Roll the dice
Roll 1 to 10 dice online. Pick a d4, d6, d8, d10, d12, d20 or d100, or any sides from 2 to 100, and tap Roll. You see each die and the total. Each die is drawn at random before it tumbles, so every face has the same chance.
Also on iPhone: RandALL
iPhone only for now. These web tools are yours to keep using.
Total ?
Last rolls
- None yet
How it picks
Set the dice, tap Roll, read the total. Here is what happens in between.
- You choose the dice. How many (1 to 10) and how many sides: a shortcut from d4 to d100, or any number from 2 to 100. Add a modifier if your game uses one, like +5 on a d20.
- Every die is drawn first. Each die gets its own number from
crypto.getRandomValues, your browser’s secure random source. Rejection sampling throws away the few raw numbers that would give the low faces an edge, so each face of a d6 has exactly a 1 in 6 chance. - Then the dice tumble. The animation only shows faces that are already decided. A six-sided die is a 3D cube that turns until its number faces you; the others flash numbers and stop on theirs. Tapping fast or slow changes nothing.
- You get every die and the total. The modifier is added once, to the total. Your last 8 rolls are kept in this browser only.
Tested. In 100,000 test rolls each of a d6, a d20 and a d100, every face came up evenly (chi-square test).
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Questions
Is this dice roller fair?
Yes. Each virtual die is its own draw from your browser’s secure random generator, with rejection sampling so no face gets a rounding edge. The faces are decided before the animation starts, so how or when you tap can’t change them.
How do I roll a d20?
Tap d20 under Sides, set Dice to 1 and tap Roll. If your roll has a bonus, set the modifier, for example +5, and it is added to the total.
What does 2d6 or 1d20+5 mean?
It is dice notation. The number before the d is how many dice, the number after it is how many sides, and a plus or minus at the end is added to the total. So 2d6 is two six-sided dice, and 1d20+5 is one twenty-sided die plus 5. Put it at the end of this page’s address, like /dice-roller/#1d20+5, and the page opens with those dice.
What are the odds of rolling a 7 with two dice?
1 in 6. Two six-sided dice can land 36 ways, and 6 of them add up to 7 (1 and 6, 2 and 5, 3 and 4, each both ways round). That makes 7 the most likely total. 2 and 12 are the least likely, 1 in 36 each.
Can I roll a die with any number of sides?
Any number from 2 to 100. Type it in the box under the shortcuts. A d2 works like a coin, and a d100 gives a number from 1 to 100, which is what a percentile roll needs.
Can I roll more than one die at once?
Yes, up to 10, all with the same number of sides. Each die is rolled on its own, and you see every die and the total. Your last 8 rolls stay in the panel.
Is there a dice app for iPhone?
Yes, RandALL. It throws 3D dice that bounce and land by real physics, and you can shake your iPhone to roll. RPG dice gives one-tap throws from d4 to d20. Your first 24 hours are free, with every tool.
Take it with you
RandALL for iPhone has 25 tools in one app: wheels and teams, real 3D dice, random alarms, Finger Picker and more. It works offline.
Your first 24 hours are free, with every tool. After that, subscribe or buy the lifetime unlock once. Family Sharing included.
Get it on the App StoreiPhone only for now. These web tools are yours to keep using.
