Ability Power (AP) is a champion statistic that increases the effectiveness of most abilities. It stacks additively.
Effects that benefit from ability power receive a bonus based on a certain percentage of a champion's current ability power. For example, if a spell deals 100 (+20% AP) damage and a champion has 50 ability power, the spell's damage will increase by 10. In-game, spell descriptions do not display the percentage, but do display the resulting bonus; the previous example would display as 100 (+10).
Ability power has a theoretical gold value of 21.75 per unit. This means that is the most efficient AP core item, with a gold/AP ratio of 20.833∞.The costs of these stats are always offset by increased final costs of their upgraded items.
Increasing Ability Power
Items
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Specific to
- 1 − 18 (based on level) ability power and 10 − 180 (based on level) mana. : Passive: Grants
- 3 − 54 (based on level) ability power and 15 − 270 (based on level) mana. : Passive: Grants
- 6 − 108 (based on level) ability power and 20 − 360 (based on level) mana. : Passive: Grants
- 10 − 180 (based on level) ability power and 25 − 450 (based on level) mana. : Passive: Grants
Champion Abilities
Note: Only the ability power buffs of these abilities are shown here. To read more information on each of these abilities, follow the links to their champions' pages.
- 50% of his total magic resistance to his ability power. adds
- grants him 35 / 50 / 80 ability power for 25 seconds.
- passively generates souls for him to collect, with each soul collected permanently granting 0.75 ability power.
- permanently grants him 1 ability power whenever he hits an enemy champion with an ability, and 5 ability power whenever he scores a champion takedown.
- 4% of his bonus health. grants ability power equal to
Masteries
- attack damage (2 / 4 / 6 / 8 / 10 at level 18) and 0.6 / 1.2 / 1.8 / 2.4 / 3 + (0.133 / 0.267 / 0.4 / 0.533 / 0.667 × level) ability power (3 / 6 / 9 / 12 / 15 at level 18). : Grants 0.4 / 0.8 / 1.2 / 1.6 / 2 + (0.089 / 0.178 / 0.267 / 0.356 / 0.444 × level)
Neutral buffs
- The +8 / 16 / 24% ability power. buff grants
- The +40 ability power (among other bonuses) for 3 minutes. buff grants up to
Runes
Trivia
- The ability with the largest AP ratio is , with a maximum AP ratio of (+ 515% AP) counting initial cast of (+ 65% AP) and the target taking damage from all 45 ticks of tibbers aura damage ((+ 10% AP) per tick).
- The second and third bounces of scale exponentially, however the low base ratio means it will not beat other spells at normal levels of AP.
- , , , , , , , , , , , , and have no abilities or innate effects that scale with ability power.
(Last updated January 2nd, 2017, patch 6.24)
Aside from magic resistance when disconnected), the highest attainable ability power by a playable champion on Summoner's Rift is still on thanks to his passive, .
- To reach this amount there are 5 nearby enemy players and 3 allied players needed, who play , and .
- Be level 18.
- Have a full rune page of Template:Rune runes.
- Have maximum ranks in , , , and .
- Be attacked by an enemy champion.
- Stand near an allied turret.
- Possess the Template:Moi. buff (after 35 minutes) and three Infernal stacks of the buff, empowered by the buff of the
- Have a fully stacked , 4 s, and one .
- Have consumed an and have cast on himself.
- Be a Conduit for at 100 charges (connected to )
- Be affected by and by .
must:
- Be level 18.
- Have maximum ranks in the .
- Use her on .
must:
- Have .
- Have maximum ranks in the .
- Use level 5 on Galio.
- Be a Conduit for at 100 charges (connected to ).
must:
- Be level 18.
- Having a full rune page of Template:Rune runes.
- Have maximum ranks , , and .
- Be attacked by an enemy champion.
- Stand near an allied turret.
- Be next to and use his level 5 on him, while shielded by .
- Have 6 s.
must:
- This combination will result in ability power. having about 2249
- Relevant mathematics:
Resultant magic resistance = [a(1 + y) + b(1 + x)(1 + y) + c(1 + x)] / (1 - xy)
= (53.4 × 1.1 + 527.44 × 1.05 × 1.1 + 36 × 1.05) / (1 - 0.05 × 0.1) = 709.27959799- bonus magic resistance = 709.27959799 − 53.4 = 655.87959799
total magic resistance
- base magic resistance at level 18 = 53.4
= 90 + 30 + 11 + 8 + 15 + 129.94073568 = 283.94073568- Magic resistance by 25 + 0.16 × 655.87959799 = 129.94073568 =
bonus magic resistance without counting and - Flat magic resistance from = 36
- Applying the formula (see Recursion)
Resultant magic resistance = [a(1 + y) + b(1 + x)(1 + y) + c(1 + x)] / (1 - xy)
= (53.4 × 1.1 + 283.94073568 × 1.05 × 1.1 + 36 × 1.05) / (1 - 0.05 × 0.1) = 426.62467307- Ability power from 0.5 = 213.31233654 = 426.62467307 ×
total magic resistance
[Last updated 13/8/2015 on patch 5.15]
- The highest attainable ability power by a playable champion at level 1 (without disconnecting) is 129.2032153 on
- Have maximum ranks in the Mental Force, Arcane Mastery, Archmage, and Resistance masteries.
- Have 3 last points in Enchanted Armor.
- Have a full rune page of Template:Rune runes.
- Have bought a .
- Use .
- Be under the effect of with five enemies nearby.
- Be under the effects of and .
thanks to his passive, . To reach this amount, he must:
- This combination will result in ability power. having 129.2032153
- Relevant mathematics:
- 5 + 5 × 3 + 0.77 × 9 + 0.74 × 9 + 1.34 × 9 + 4 × 9 + 25) × 1.10 = 117.315
- 5 + 30 + (15 + 117.315 × 0.1) + 10 + 10) × 1.075) + 32.1 = 119.9613625
- 0.89 + 6 + 0.59 × 9 + 0.59 × 9 + 1.19 × 9 + 4.95 × 3 + 20 + (119.9613625 × 0.5)) × 1.05 = 129.2032153 ability power = (
magic resist = ((
bonus magic resist = ( - 5 + 30 + (15 + 117.315 × 0.1) + 10 + 10) × 1.075) + 32.1 = 119.9613625
- 5 + 5 × 3 + 0.77 × 9 + 0.74 × 9 + 1.34 × 9 + 4 × 9 + 25) × 1.10 = 117.315