How to use it
- Choose how many dice to roll, from 1 to 6.
- Pick the type of die: d6 for board games, or d4, d8, d10, d12 or d20 for role-playing games.
- Press Roll, tap the dice or press Space. Each die lands in turn and the total appears below.
- Your previous rolls are listed in the panel, written like “3 + 5 = 8 (2d6)”.
Dice whenever you need them
Lost a die from the board game box? Playing over a video call? Running a role-playing session and the d20 keeps rolling off the table? A virtual dice roller solves all of it: pick the dice, roll, and read the total. It works on any phone, needs no app and can’t be loaded.
Board games and family games
Most board games use one or two ordinary six-sided dice. Set the number of dice, keep the type on d6 and roll. The total is added up for you, which helps younger players and speeds up games like Monopoly, Parcheesi or Snakes and Ladders. For games like Yahtzee, choose five dice and roll them all at once.
Role-playing games
Tabletop RPGs use a whole set of dice with different numbers of faces, written d4, d6, d8, d10, d12 and d20. Choose the type and how many you need. For example, 1d20 for an attack roll, then 2d6 for the damage. The history panel keeps your last rolls in standard notation, so the whole table can check them.
How the dice are rolled
Each die is rolled with crypto.getRandomValues, the cryptographically secure random generator in your browser, with a method that avoids the small bias simple generators have. So every face really has the same chance. The results are fixed the moment you press Roll. The tumbling animation shows random faces while the dice “roll”, and then each die lands on its real result, one after another.
We check the dice with automated tests on every update: a single d6 must show each face about one sixth of the time, a d20 must show each face about 5% of the time, and with two d6 the total of 7 must be the most common.
Dice in the classroom
Dice are great for teaching probability. Roll two dice 50 times as a class and write down each total, then compare the results with the 36 possible combinations. Why is 7 more common than 12? You can also use a d20 or a d12 to pick a random question from a numbered list, or a d4 to choose one of four groups.
Frequently asked questions
Are these online dice fair?
Yes. Every die is rolled with your browser’s cryptographic random number generator, so each face has exactly the same chance, a 1 in 6 chance on a d6 and 1 in 20 on a d20. Automated tests roll the dice more than 100,000 times and check the results. Real dice can be slightly unbalanced by rounded edges or uneven drilling; virtual dice can’t.
What do d4, d6, d8, d10, d12 and d20 mean?
The “d” means die and the number is how many faces it has. A d6 is the ordinary cube, numbered 1 to 6. The others come from role-playing games such as Dungeons & Dragons: a d20 is used for most checks and attacks, and the rest for damage and other rolls.
What does “2d6” mean?
It is dice notation: roll two six-sided dice and add them up. “3d8” means three eight-sided dice. The history panel uses the same notation, so you can see at a glance what you rolled.
Why does 7 come up so often with two dice?
Because there are more ways to make 7 than any other total: 1+6, 2+5, 3+4, 4+3, 5+2 and 6+1. That is 6 of the 36 possible combinations, or 1 in 6. Totals of 2 and 12 can only be made one way each, so they are the rarest.
Can I roll more than six dice?
The roller shows up to six dice at once so every die stays big and easy to read on a phone. For larger pools, roll several times and add the totals from the history.