Veldin

Lethality calculator

Lethality

Flat armor penetration's been changed to Lethality. They're pretty much the same thing, but the bulk of Lethality's penetration scales with your opponent's level. This makes it less snowbally, meaning we can give Assassins more of it than we could flat armor penetration!
- Riot games

Lethality to Armor Penetration

Champion level

Level of the champion you are targeting.
1
18

Lethality

Armor Penetration (7.2) (current)

Armor Penetration (pre 7.2)

Calculation

Calculation 7.2 (current): penetration = lethality * (0.6 + 0.4 * level / 18)
Calculation < 7.2: penetration = (0.4 * lethality) + (((0.6 * lethality) * level)/18)

Updated

2/1/2017: Updated the calculator for 7.2 (Thanks @RuneKatashima for pointing it out!)