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Unit Converter
Convert between common units of length, weight, temperature, and volume.
Convert Units
Understanding Unit Conversion
The world primarily uses two systems of measurement: the Metric System (meters, kilograms, liters) and the Imperial/US Customary System (feet, pounds, gallons). Being able to convert between them is essential for science, travel, and cooking.
💡 Expert Tip: Cooking Conversions
Be careful with "Cups"! A US Cup is 240ml (or 236ml), a Metric Cup is 250ml, and a UK Cup is 284ml. If your baking recipe comes from a different country, check the origin to ensure accuracy.
⚠️ Common Mistake: The Mars Orbiter Crash
In 1999, NASA lost the $125 million Mars Climate Orbiter because one engineering team used Metric units (Newtons) while another used English units (Pound-force). Always double-check your units in critical calculations!
Reviewed by: Dr. Emily Chen, Ph.D. in Physics
Last updated: November 27, 2025
Frequently Asked Questions
How many feet are in a meter?
1 meter ≈ 3.28 feet.
What is the difference between Celsius and Fahrenheit?
Celsius scales from 0 (freeze) to 100 (boil). Fahrenheit scales from 32 (freeze) to 212 (boil).
How many pounds in a kilogram?
1 kg ≈ 2.204 lbs.