How do you generate a random number?

Set your min and max values (like 1-100), choose how many numbers you want, then click Generate. The tool uses JavaScript's Math.random() function to create truly random numbers.

Are these numbers truly random?

They're pseudo-random, which means they're random enough for games, raffles, and everyday use. For serious cryptography or high-stakes security, you'd need a hardware random number generator.

Can I generate lottery numbers with this?

Yes. Click the Lottery preset (gives you 5 numbers between 1-100) or set your own range. Most lotteries use different ranges though - check your lottery's rules first.

Will the same number appear twice?

Yes, duplicates can happen. If you generate 10 numbers between 1-6, you'll definitely get repeats. For unique numbers (like lottery balls), you'd need a different tool that prevents duplicates.

Can I use this for a coin flip?

Yes. Click the Coin Flip preset (generates 0 or 1). 0 = Heads, 1 = Tails. Or pick your own assignment.

Home / Other / Random Number Generator

Random Number Generator

Generate random numbers for any purpose - games, statistics, or decisions.

Generator Settings

Minimum Number

Maximum Number

Quantity

Generated Numbers

Click Generate to create random numbers

Random Number Generation

Random number generators are used in many applications including games, lotteries, statistics, cryptography, and decision-making.

Common Uses

Games: Dice rolling, card shuffling, random events
Lottery: Picking lottery numbers
Statistics: Sampling, simulations, random testing
Decisions: Making unbiased choices
Education: Creating test questions, seating arrangements

Quick Presets

Dice (1-6): Standard six-sided die
Lottery: Generate 5 lottery numbers 1-100
Coin Flip: 0 or 1 (Heads or Tails)
1-10: Simple number picker

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Reviewed by Dr. Alex M., Ph.D.

Last updated: November 2025

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💡 Expert Tips

Pseudo-Random vs True Random

This tool uses pseudo-random numbers (computer-generated). They're perfectly fine for games, classroom use, and picking raffle winners. But if you're doing cryptography or high-security stuff, you need a hardware random number generator. The difference? Pseudo-random has a pattern (technically), but it's so complex no human can predict it.

The Duplicate Problem

If you generate 10 numbers between 1-6, you'll get repeats. That's how probability works. If you need unique numbers (like lottery balls that don't go back in the drum), you need a different tool. Or generate more numbers than you need and manually skip duplicates.

Seeding and Repeating Results

Every time you click Generate, you get different numbers. If you want the same sequence again, you'd need to record them manually. There's no "seed" feature here - it's pure random every time. Some advanced RNG tools let you set a seed for reproducible results (useful in science/testing).

⚠️ Common Mistakes

Wrong Lottery Range

Powerball uses 1-69 for white balls and 1-26 for the red ball. Mega Millions is 1-70 and 1-25. Don't just click "Lottery" and assume it matches your state's lottery. Check the rules first.

Expecting No Duplicates

People get confused when they generate 5 numbers and get two 7s. That's normal. Random doesn't mean "evenly distributed." It means "any outcome is possible." If you roll a real die 10 times, you might get three 6s.

Min/Max Confusion

Setting min=10 and max=5 won't work. Min has to be smaller than max. Also, both numbers are included - so 1-10 can give you 1, 2, 3... all the way to 10. It's not "1-9."