Armor Rating

Armor Rating (also abbreviated as AR) is an antiquated term from Ultima Online's early era. The effectiveness of worn armor (and shield, if held) was once represented by a single number: the Armor Rating. Weapon damage inflicted by an opponent would be modified by the target's AR to calculate the final damage inflicted. This was increased in complexity with the introduction of resistances.

AR was once shown in the Character Status window, but was replaced with the display of resistances.