# How does the armor value work?

I have 114 armor right now, but I don't really know what that actually means. By how much does this reduce the damage I take? Is the armor value substracted from incoming damage, or is it some kind of proportional reduction of damage?

At the moment I only know that higher values are better, but the details would be rather useful to know so I can make an informed decision between light, medium and heavy armor.

How exactly does the armor value reduce damage, what is the formula?

Because sadly nobody felt like answering this question despite the 100 point bounty I had to torture Geralt in the name of science and let some low-level nekars beat him up in various stages of undress.

I recorded the numbers in a spreadsheet and came to the following conclusions:

1. The damage formula is `Damage = (inital_damage - armor) * (1 - resistance)`
2. Humans and non-humans (elves, dwarfs...) do "slashing", "piercing" or "bludgeoning" damage, depending on their weapon
3. Monsters do "monster" damage (only witcher gear provides a percent-resistance against this)

Example:

1. You are wearing armor parts which combined give you 200 defense and 20% bludgeoning resistance.
2. A bandit hits you with a mace. The attack has an attack power of 1000 bludgeoning damage.
3. First, your armor is subtracted, leaving 800 damage.
4. Then the resistance is applied which further reduces the damage by 20% (160 damage).
5. Your final vitality loss is 640 points.

When you are interested in the gory details, here are the numbers which lead me to these conclusions. Test setup: Level 18 Geralt vs. Level 9 Nekars east of Lurtch in Velen.

Numbers:

``````Setup       Naked
|   My best stuff
|   |   Formal Attire
|   |   |   Griffin Witcher Set (no boots because I accidently sold them))
|   |   |   |   My best shirt only
|   |   |   |   |   My witcher shirt only
|   |   |   |   |   |
Armor       0   200 4   148 92  90
Blunt res   0   42  0   5   30  5
Slash res   0   47  0   17  30  10
Pierce Res  0   12  0   8   0   5
Monster res 0   0   0   24  0   15

Numbers     358 161 389 185 206 250
366 168 326 154 286 205
331 143 331 137 265 233
354 166 378 141 266 238
332 160 343 147 250 210
364 131 380 150 243 218
329 178 332 142 272 246
385 123 378 160 297 250
390 145 369 159 263 219

Average:    360 150 358 152 260 229

Expected:       156 356 158 264 226
``````

I am aware that a sample size of 9 numbers per test setup is not a lot, but the numbers still match the formula above quite well.

## What does this mean for equipment selection?

• The stronger the enemy is hitting, the more important does damage resistance become
• When fighting monsters, resistance against monster damage can be more important than high defense, so it might be worth keeping a witcher set even when its defense is lower than mundane gear.
• Thank you for doing all of this. I'm actually studying various implementations of equipment armor for my game project. I appreciate your work. Commented Jul 29, 2018 at 5:48
• Is there any type of damage (call it, say, vanilla damage) that is mitigated by the Armor number but is not then subject to piercing, bludgeoning, slashing, or monster resistance? Or does all non-elemental damage fall into one of those four categories?
– dg99
Commented Aug 31, 2018 at 19:52
• "For science.." Commented Oct 11, 2019 at 15:57

There has been actually a lot of debate in the past (regarding Witcher 2) about this formula.

After some research I found out that

Damage Taken = Damage - Armor

So if you have 100 (picking 100 for an easy to grasp number) Armor and the enemy strikes with a 200 Damage attack. You get hit by 100 Damage.

According to this discussion Damage Reduction also comes into play and calculates based off your armor. So if you have 100 Armor and that armor has 20% Damage Reduction. Then effectively you will "have" 120 Armor.

I'm assuming the system still works the same. Because this kinds of things are hard to find out.

If I find anything out I will update my answer with findings if relevant.

• This answer only applies to witcher 2. There is no reason why the formula could not be different in witcher 3. Commented Sep 16, 2015 at 16:13
• Also, the question specified that it's about Witcher 3, not the Witcher series Commented Sep 17, 2015 at 16:17