RPG Damage Per Second (DPS) Calculator
Compute a build's damage per second from hit damage, attack speed and crit, then see the effective damage after mitigation.
How it works
Avg hit = damage × (1 + crit chance × (crit mult − 1)) · DPS = avg hit × attacks/s × (1 − mitigation)
DPS folds three levers into one sustained damage number: how hard each hit lands, how often you hit, and how much critical strikes add on top. Crit is a weighted average — a 25% chance to deal double damage adds 25% to your average hit, not 100% — which is why crit chance and crit damage must be multiplied together to compare builds fairly. Applying the target's damage reduction last turns raw DPS into the effective DPS you will actually see against a defended enemy.
Worked example
150 damage at 1.5 attacks/s with 25% crit at ×2: average hit is 150 × (1 + 0.25 × 1) = 187.5, raw DPS is 187.5 × 1.5 = 281.25. Against a target with 20% reduction, effective DPS is 281.25 × 0.8 = 225.
Frequently asked questions
How does crit affect average damage?
Crit adds crit chance × (crit multiplier − 1) to your average hit. A 25% chance at ×2 adds 0.25 × 1 = 25%; a 50% chance at ×2 adds 50%. Chance and multiplier scale together, which is why balancing both usually beats stacking one.
Why apply mitigation separately?
Damage reduction from armour or resistances scales the final number, not your stats. Keeping it separate lets you see your build's raw output and how much a defended target eats into it.
Does higher attack speed always win?
Not necessarily — it multiplies DPS, but many games tie resource cost, on-hit effects or animation locks to attack speed, and some abilities scale better with big single hits. DPS is a baseline, not the whole picture.
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This calculator is for educational purposes. Double-check important results before acting on them.