Every Die in the Bag

Pick a die

A standard D&D set holds seven dice: the d4, d6, d8, d10, d12, d20, and a second d10 marked in tens for percentile rolls. Each one has a page below with its own roller and a short account of where the game uses it. If you want everything at once, the main roller takes any mix of dice, modifiers and saved lists.

Rolls that are not one die

• Stat roller: 4d6, drop the lowest, six times. The classic way to make a character.
• Advantage and disadvantage: two d20s, keep the higher or the lower.
• Dice notation roller: type 2d6+3 or 4d6kh3 and it rolls exactly that.
• Dice calculator: the average and odds of any roll, with the whole curve drawn.

What each die rolls

The average of any die is half of one more than its sides: a d8 averages (8 + 1) / 2 = 4.5. Add the averages to get the average of a pool, so 8d6 for Fireball averages 28.

Hit dice by class

The hit points roller rolls them at level-up and shows whether rolling beats taking the average.

Questions

What dice do you need for D&D?

One set of seven: a d4, d6, d8, d10, d12, d20 and a percentile d10 marked 00 to 90. That covers every roll in the rules. Many players add a few extra d6s for Fireball and Sneak Attack, and a second d20 for advantage.

How many dice are in a D&D set?

Seven. The two d10s look alike, but one is marked 0 to 9 and the other 00 to 90, so together they make a d100.

What does d20 mean?

A twenty-sided die. The number after the d is the number of sides, and a number in front says how many to roll: 3d6 is three six-sided dice added together. The Dice Notation Guide covers the rest.

Which die is used most in D&D?

The d20. Every attack roll, saving throw and ability check is a d20 plus a modifier against a target number. Damage and healing use the smaller dice.

How do you roll a d100 with two d10s?

Roll both and read the tens die first, then the units: 70 and 3 is 73. A 00 and a 0 together read 100, never zero, so every result from 1 to 100 is exactly 1%. The d100 roller does it in one tap.

Are online dice fair?

These are. Each roll comes from your browser's cryptographic random number generator, with no bias towards any face, so every side of every die is equally likely.