Roll a d100
A d100 (percentile dice) produces a number from 1 to 100, each with an equal 1% chance, and the average roll is 50.5. At the table it is usually rolled with two d10s: one for the tens and one for the ones, with 00 and 0 read as 100. Use it for Wild Magic Surges and random tables.
d100 odds and average
Minimum 1, maximum 100, average 50.5. Every face has a 1% chance on a fair die.
| Roll | Chance of exactly this | Chance of this or higher |
|---|---|---|
| 100 | 1% | 1% |
| 96+ | 1% | 5% |
| 91+ | 1% | 10% |
| 76+ | 1% | 25% |
| 51+ | 1% | 50% |
| 26+ | 1% | 75% |
| 11+ | 1% | 90% |
| 2+ | 1% | 99% |
Where you roll a d100 in D&D
Wild Magic Surge: A Wild Magic sorcerer who triggers a surge rolls a d100 on the Wild Magic Surge table to see what happens, from turning blue to casting Fireball centred on themselves.
Random tables: Dungeon Masters use d100 tables for random encounters, treasure hoards, magic items, trinkets and madness effects, because a percentile roll makes it easy to give each result its own likelihood.
How to roll it with two d10s: Roll two d10s of different colours, deciding first which is the tens die. A tens roll of 7 and a ones roll of 3 is 73. A tens roll of 00 and a ones roll of 0 is 100, while 00 and 5 is 5.
Roll a d100 FAQ
How do you roll a d100 with two dice?
Roll two d10s and decide which is the tens die before you roll. Read the tens die first and the ones die second, so 4 and 2 is 42. A 00 on the tens die and a 0 on the ones die is 100.
What is the average roll on a d100?
The average roll on a d100 is 50.5. There is a 50% chance of rolling 51 or higher.
Are percentile dice the same as a d100?
Yes. Percentile dice are two d10s used together to make a number from 1 to 100. A true 100-sided die (sometimes called a Zocchihedron) exists, but most players roll two d10s.
What are the odds of rolling 100 on a d100?
Exactly 1%. Every number from 1 to 100 is equally likely on a fair d100.
Related
Other dice
- 3D Dice Roller
- Roll a d2
- Roll a d3
- Roll a d4
- Roll a d6
- Roll a d8
- Roll a d10
- Roll a d12
- Roll a d20
- Roll a d1000
About this roller
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Contains content from the System Reference Document 5.1 and 5.2 by Wizards of the Coast LLC, used under the Creative Commons Attribution 4.0 International License.