What is Lethality in League of Legends and how is it calculated?

Everything to know about one of League’s most prolific armor-shredding stats.

Zed charging forward with his blades coming out of his wrists.
Image via Riot Games

League of Legends has plenty of different statistics that you should know before you start climbing the ranked ladder. In the end, the more knowledgeable you are about the game, the more wins you ought to gather. One pivotal stat is Lethality.

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What is Lethality in League of Legends?

Zed going all-out with a Lethality build on the League of Legends Summoner's Rift map, using his Death's Mark Ultimate leaving a black X on the target.
Champions like Zed benefit from Lethality. Screenshot by Dot Esports

Lethality is a statistic in League that is most closely associated with attack damage champions and their ability to burn through enemy champions’ armor. Lethality was introduced to the game in 2017 as a replacement for the old flat armor penetration system and is not to be confused with the current percentage-based armor penetration mechanic.

With Lethality, champions will gain more armor penetration through various items and builds and no longer rely on their level to increase the stat.

As of Patch 14.1, Lethality essentially functions the same way as flat armor penetration did in the olden days, giving you one armor penetration per point of Lethality. This means that no matter what level you are, you will get the full armor penetration from Lethality items, making this statistic a whole lot stronger in the early stages than it was before. So, if an opponent has 50 armor and you have 20 Lethality, you will deal damage to them as if they had 30, ignoring a flat amount of armor based on how much Lethality you have.

What is the difference between Armor Penetration and Lethality?

Darius swinging his axe in a circle, damaging an opponent and leaving them to bleed on the League of Legends Summoner's Rift map.
Darius is one of the few League of Legends champions to get passive Armor Penetration. Screenshot by Dot Esports

Whereas Lethality lets you ignore a flat amount of an enemy’s armor, the Armor Penetration stat ignores a percentage. So if you were to attack a 50-armor opponent while sporting percentage-based armor pen items such as the Lord Dominik’s Regard with 35 percent, you’d deal damage to them as if they had 32.5 armor. As you can already see, the percentage-based armor penetration has massively diminishing returns the lower the opponent’s armor is, making Lethality the better option in such cases.

However, if you’re up against champions like Malphite, who can stack armor to no end, purchasing a percentage-based armor penetration item is highly recommended, as a 300 armor Malphite would see a whopping 105 armor ignored with just Lord Dominik’s. Add to that a few Lethality items and armor reduction like Black Cleaver’s passive shred, and you’d be absolutely wrecking any enemy, no matter their defenses.

Also, bear in mind that Lethality stacks additively, meaning that if you have two 18 Lethality items, you will have 36 total. However, Armor Penetration stacks multiplicatively. Against a 50-armor opponent, a Darius player wielding Lord Dominik’s and having his E maxed out would do damage as if the enemy had 13 armor, meaning the total Armor Penetration would come out to 74 percent rather than 75. Against a 100-armor opponent, however, it would be 61 percent, diminishing further the more armor an enemy has for the sake of balance.

All Lethality items in LoL

NameStatsCost
Serrated Dirk10 Lethality, 20 Attack Damage1,000 Gold
The Brutalizer5 Lethality, 25 Attack Damage, 10 Ability Haste1,337 Gold
Umbral Glaive15 Lethality, 50 Attack Damage, 10 Ability Haste2,600 Gold
Serpent’s Fang15 Lethality, 55 Attack Damage2,500 Gold
Edge of Night15 Lethality, 50 Attack Damage, 250 HP3,000 Gold
Youmuu’s Ghostblade18 Lethality, 60 Attack Damage2,800 Gold
The Collector10 Lethality, 50 Attack Damage, 25 percent critical strike chance2,950 Gold
Axiom Arc18 Lethality, 55 Attack Damage, 20 Ability Haste3,000 Gold
Profane Hydra18 Lethality, 60 Attack Damage, 10 Ability Haste3,200 Gold
Hubris18 Lethality, 60 Attack Damage, 10 Ability Haste3,000 Gold
Voltaic Cyclosword 18 Lethality, 55 Attack Damage, 10 Ability Haste3,000 Gold
Opportunity15 Lethality, 50 Attack Damage, four percent movement speed boost2,700 Gold
All of League‘s Lethality items and their respective stats.

Best Lethality items in League 

Kha'Zix, a bug-like creature and League of Legends champion, leaps over the wall and slashes at his opponent with two large claws on the game's Summoner's Rift map.
Assassin junglers like Kha’Zix absolutely must build Lethality to be effective. Screenshot by Dot Esports

Hubris

At the moment, Hubris is probably one of the best items in League of Legends proper and not just among the Lethality ones. This Legendary item grants you a whopping 18 Lethality, which is a massive boost in and of itself, though its passive is where the catch is. Each time you kill an opponent, Hubris grants you bonus Attack Damage for 90 seconds, with each subsequent kill increasing this bonus permanently. This is the perfect item for Zed or Samira, as it allows them to use their high AD scaling to wreck enemies no matter how much HP or armor they have.

Youmuu’s Ghostblade

As always, having Youmuu’s in your Lethality build is almost as crucial as carrying Lethality itself on Assassin champions. The movement speed boost it provides is substantial and can help out a ton both in the early and late game, as moving quickly means you can roam, chase, or escape with relative ease. It also gives 18 Lethality, allowing you to go through opponents’ defenses without breaking a sweat.

Axiom Arc

Axiom Arc is a unique item introduced to League in the 2022 preseason. The item gives only 10 Lethality but is mainly taken for its passive effect, which causes your ultimate ability’s cooldown to be refunded by 20 percent every time you get a kill or assist within three seconds of damaging an enemy champion. The item is particularly strong on champions like Zed, Miss Fortune, and Pyke, whose ults are particularly devastating in teamfights. 

The Collector

The Collector is largely a situational item since it executes champions below five percent HP with any basic attack or ability that would bring your target below that threshold. For champions like Sivir, Jhin, Senna, and others whose abilities and attacks can chip away at enemies (and whose ultimates are relatively game-changing), The Collector is a solid choice. 

Best champions to build Lethality on

Pyke phasing through an opponent, leaving a ghost-like trail behind him on the League of Legends Summoner's Rift map.
Pyke’s E will stun for a longer duration based on how much Lethality he has, making him the perfect Lethality champion. Screenshot by Dot Esports

Lethality is a core stat for many champions, particularly Assassins, who rely on dealing high damage to all targets and bringing them down swiftly and cleanly. Thus, it is natural for champions like Zed, Rengar, or Kha’Zix, among others, to focus heavily on building up their Lethality, especially when up against heavily armored champions such as Rammus or Malphite. On the other hand, some champions actually scale with the Lethality stat, meaning it is much more a core stat for them rather than a build option.

These champions include the likes of Pyke, whose every single ability, except for his Q (Bone Skewer), scales with Lethality to some degree. His Ultimate’s kill threshold is bigger the more Lethality he has, while his grey health storage, W movement speed, and E stun are amplified by Lethality. This makes him a champion who is probably the most reliant on the Lethality stat in League of Legends, though others profit from it significantly.

One such profiting champion is Miss Fortune, whose ultimate can cause absolute mayhem if she stacks enough Lethality. Most of these Assassin or Lethality items grant a ton of attack damage, and MF’s spells have fantastic AD scaling, which, when combined with the armor shred, can deal literal thousands of damage at a time and decimate grouped enemies.

Lethality is a good choice for many champions in League, and not just Assassins. It can be your get-out-of-jail-free card against certain opponents, so don’t hesitate to purchase some of them if need be.

Author
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Michael Kelly
Staff Writer covering World of Warcraft and League of Legends, among others. Mike's been with Dot since 2020, and has been covering esports since 2018.
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Mateusz Miter
Freelance Writer at Dot Esports. Mateusz previously worked for numerous outlets and gaming-adjacent companies, including ESL. League of Legends or CS:GO? He loves them both. In fact, he wonders which game he loves more every day. He wanted to go pro years ago, but somewhere along the way decided journalism was the more sensible option—and he was right.
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Andrej Barovic
Strategic Content Writer, English Major. Been in writing for 3 years. Focused mostly on the world of gaming as a whole, with particular interest in RPGs, MOBAs, FPS, and Grand Strategies. Favorite titles include Counter-Strike, The Witcher 3, Bloodborne, Sekrio, and Kenshi. Cormac McCarthy apologetic.