What this tool does
Roll any dice expression in standard notation: 2d6 for two six-siders, 1d20+5 for a d20 with a bonus, or combinations like 2d8+1d4-1. Every individual die result is shown along with the total.
How the randomness works
Each die is rolled independently from a cryptographically seeded generator with exactly equal odds on every face - our automated tests continuously verify d20 uniformity. Notation supports up to 200 dice with up to 10,000 sides each, which covers every tabletop system we know of and then some.
Read more about fairness and receipts on RandomEveryth.ing.
When to use it
- Tabletop RPG sessions when the dice bag is at home
- Board games with lost dice
- Probability demonstrations in the classroom
- Settling anything a d20 can settle
Frequently asked questions
- What notation is supported?
- Any signed combination of NdM terms and integer modifiers: 2d6, d20 (count defaults to 1), 3d6+2, 1d20+1d4-1. Weird dice like d3 and d7 work fine.
- Are these rolls really fair?
- Yes - every face has an exactly equal chance, verified by chi-square tests in our automated suite, and each roll comes with a replayable fairness receipt.
- Can I see each die, not just the total?
- Yes. Results show every individual die grouped by term, plus modifiers and the grand total.