What is a dice roller?
A dice roller is a virtual set of dice for when the real ones are missing, or when a game needs dice you don't own, such as a d20 or percentile dice. It's used for Ludo, snakes and ladders, Monopoly, Catan, role-playing games, classroom probability lessons and quick decisions.
Choose up to ten dice and their number of sides, press Roll, and the faces and total appear. Six-sided dice are drawn with pips like real ones. Your recent rolls stay listed until you leave the page.
How to use the Dice Roller
1.Choose the dice
Pick how many dice and how many sides each has.
2.Roll
Press Roll. Six-sided dice show pips; others show the number.
3.Check the history
Your last twelve rolls are listed, handy for settling disputes.
Example: the odds with two dice
Rolling two six-sided dice (2d6):
- Possible outcomes
- 36
- Ways to make 7
- 6 (16.7%)
- Ways to make 2 or 12
- 1 each (2.8%)
- Average total
- 7
Over many rolls the totals pile up around 7, which is what the history list shows if you roll enough.
Fair rolls and the odds
Each die is rolled with your browser's cryptographic random generator, with every face equally likely. In a test of 60,000 rolls of one d6, each face came up close to the expected 10,000 times.
With two six-sided dice, totals aren't equally likely: 7 can be made six ways out of 36, so it comes up about 16.7% of the time, while 2 and 12 each come up once in 36. That's why board games put their important spaces on sevens.
Frequently asked questions
Is an online dice roller fair?
This one is: each roll uses a cryptographic random number with every face equally likely, and past rolls don't affect the next.
What is a d20?
A twenty-sided die, used in Dungeons & Dragons and other role-playing games. d4 to d100 are all here.
What's the most likely total with two dice?
Seven, with a 1 in 6 chance.
Can I roll different dice together?
Roll each kind separately and add the totals; a single roll uses one kind of die.
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