Armor class is the most important aspect of any protective armor in EFT. Armor class represents how effective the armor is at stopping incoming rounds with varying levels of ballistic effectiveness. Armor classes range from 1-6. The higher the class, the better the armor.
When it comes to armor durability, it's important to remember how the displayed fraction, in the bottom right of the armor, actually works. The number on the left side is your armor's current durability. The number on the right is the armor's max repairable durability. When determining how effective your armor is at stopping a round, you must compare the armor's current durability on the left with the armor's maximum durability. The armor's maximum durability can only be found by purchasing a new armor piece from a vendor- excluding Fence.
Divide your armor's current durability by the armor's maximum durability to get your armor's integrity. For example, if you have an armor piece that reads 30/45, but the armor's maximum durability is 50, you actually possess armor that is 30/50; therefore that armor's integrity is at 60%.
Armor destructibility is directly related to an armor pieces material- and each material has it's own destructibility percent.
Aramid - 25%
Polyethylene - 45%
Combined Materials - 50%
Titanium - 55%
Aluminum - 60%
Armored Steel - 70%
Ceramic - 80%
Glass - 80%
Armor repair is directly related to an armor pieces material- and each material has it's own repair rate.
Aramid - Good
Polyethylene - Very Good
Combined Materials - Average
Titanium - Good
Aluminum - Good
Armored Steel - Very Good
Ceramic - Bad
Glass - Bad
Step 1
Effective durability is calculated by dividing the armors durability by the material destructibility. The higher the effective durability within an armor class, the better the armor.
Armor Durability = AP
Destructibility = De
Step 2
The armor constant is heavily based off of the armors class and takes into account the armors current integrity. To calculate the armors constant, insert the values for integrity, and the armors class. Then solve. To find your armors integrity, divide the armors current durability by its purchased maximum durability.
Integrity = d
Armor Class = c
Step 3
Ammo penetration chance is simply the chance a fired round has to penetrate armor. To calculate the penetration chance, you must first find the armors constant and subtract the rounds penetration chance from it. Then solve the rest of the equation.
Armor Constant = a
Penetration Chance = p