D&D Dice Calculator
Dice Roll Statistics
Calculate min, max, average, and probability for standard dice rolls
Advantage / Disadvantage
Calculate the effect of rolling with advantage or disadvantage (D&D 5e)
Ability Score Generation
Statistics for the 4d6 drop lowest ability score method
Formula
Average NdS = N x (S+1)/2 | P(d20 >= target) = (21 - target) / 20 | Advantage P(>= t) = 1 - ((t-1)/20)^2 | Disadvantage P(>= t) = ((21-t)/20)^2
Frequently Asked Questions
What does advantage do in D&D 5e?
Advantage means rolling two d20s and taking the higher result. On average, advantage gives you about a +3.3 to +5 effective bonus depending on the target DC. It's most impactful when you need to roll around 10-11 on the die.
What dice do you need for D&D?
A standard D&D dice set includes: d4, d6, d8, d10, d12, d20, and a percentile die (d100/d10). The d20 is used most often for attacks, saves, and ability checks. Damage dice vary by weapon and spell.
Is 4d6 drop lowest better than standard array?
On average, 4d6 drop lowest produces a total of about 73.5 across 6 scores, which is slightly higher than the standard array total of 72. However, 4d6 has more variance, so you might get scores much higher or lower than the standard array.
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