Combat Calculator
Select an attacking unit and a defending unit to calculate combat outcomes. Search by name or browse the full unit list.
11th edition support is planned.
Select both units to begin
What is MathHammer?
MathHammer is a free Warhammer 40,000 combat calculator that lets you simulate dice roll probabilities — hit rolls, wound rolls, save rolls and damage output — for any unit match-up in Warhammer 40K 10th Edition.
How to Use
Select an attacking unit and a defending unit from the official 40K datasheets, choose your weapon profiles, then hit Calculate to see expected hits, wounds, failed saves and average damage output — both mathematically and via Monte Carlo simulation.
Why MathHammer?
Take the guesswork out of list-building. Compare units, optimise target priority and make data-driven decisions on the tabletop. Perfect for competitive 40K players and hobbyists alike.