Donning and Removing Armor
When the amount of time required to don or remove armor is a consideration, subtract the armor class from 9 to determine how long it takes to put on the armor: Leather armor (AC 8) can be donned in one round, while banded mail (AC 4) requires five rounds. For any plate armor, if the wearer is putting it on without help, add 2 rounds to this, and add an extra 5 rounds for field plate or full plate. A character putting on full plate armor (AC 0) needs 11 rounds to do it with the help of a comrade, or 16 rounds to do it singlehandedly. Taking off armor can be done in half the time required to put it on - from ½ round for a character to get out of his leather gear, up to 8 rounds for someone to get out of a suit of full plate armor without help. If the character is unconcerned with damaging the armor, cutting straps and so on to speed its removal, this will take no longer than 2 rounds, however the armor must be repaired by a skilled armorer before it can be used again.