Random Number Generator 1–3
One click gives you a fair random number from 1 to 3 — every value has exactly a 1-in-3 chance. Built for quick three-way picks: rock-paper-scissors style decisions, choosing between three options, or assigning three players an order. The From/To fields let you switch to any other range on the spot.
How the pick works
The generator asks your browser's cryptographic random source (crypto.getRandomValues) for a value and maps it uniformly onto 1…3, so every outcome has probability exactly 1/3 — no pattern, no memory of previous picks.
Independence is the point: a number is never "due". Each click is a fresh draw, like a fair die that can't remember what it rolled before. Everything runs locally in your browser.
Worked examples
Example 1: picking one of three restaurants
The classic 1–3 use case, done fairly.
- Map each option to a number: 1 = pizza, 2 = sushi, 3 = tacos.
- Generate one number from 1–3 and commit to the result.
A fair pick nobody can argue with.
Example 2: generating several at once
You need a handful of values from 1–3.
- Set "How many" to the count you need.draws are independent — repeats can occur
- Copy the list with the Copy button.
A batch of independent draws, like rolling the same die repeatedly.
FAQ
Is every number from 1 to 3 equally likely?+
Yes — the draw is uniform: each value has probability exactly 1/3, verified by the mapping from the browser's cryptographic generator.
Can the same number come up twice in a row?+
Of course — independent draws have no memory, and back-to-back repeats happen with probability 1/3. A repeat is evidence of fairness, not brokenness.
Can I use a different range?+
Yes — edit the From and To fields for any whole-number range (negative numbers included), or tap the preset chips for the common 1–3 through 1–100 ranges.
Is this fair enough for raffles and giveaways?+
For informal draws, absolutely — cryptographic randomness is stronger than dice. For regulated lotteries you'd need an audited process, which no browser page provides.
Related calculators
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