Choose how many dice and how many sides; change a value to roll again.
About this calculator
This virtual dice roller throws one or more dice with 4, 6, 10, 12, 20 or any number of sides, using a secure random generator, and shows each roll and the total.
Choose the number of dice and the sides per die; change a value to roll again.
When to use it
- Board games when the dice are lost.
- Role-playing games (d20, d12…).
- Classroom probability experiments.
- Quick random decisions.
How to read the result
Each face has the same chance. The average possible total of n six-sided dice is 3.5 × n.
With two dice, 7 is the most frequent total.
Mistakes to avoid
- Thinking a number is “due” after a long wait.
- Using a biased physical die for comparisons.
- Confusing the average with the most likely total.
Formula
Each face has a 1 / sides chance
Worked example
Two six-sided dice: results 3 and 6, total 9.
Frequently asked questions
Are the rolls fair?
Yes, they use your browser’s cryptographic random generator.
What is a d20?
A twenty-sided die used in role-playing games.
What is the average total?
Number of dice × (sides + 1) / 2.
Is it fair?
Yes, each face is equally likely.
What is a d20?
A 20-sided die used in role-playing games.
Why is 7 common with two dice?
It has the most combinations (6 of 36).
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Results are estimates for information only. Check important figures with a professional.