Free tool
Online dice roller
A d100 against a skill’s value, with bonus or penalty dice and the success level. And every die from D3 to D100 for damage. The dice roll in 3D, in your browser, no account needed.
Skill roll (d100)
- Success
- ≤ 50
- Hard
- ≤ 25
- Extreme
- ≤ 10
Enter the value, then roll.
Free dice: damage, D6, D20…
Choose a die and how many.
How to read a d100 roll
Roll two ten-sided dice: one for the tens (00 to 90), one for the units (0 to 9). 00 and 0 make 100. The roll succeeds if it is equal to or below the skill’s value.
Success levels
The lower the result, the better the success. A hard success needs half the value or less, an extreme success a fifth or less. With 60 in Library Use: 60 or less succeeds, 30 or less is a hard success, 12 or less an extreme success.
Bonus and penalty dice
When circumstances help the investigator, roll one extra tens die and keep the lowest: that is a bonus die. When they hinder, keep the highest: that is a penalty die. A bonus die and a penalty die cancel out.
The other dice
Weapon damage, sanity loss and luck use the other dice: 1D3 for a punch, 1D6, 1D8 or 1D10 for a weapon, 2D6 and more for creatures. A D3 is a D6 halved, rounded up.
Going further
Run the whole game with Grimoire
These tools are pieces of Grimoire, the keeper’s companion: the story scene by scene, the players’ sheets on their phones, the dice, combat and an ambiance screen for the table.