Armor Penetration

How does Armor Penetration/Reduction Work?

Armor Penetration and Armor Reduction are the statistics of a Champion which allows them to counter some or all of a target's armor. All champions have 0 base armor penetration but can increase it with items, runes, or abilities for a few champions.

Armor penetration and armor reduction are applied in the following order:

1. Percentage Armor Reduction ( Jarvan IV's Dragon Strike)
2. Flat Armor Reduction ( Nasus's Spirit Fire)
3. Flat Armor Penetration ( Greater Quintessence of Armor Penetration)
4. Percentage Armor Penetration ( Last Whisper)


Items with Armor Penetration/Reduction

Total Price: 2300
Recipe Price: 1025
// 40 Attack Damage. UNIQUE Passive: +35% Armor Penetration

Total Price: 1337
Recipe Price: 537
// 25 Attack Damage. UNIQUE Passive: Reduces ability cooldowns by 10% and +10 Armor Penetration.

Total Price: 2700
Recipe Price: 563
// 30 Attack Damage, 15 Critical Strike Chance. UNIQUE Passive: 10% Cooldown Reduction and +20 Armor Penetration. UNIQUE Active: Gives 20% movement speed and +40% attack speed for 4 seconds. Attacking enemies with melee attacks increases the duration by 2 seconds to a maximum of 8 seconds. (60 second cooldown)

Total Price: 3000
Recipe Price: 1188
// 200 health, 50 Attack Damage, 10% Cooldown Reduction UNIQUE Passive: 10 armor penetration UNIQUE Passive: Dealing physical damage to an enemy champion reduces their armor by 5% for 4 seconds. This effect stacks up to 5 times.


Last Whisper vs The Black Cleaver

Last Whisper 2300 Gold = 40 Attack Damage + 35% Armor Penetration
The Black Cleaver 3000 Gold = 200 health + 50 Attack Damage + 10 Armor Penetration + 5% * 5 Armor Reduction

Advised Purchasing:
0-40 armour = Youmuu's Ghostblade
40-100 armour = The Black Cleaver
100 armour+ = Last Whisper

*Note, this does not include masteries, runes, or champion abilities.


Some Abilities with Armor Penetration/Reduction

Corki's Gatling Gun fires multiple shots every half second dealing a fifth of his total damage, and shredding the armor of enemies who are under continuous fire.

Nasus unleashes a delayed spirit flame at a location, dealing damage and reducing the armor of enemies who stand on it by 20/25/30/35/40.

Shyvana unleashes a fireball that deals magic damage and melts the target's Armor by 15% for 4 seconds.
Dragon Form: Flame Breath engulfs all units in a cone in front of Shyvana.

Wukong's next attack will deal additional physical damage and will reduce the enemy's armor by 30% for 3 seconds.


Masteries with Armor Penetration/Reduction

+8% Armor Penetration.

+2 / 3,5 / 5 Armor Penetration.

Improves the following Summoner Spells:
Exhaust: Reduces target's Magic Resist and Armor by 10.


Runes with Armor Penetration/Reduction

+1.28 armor penetration

+0.9 armor penetration, +0.62 magic penetration

+2.56 armor penetration

+1.79 armor penetration, +1.4 magic penetration


Comments
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by RIGGOLOL » August 18, 2012 11:57pm | Report

hey, couple of questions... Does Tarics shatter stack with nasus circle thingy and is there a cap for armour pen like with CD reduction?

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by Yuki Artwaltz » April 13, 2013 2:22pm | Report

Belatedly: yes, all the reductions stack, but the percent ones are multiplicative. The only cap, as far as I'm aware, is 0 Armor, but I could be wrong there too.

Also this page is out of date as of Season 3.

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by Meiyjhe » April 13, 2013 2:30pm | Report

God this was outdated, updated the stats

Hmm... Maybe more stuff is outdated, maybe I will have something to do this weekend after all :D


Any questions? Feel free to PM me :D
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by DarkAkumaLord » April 13, 2013 5:27pm | Report

Oh banana man you scouty boy.


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