The formula for damage reduction is
(4 × level)%, meaning for every additional level another 4% of damage is absorbed. The highest level (Protection IV) will absorb 16% (
4 × 4%) of damage. Theoretically at level 25 no damage is possible (because it would transcend 100%), but because the damage to be absorbed is capped at 80%, the maximum efficient level would be 20.
Protection, Blast Protection, Fire Protection, and Projectile Protection are mutually exclusive.[Bedrock and Legacy Console editions only][upcoming: JE 1.14.3] However, if commands are used to have two or more of these enchantments on the same item, the effects will stack.
|1.14||?||Protection enchantments are no longer mutually exclusive.|
|Upcoming Java Edition|
|1.14.3||pre2||Protection enchantments are again mutually exclusive.|
|Pocket Edition Alpha|
|0.12.1||build 1||Added Protection|