Understanding This Calculator
Max hit is the highest amount of damage a hit can deal in a single attack in Old School RuneScape. For melee combat it depends on your Strength level, any strength bonus from equipped gear, active prayers, and your chosen attack style, which all combine through the game’s published max hit formula.
Small changes compound: a strength prayer alone can add several strength levels’ worth of effective strength, while switching to an aggressive attack style adds a flat +3 bonus that stacks with everything else.
- EffStr floor(Strength level × prayer multiplier) + style bonus + 8
- StrBonus strength bonus from equipped gear
This calculator implements OSRS’s publicly documented melee max hit formula (widely published on community wikis); it performs only this factual math and does not reproduce any game text, art, or branding.
Frequently Asked Questions
Why does the formula add +8 to effective strength?
The +8 is a fixed base term in the published melee max hit formula that applies to every calculation regardless of prayers or attack style, ensuring even an unboosted, accurate-style hit has a non-zero effective strength.
Does attack style affect accuracy as well as max hit?
Yes — aggressive, controlled, and accurate/defensive styles also change your effective Attack level for accuracy rolls, but this calculator focuses specifically on the max hit (damage) side of the formula.