Mechanics overview
Call of Cthulhu 7E dice rules
Roll Call of Cthulhu 7th Edition dice online for free. Our CoC dice roller handles d100 percentile rolls, Hard and Extreme successes, Bonus and Penalty dice, and Sanity mechanics. Perfect for Investigators who need accurate percentile dice rolls.
Quick rules summary
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.
Call of Cthulhu 7E dice FAQ
How do Hard and Extreme successes work?
What are Bonus and Penalty dice?
Do I need to sign up to roll dice?