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The Math Behind Game Balance

DPS, effective HP, drop rates and XP curves — free calculators every game designer reaches for.

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DPS (Damage Per Second) Calculator

Effective DPS from hit damage, attack speed, crit chance and crit multiplier — the core combat-balance number.

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Effective HP (EHP) Calculator

True survivability from raw HP plus damage reduction (armor/resist) — why 50% reduction doubles your effective health.

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Drop Rate / Expected Tries Calculator

Probability of at least one drop in N tries, expected tries to get one, and the 'pity' attempt count.

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XP Curve & Level Cost Calculator

XP required for a level and total cumulative XP under linear, polynomial or exponential progression curves.

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Time-to-Kill (TTK) Calculator

How long to kill a target from your DPS and its effective HP — the metric that defines a shooter's feel.

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Crit Chance vs Multiplier Optimizer

Compare investing in crit chance vs crit damage to maximize expected damage — finds the better next point.

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