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Math Calculators

Dice Probability Calculator - RPG Dice Odds & Distribution

Calculate the full probability distribution for any dice roll in XdY+modifier notation. See the chance of rolling at least N, the mean, standard deviation, and a bar chart of outcomes.

Mean: 7.00
Std Dev: 2.415
2
2.78%
3
5.56%
4
8.33%
5
11.11%
6
13.89%
7
16.67%
8
13.89%
9
11.11%
10
8.33%
11
5.56%
12
2.78%

Common RPG Dice Notation

Standard notation: NdS+M where N is the number of dice, S is the number of sides, and M is an optional modifier (positive or negative). For example, 4d6+2 means roll four 6-sided dice and add 2 to the result.