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League of Legends Lethality: Comprehensive Explanation

If you've ever played League of Legends, you've heard of Lethality, but what exactly does it mean?

what is lethality in league of legends

Lethality is a new statistic in League of Legends that replaced flat armor penetration. Before, flat armor penetration directly reduced an enemy's armor by a specific amount. With Lethality, it converts to armor penetration based on the champion's level.

How is Lethality Calculated

The formula to calculate flat armor penetration with Lethality is:

Flat Armor Penetration = Lethality × (0.6 + 0.4 × level ÷ 18)

This means that a champion can have armor penetration ranging from 62% to 100% based on their level and the amount of Lethality from items. Lethality and armor penetration fully align at level 18.

List of Items that Grant Lethality


+12 Lethality
Serpent Fang +12 Lethality
The Collector +18 Lethality
Youmuu's Ghostblade +18 Lethality
Duskblade of Draktharr +18 Lethality
Edge of Night +10 Lethality
Umbral Glaive +10 Lethality
Sanguine Blade +10 Lethality
Prowler's Claw +15 Lethality
Axiom Arc +18 Lethality

What is the difference between Lethality and Armor Penetration?

Lethality is basically flat armor penetration with a different name. It tells you how much of the enemy's armor you can ignore. It's really effective against opponents who aren't wearing any armor items, like squishy champions. For example, if your target has 40 armor and you have 30 armor penetration, their armor is reduced to just 10, making them easier to defeat.

How to Counter Lethality

While lethality builds can be highly effective, there are counter-picks that can undermine their impact. Champions with high sustain, such as Vladimir or Swain, can negate the burst damage that lethality-focused champions rely on. Additionally, champions with crowd control abilities, like Lulu or Alistar, can disrupt their all-ins and provide protection for their team.

Which Champions should build Lethality?

Lethality is typically associated with AD assassins, such as Zed, Talon, and Jayce, who heavily rely on burst damage to assassinate priority targets. However, other champions can also benefit from lethality builds. Nasus, Caitlyn, Varus, Senna, and similar champions can enhance their poke and burst potential with lethality items, allowing them to surprise opponents and gain a considerable advantage.

About the author

Thomas Branderhorst

Just a guy passionate about web design. This hobby also includes 3D modeling, logo making and creating impressive business cards. What begun as a simple pastime, has now transformed into my main gig. 

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