Arqade is a question and answer site for passionate videogamers on all platforms. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

As far as I can tell, it's something like this:

damage reduction = armor / (armor + 100)

Is this accurate?

share|improve this question

Yes, that's correct. The calculations are:

Armour Resist: Damage Reduction = Total Armor / (100 + Total Armor)

Magic Resist: Damage Reduction = Total Magic Resistance / (100 + Total Magic Resistance)

share|improve this answer
And despite what it might seem, Armor does not have diminishing returns. – Raven Dreamer Aug 16 '10 at 22:36
@Raven: That's true, but it's important to remember that a lot of armor is not better than a mix of armor/hp. Because armor boosts your survivability by a percentage of your hp, and most hp items give a flat hp boost, it's often better to buy hp once you have significant armor. I'm sure you already know this, I'm just leaving it here for any other readers. – Matthew Pirocchi Aug 19 '10 at 17:04
@Raven Dreamer I would love for you to explain how Armor doesn't have diminishing returns. As is clearly stated in the formula, it does have diminishing returns. A diminishing return means that the more armor you add the less damage is reduced for each point of armor. – Steven Oxley Nov 3 '10 at 19:47
@Steven Oxley -- you're looking at it from the wrong perspective. While the amount of armor required per point of %damage reduction does increase (the diminishing returns you're seeing), the effectiveness per point of armor doesn't decrease. I'd open a new question if you'd like to know more -- comments aren't really suited to the indepth explanation a fuller answer would require. Please don't condescendingly assume I don't know what "Diminishing Returns" mean. – Raven Dreamer Nov 3 '10 at 19:54
@Raven Dreamer… Explain away. I didn't mean to be condescending. I was just making sure we had a definition of "Diminishing Returns" to work off of. – Steven Oxley Nov 4 '10 at 16:24

When it comes to reduction It is indeed diminishing, but when You work out the formula for Ehp (Estimated hp) 1 point of armor actually always gives 1 additional % of hp based on the base hp.

share|improve this answer
EHP is 'effective HP', i.e. the amount of damage you can soak up. – Catalept Jun 12 '12 at 3:45

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.