Calculators & Generators

Random Number Generator

Pick a range and how many numbers you need, then press Generate.

By TheCalcTools Updated Formula checked and tested
Your numbers
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Random Number Generator by TheCalcTools

How the Random Number Generator works

Set the minimum, maximum and count. With no repeats, each number can appear only once, like drawing raffle tickets from a hat; with repeats allowed, each draw is independent, like rolling a die.

Numbers come from your browser’s cryptographic random number generator (crypto.getRandomValues), the same source used for security keys, and every value in the range is equally likely. Nothing is sent to a server.

Worked example

Minimum 1, maximum 49, 6 numbers, no repeats, sorted: a result might be 3, 11, 19, 27, 38, 46. Each press draws a new, independent set.

Frequently asked questions

Is this truly random?

It uses a cryptographically secure pseudo-random generator seeded by your device’s entropy, which is unpredictable for all practical purposes, including prize draws.

Can I pick lottery numbers with it?

Yes: set the lottery’s range, the count and no repeats. Every combination is equally likely, so no numbers are luckier than others.

Sources and further reading

Dice Roller (d4, d6, d8, d10, d12, d20)Choose your dice and press Roll Random Name Picker (Winner and List Shuffler)Paste a list, choose how many to pick, and press Pick Lottery Number Generator (Quick Pick)Set your lottery's format and draw random lines, like a quick pick Coin Flip Simulator (Heads or Tails)Flip once to decide, or flip many times to watch the law of large numbers Password Generator (Strong, Random, Private)Choose the length and character types; a new password appears instantly Random Team GeneratorPaste the players, choose the number of teams and press Make teams

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This calculator gives estimates for information only. Check important results independently before you rely on them. See our disclaimer.