Roll virtual dice for board games, Dungeons & Dragons and classroom probability: any number of d4, d6, d8, d10, d12 or d20 dice, with a modifier.
For example 3 or -2
2d6: totals from 2 to 12, average 7.
How to use the dice roller
Pick the die: d4, d6, d8, d10, d12 or d20.
Set how many dice to roll and any modifier to add or subtract (use a minus sign, like -2).
Press Roll. You'll see every die, the total, and your earlier rolls underneath.
Totals and averages
Roll
Lowest
Highest
Average
1d4
1
4
2.5
1d6
1
6
3.5
1d8
1
8
4.5
1d10
1
10
5.5
1d12
1
12
6.5
1d20
1
20
10.5
2d6
2
12
7
3d6
3
18
10.5
4d6
4
24
14
With two six-sided dice, 7 is the most likely total: 6 of the 36 combinations add up to 7, so it comes up 1 time in 6 on average, while 2 and 12 each need one exact combination (1 in 36).
Yes. Each die uses your browser's cryptographic random number generator (crypto.getRandomValues) with rejection sampling: random numbers that would make some faces slightly more likely are thrown away and redrawn, so every face has exactly the same chance.
What does 2d6+3 mean?
Roll two six-sided dice and add 3 to the total. The number before the d is how many dice, the number after it is how many sides each die has, and anything after + or − is the modifier.
What's the average roll?
A die with s sides averages (s + 1) ÷ 2: 3.5 for a d6 and 10.5 for a d20. For several dice, multiply by the number of dice and add the modifier, so 2d6+3 averages 10.
Can I roll a d100 or different dice together?
This roller does one type of die per roll. For a d100 (percentile) roll, use the random number generator from 1 to 100.