How to Use the Hit vs Evasion Probability Calculator
Looking at accuracy and evasion separately makes it easy to lose track of what the real chance of landing a hit actually is. This calculator takes accuracy, evasion, damage per hit, and attacks per second, then combines the two rates into a real hit chance and the expected DPS (damage per second) that follows from it.
The formula multiplies accuracy by the chance evasion fails, which is 100% minus the evasion rate. For example, 80% accuracy against 20% evasion gives a real hit chance of 80% x (1 - 20%) = 64%. Multiplying that real hit chance by your damage and attack speed gives the average DPS you can expect over time.
When you're deciding whether to invest in more accuracy or an evasion-piercing effect from gear or skills, plug different values into this calculator and compare the resulting expected DPS directly. Against a high-evasion opponent, your real hit chance can drop sharply unless you push accuracy up significantly.
Frequently Asked Questions
This calculator computes the real hit chance as accuracy multiplied by (1 minus evasion). For example, with 80% accuracy and 20% evasion, the real hit chance is 80% x (1 - 20%) = 64%.
With this formula, the hit chance never drops to zero unless evasion is exactly 100%. Higher evasion does sharply reduce the real hit chance though, so it can feel like you're barely landing hits at all.