Weapon damage: calculation order and caps

Base damage and additive bonuses#

First roll a whole-number base weapon damage B between its minimum and maximum. The support bonuses are Strength ×0.3%, Anatomy ×0.5%, Tactics ×0.625%, and the eligible harvest skill ×0.2%. Strength and Anatomy each gain another 5 percentage points at 100; Tactics gains 6.25; Mining or Lumberjacking gains 10.

The equipment Damage Increase term is added to supported spell bonuses and penalties, then capped at 100%. That capped term joins the support bonuses; it does not cap them. The result is truncated to a whole number. See Combat support: Anatomy, Tactics, Mining and Lumberjacking for eligibility.

A second bonus stage#

Ability damage scalars, a qualifying slayer, Enemy of One, pack instinct and other explicit effects contribute to a separate percentage-bonus pool. The current code caps that pool at +300%, then multiplies damage by (100 + pool) ÷100. Its maximum factor is therefore 4× at this stage. This is not a cap on the total multiplier across every stage.

A weapon slayer adds 100 points to this pool. Enemy of One adds 50 against the selected creature type; other creature types attacking the affected player add 100. Double Strike subtracts 10 points from this pool.

Then defence and side effects#

• Weapon-specific and creature-specific damage hooks can adjust the result.
• Parry can set the normal weapon hit to zero. Otherwise an armor location is selected for durability wear.
• Damage types are selected; Consecrate Weapon can move all damage into the defender’s weakest resistance.
• The elemental resistance calculation is applied unless an applicable Armor Ignore effect bypasses it.
• Damage that survives reaches health; successful damage then enables leech and weapon hit-property rolls. Summon strength, creature abilities, encounter mechanics and pet-level hooks can alter particular cases.

Why a tooltip cannot predict every hit#

A Damage Increase value is neither a final-hit percentage nor a universal damage cap. Integer rounding happens at several stages, and special attacks can use separate damage paths.