ESO Armor Penetration Calculator
The ESO Penetration Calculator lets you check your total armor penetration against instanced, overland, and dragon enemies, and tells you exactly how much damage you're leaving on the table if you're not capped.
Penetration is one of the most misunderstood stats in the game. A lot of players run Medium Armor in content where they don't have enough penetration and are losing out on a lot of DPS because of it.
Select your group buffs, player sources, and enemy type and it'll show you where you're at.
Major Breach
Minor Breach
Crusher
Alkosh
Crimson Oath's Rive
Tremorscale
Runic Sunder
Crystal Weapon
Anthelmir's Construct
Piercing (CP)
Light Armor
Velothi Ur-Mage's Amulet
Dismember
The Lover (Mundus)
Mace / Maul
Sharpened
Wood Elf Racial
Arena Weapon 1-piece
Splintered Secrets
Force of Nature (CP)
What Is the Penetration Cap in ESO?
Every enemy in ESO has an armor value that reduces the damage they take from your attacks. Instanced enemies in trials, dungeons, and arenas have 18200 armor - this is the penetration cap you need to hit for end-game PvE content. Overland enemies have 9100 armor, and Elsweyr dragons sit at 13650. Once your total penetration equals the enemy's armor value, you're ignoring their armor entirely and dealing full damage. Any penetration beyond that point is wasted.
How to Use This Calculator
Select your enemy type on the right, then toggle on every penetration source that applies to your build and group. Group buffs like Major Breach and Alkosh are typically applied by the tank - check with your group before counting them. The calculator updates in real time and shows your total penetration, how far you are from the cap, and the exact percentage of damage you're currently losing to the enemy's armor.
Group vs. Player Penetration
In an organised group, the tank handles the bulk of the penetration through Major Breach, Minor Breach, and the Crusher enchant. Together these alone contribute over 11000 penetration. As a damage dealer, your job is to cover the remaining gap with your own sources - Light Armor passives, the Piercing champion point, your weapon trait, and any relevant set bonuses. Solo or in a pug group without a tank, you'll need to cover far more yourself, which is where this calculator becomes especially useful.
FAQ
There is no hard cap on penetration itself, but any penetration above the enemy's armor is wasted. Instanced dungeon and trial enemies have 18200 armor, overland enemies have 9100, and dragons have 13650. Arena enemies can vary and sometimes have different Physical and Spell Resistances. Players in PvP can have wildly different armor values depending on their build and buffs, so there is no single penetration target for PvP.
Enemies in ESO have armor that reduces the damage they take. Penetration ignores a flat amount of that armor. For instanced enemies, each point of armor provides roughly 0.0055% damage mitigation, so 18200 armor means about 36.4% damage reduction. If you have 18200 penetration, you ignore all of it and deal full damage.
Penetration comes from group debuffs like Major Breach (5948) and Minor Breach (2974), the Crusher enchantment on your tank's weapon, champion points like Piercing, gear sets, weapon traits like Sharpened, light armor passives, and class abilities. In organized groups, the tank and healer provide a large chunk of your penetration through debuffs.
All your penetration sources are added together into one total. That total is subtracted from the enemy's armor. The remaining armor determines how much damage reduction the enemy has. For instanced enemies, armor provides 1% damage mitigation per 500 armor, so 18200 armor is 36.4% mitigation. Any penetration over the enemy's total armor does nothing.
No. Player Armor grants 1% damage mitigation per 660 Armor and caps at 33000. Monster Armor grants 1% damage mitigation per 500 armor and would technically cap at 25000. This means that without any penetration, instanced enemies have 36.4% damage mitigation, while a player with that same amount of armor would only have 27.6% damage mitigation.
Big thanks to SparkRip for creating a spreadsheet penetration calculator which this calculator is based off of - you can find it here.
THANKS FOR READING
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