Armour is a rating that measures a character's physical damage mitigation.
Damage reduction from armour only reduces physical damage taken. Elemental damage and damage-over-time are not affected.
The amount of damage reduction is a function of armour rating and the damage taken. Damage reduction is capped at 90%.
Damage Reduction = Armour / ( Armour + (12 * Damage) )
The fact that damage reduction diminishes against more damaging hits means it is difficult to know exactly how much damage is reduced. As a rule of thumb, to achieve 50% damage reduction you will need an armour rating equal to twelve times that of the damage taken in a single hit. For example, 50% damage reduction against a 100 damage hit requires 1200 armour rating.
For example, if you have 1200 armour rating this chart indicates how much damage will be reduced by:
The vertical axis is damage reduction percent. The bottom axis is original damage.
There are passive skill nodes that grant additional evasion or a combination of bonuses including evasion.
These passives increase armour rating by a percentage.
|File:Passive-armourandevasion.png||Armour and Evasion|
|File:Passive-leatherandsteel.png||Leather and Steel|
|Armour and Energy Shield||
|Body and Soul||
These passives are related to armour, but don't fit into any other category.