Crit Damage Multiplier Calculator

About this calculator

In RPGs, MOBAs and action games, a character’s critical hit chance and critical damage multiplier combine to determine average output over many hits: average damage = base damage × (1 + crit chance × (crit multiplier − 1)). A build with 30% crit chance and a 2× multiplier, for example, deals 30% more average damage than its base number alone suggests.

This calculator computes that average damage and the effective overall multiplier from your base damage, crit chance and crit multiplier stats. It’s a standard tool for game designers balancing itemization and enemy scaling, and for players optimizing character builds in loot-driven games like action-RPGs, deciding whether to stack more crit chance or more crit damage for the best return.