Lost the dice for a board game, or need a d20 for a role-playing session? Roll up to six virtual dice at once, with 4, 6, 8, 10, 12 or 20 sides, and see each result plus the total. Free, works on phone and computer, no sign-up.
How it works
Each die is rolled separately with your browser's cryptographically secure random generator (crypto.getRandomValues) and rejection sampling, so every face is exactly equally likely: 1 in 6 on a d6, 1 in 20 on a d20. Dice are independent of each other and of earlier rolls. With several dice the total is not evenly spread: on two d6 a total of 7 can be made 6 ways out of 36 (about 16.7%), while 2 or 12 can each be made only one way (about 2.8%). That is why 7 comes up so often in games. The roll runs entirely in your browser.
Worked example
A board game asks you to roll two six-sided dice. Choose 2 dice and d6, then press Roll: you get a 4 and a 5, total 9. The chance of a total of 9 with two d6 is 4 in 36 (11.1%), from 3+6, 4+5, 5+4 and 6+3. For a role-playing attack, switch to 1 die and d20: every number from 1 to 20 has a 5% chance.