The un-modified duration of the enchantment as calculated by your attribute rank.
Duration Modifiers (%)
Modifiers are applied sequentially and use "Banker's Rounding" (half-to-even) after each step. Check the box if the modifier comes from an "of Enchanting" weapon to apply the hidden +1s minimum rule.
Optimal Application Orders
Ranked from longest resulting duration to shortest. Calculates all possible sequencing combinations automatically.
References & Formula Sources
GW Wiki: Duration - General rules for condition, hex, and enchantment scaling.
GW Wiki: "Of Enchanting" Weapon Mod - Documents the hidden rule where weapon modifications guarantee at least a +1 second duration increase regardless of the percentage math.
GW Wiki Talk: Blessed Aura - Community testing and mathematical proof that the game engine uses "Banker's Rounding" (half-to-even) for sequential enchantment duration modifications instead of standard rounding.