Rules overview
How to roll Call of Cthulhu 7E dice
Enter your skill value and select any modifiers (Bonus or Penalty dice), then roll. Our CoC dice roller automatically calculates Hard (half skill) and Extreme (one-fifth skill) success levels, making it easy to determine your roll outcome.
Key mechanics
- d100 percentile system
- Hard & Extreme successes
- Bonus & Penalty dice
- Sanity & Luck mechanics
- Automatic success calculation
- Visual dice display