Combat calculator

How it is worked out

Chance to hit (melee)

35 + melee attack − melee defence, kept within 8–90%

Source: _kv_rules: melee_hit_chance_base, _min, _max; the wiki's Combat page

Armour

blocks a random share of base damage between half the armour and the full armour (as %), never more than 100%; armour-piercing damage and explosions ignore it. Above 100 armour the average rises by 0.25% a point up to 100% at 200.

Source: _kv_rules: armour_roll_lower_cap = 0.5; the game's weapon-strength description; the wiki's Combat and Armour pages

Bonus vs large / infantry

adds its value to melee attack and to weapon damage, split between base and armour-piercing like the weapon's own; large targets are those bigger than a man on foot (cavalry count)

Source: the wiki's Statistics page; entity size from battle_entities

Charge bonus

adds its value to melee attack and damage (split the same way) when charging; it fades over 13 s, so this is the first blow

Source: the game's charge-bonus description; _kv_rules: charge_decay_duration; the wiki's Charge Bonus page

Resistances

add up and cap at 90%: ward save (all damage), physical (not against magical attacks), missile (missiles only), fire resistance or weakness (flaming attacks only)

Source: _kv_rules: ward_save_max_value; the wiki's Damage channel page; CA on Warhammer III's magical attacks

Checked against the wiki's worked examples (Temple Guard against Rat Ogres, the Swordsmen charge, fire weakness) and the game's constants in _kv_rules.

What it leaves out

• Time in melee: how often a model swings depends on its animations and how many models reach the fight, so the calculator counts hits and attacks, not seconds.
• Missile accuracy, range and cover: the missile numbers assume every shot hits, so they are the best case.
• Impact damage of a charge, mass, knock-downs, splash attacks of big monsters, bracing against charges.
• Flanking and rear attacks, fatigue, rank, leadership, skills, items, abilities and spells.

Unit numbers: compare units · counters · base stats from the game's tables (WH3-Dump).