Compare real unit profiles
Choose an attacker, weapon profile, target unit, and the number of models involved.
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Battle analysis
Damage Calculator
Compare units, apply battlefield modifiers, and estimate expected damage before the dice are rolled.
- 1. Attacker
- 2. Defender
- 3. Results
Attacker
Select attacking unit & weapon
Choose a faction, then select the unit and weapon making the attack.
Defender
Select target unit
Choose the target unit whose defences you want to test.
Combat calculator guide
Plan your Warhammer 40k attacks before the dice are rolled.
GrimSlate's Warhammer 40k damage calculator helps you compare weapon profiles against real unit datasheets. Select an attacker and defender, then use the result as a quick tactical reference for target priority and expected damage.
Follow the attack sequence
See expected hits, wounds, failed saves, damage, kills, and wipe chance in one place.
Account for modifiers
Include re-rolls, cover, invulnerable saves, Feel No Pain, and common weapon abilities.
Frequently asked questions
What does the Damage Calculator estimate?
It estimates average results for a selected weapon against a selected target: hits, wounds, failed saves, damage, expected models destroyed, and wipe chance.
Does it use fixed dice results?
No. The calculator uses probability averages, so its output represents the expected result across many similar attack sequences rather than a guaranteed outcome.
Can I include battlefield and weapon modifiers?
Yes. You can apply common modifiers such as re-rolls, hit and wound changes, cover, stealth, invulnerable saves, Feel No Pain, and supported weapon abilities.