Life steal

Life steal is an offensive stat that restores health to the wielder for a percentage of all on-hit physical damage they deal. Basic attacks, abilities that apply on-hit effects, and abilities that modify basic attacks all benefit from lifesteal.

Life steal is calculated from the actual damage done to an enemy, after armor and all other forms of damage reduction. All champions have 0% base life steal. It can be increased with items, runes, masteries, and some champion abilities.

Champion abilities
Note: Only the life steal buff effect of these abilities is shown here, to read more information on each of these abilities, follow the link on each of them.
 * grants life steal for 5 seconds.
 * permanently grants him % life steal.
 * gives him life steal for 6 seconds.
 * grants him 30% life steal for the duration of the ability.
 * grants him life steal while he is in this stance.

Masteries

 * grants life steal.

Trivia
[Last updated 13/8/2015 on patch 5.15]
 * The maximum achievable life steal by a playable champion is  on thanks to his passive, . To reach this amount, he must:
 * Be on Summoner's Rift or Butcher's Bridge (for the availability of ).
 * Have maximum ranks in the and  masteries.
 * Have three.
 * Have one, four , and a.
 * Be at while being under the effects of  to benefit from.


 * This combination will result in having  life steal.
 * Relevant mathematics:


 * life steal()
 * Upon reaching this amount of life steal, and with a basic attack dealing + 10% of his target's maximum health as physical damage,  will restore up to  + 23.166% of his target's maximum health per basic attack.

On Twisted Treeline and Crystal Scar, the replacement of with  results in a lower maximum of , which requires  to have attacked at least 5 times with no more than 8 seconds separating each attack, resulting in a base damage of 503 and healing of.