Random number between 1 and 100
One tap for a random number from 1 to 100, each with an equal 1% chance.
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How to use the random number 1–100
- Tap Generate or press the space bar.
- To draw several different numbers, increase How many and turn off repeats.
Fair and private
flipj uses your browser's built-in cryptographic random number generator (crypto.getRandomValues), the same source browsers use for encryption keys. We also avoid "modulo bias", a subtle flaw where some results come up slightly more often than others. Every result is generated on your device, so nothing you enter is sent to us.
Ideas for 1 to 100
- Guess the number: one person generates, everyone else guesses with "higher" or "lower" hints. It never takes more than 7 guesses with the right strategy.
- Raffles with up to 100 tickets.
- Percentile rolls in tabletop games (a d100).
Questions
How many guesses does it take to find a number from 1 to 100?
At most 7, if you always guess the middle of the remaining range (a binary search).
Is 1 to 100 the same as rolling a d100?
Yes. A d100 roll is a random whole number from 1 to 100.
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