Twitter headers, LinkedIn banners. Updated 2024 specs.
Use Tool โ๐ Soffit and Fascia Calculator
Calculate soffit and fascia materials. Estimate panels, vents, and trim for your roof overhangs.
Use Tool โSolar Panel Savings Calculator
Calculate solar panel savings, payback period, and 25-year ROI. Free tool includes federal tax credit (30% ITC), net metering, and real electricity cost analysis.
Use Tool โ๐ฅ Sourdough Hydration Calculator
Calculate perfect sourdough hydration levels with baker
Use Tool โ๐๏ธ Speaking Time Converter
Convert word count to speaking time. Calculate how long your speech or presentation will take based on your reading speed (WPM).
Use Tool โ๐จ Spray Paint Calculator
Calculate how many spray paint cans you need based on surface area and coats. Includes coverage rates for different finishes.
Use Tool โ๐๏ธ SQL Query Formatter
Format and beautify SQL queries. Automatically indent, align keywords, and improve readability of SQL code.
Use Tool โ๐ช Stair Stringer Calculator
Professional stair stringer calculator for carpenters. Calculate rise, run, steps, stringer length & angles. IBC code compliant. Free tool with cutting templates.
Use Tool โ๐ผ Startup Cost Calculator
Calculate startup costs for your business. Average: $30,000-$50,000. Includes equipment, inventory, marketing, legal, working capital. Plan realistic budgets.
Use Tool โ๐ก Stream Bitrate Calculator
Calculate optimal streaming bitrate for Twitch, YouTube, Facebook Gaming. Get OBS/Streamlabs settings for 1080p, 720p, upload speed, encoding.
Use Tool โ๐จ Stud Wall Framing Calculator
Calculate studs, plates, and framing materials for wall construction. Supports 16 OC and 24 OC spacing. Free tool for framers and DIYers.
Use Tool โ๐ Student Loan Payoff Calculator
Calculate student loan payoff timeline with extra payments. See total interest saved and debt-free date. Average debt: $37,000. Plan your repayment strategy.
Use Tool โ๐ Study Time Calculator
Calculate study time needed for exams. Plan study schedule based on material and exam date.
Use Tool โ๐ณ Subscription Cost Manager
Track all subscription costs. Calculate total monthly/yearly spending. Find unused subscriptions draining budget.
Use Tool โ๐ง Sump Pump Sizing Calculator
Calculate the correct sump pump size (GPH/GPM) and horsepower based on basement area, water inflow rate, and discharge head. Prevent flooding with proper pump sizing.
Use Tool โโฑ๏ธ Time Lapse Calculator
Calculate time lapse video settings. Convert recording time to playback duration, optimize intervals, frame rates. Plan construction, sunset, cloud time lapses.
Use Tool โ๐ฐ Tip Calculator & Bill Splitter
Calculate restaurant tips and split bills. 15%, 18%, 20% tip options. Divide total among friends easily.
Use Tool โโก Transformer Sizing Calculator
Calculate the required kVA rating for your transformer. Supports single-phase and three-phase systems. Find the right transformer size for your electrical load.
Use Tool โAa Typography Calculator
Calculate the perfect line height (leading) for your web typography. Generate CSS for optimal readability using Golden Ratio and vertical rhythm principles.
Use Tool โ๐ Wallpaper Calculator
Calculate wallpaper rolls needed with pattern repeat matching. Accounts for drop match, straight match, and waste factor.
Use Tool โ๐ฅ Water Heater Sizing Calculator
Calculate the correct water heater size based on household occupants, usage patterns, and First Hour Rating (FHR). Compare gas, electric, and tankless water heaters.
Use Tool โ๐ Website Carbon Footprint Calculator
Calculate website carbon footprint. Analyze page weight, CO2 emissions per visit, optimize for sustainability. Reduce energy consumption and environmental impact.
Use Tool โ๐ Wedding Budget Calculator
Calculate your wedding costs with realistic budget breakdown by category. Track spending, vendor costs, and guest count. Average US wedding costs: $30,000-$35,000.
Use Tool โโก Wire Gauge Ampacity Calculator
Calculate wire gauge ampacity using NEC Table 310.16. Copper and aluminum conductor ratings for 60ยฐC, 75ยฐC, 90ยฐC temperature ratings.
Use Tool โ๐ Words to Pages Calculator
Calculate pages from word count. Estimate essay, book, manuscript page length with formatting.
Use Tool โ๐ Z-Score Calculator
Calculate Z-scores from raw data values. Determine how many standard deviations a value is from the mean.
Use Tool โ