2*head armor weight + body armor weight + leg armor weight + 4*hand armor weight -

10 . You are you actually losing 0,9% of your WPF with your build

(From the game mechanic thread:

Armor weight

Armor weight modified proficiency = base proficiency * (1 - 0.01 * effective armor weight)

Effective armor weight = 2*head armor weight + body armor weight + leg armor weight + 4*hand armor weight - 10

(Source: WaltF4, updated 31.7.2012 based on the new formula)

This means that every point of armor weight with helmet weight multiplied by 2 and glove weight multiplied by 4 over 10 reduces your wpf by 1%. Or the same put other way, any effective armor weight from the above equation reduces your wpf 1% per 1 point. )