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Ability power

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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 Gold 21.75 per unit. This means that Needlessly Large Rod item.png Needlessly Large Rod 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

Item Cost Amount Availability
Abyssal Scepter item.png Abyssal Scepter2750 Gold 60Common
Aether Wisp item.png Aether Wisp850 Gold 30Common
Amplifying Tome item.png Amplifying Tome435 Gold 20Common
Archangel's Staff item.png Archangel's Staff3100 Gold 80Common
Archangel's Staff (Crystal Scar) item.png Archangel's Staff (Quick Charge)3100 Gold 80Crystal Scar
Featured Game Modes
Ardent Censer item.png Ardent Censer2300 Gold 60Common
Athene's Unholy Grail item.png Athene's Unholy Grail2100 Gold 40Common
Blasting Wand item.png Blasting Wand850 Gold 40Common
Doran's Ring item.png Doran's Ring400 Gold 15Classic
Eye of the Watchers item.png Eye of the Watchers2200 Gold 25Summoner's Rift
Fiendish Codex item.png Fiendish Codex900 Gold 30Common
Frost Queen's Claim item.png Frost Queen's Claim2200 Gold 50Common
Frostfang item.jpg Frostfang850 Gold 15Common
Guinsoo's Rageblade item.png Guinsoo's Rageblade3600 Gold 50Common
Haunting Guise item.png Haunting Guise1500 Gold 25Common
Hextech GLP-800 item.png Hextech GLP-8003000 Gold 80Common
Hextech Gunblade item.png Hextech Gunblade3400 Gold 80Common
Hextech Protobelt-01 item.png Hextech Protobelt-012500 Gold 60Common
Hextech Revolver item.png Hextech Revolver1050 Gold 40Common
Liandry's Torment item.png Liandry's Torment3100 Gold 80Common
Lich Bane item.png Lich Bane3200 Gold 80Common
Lost Chapter item.png Lost Chapter900 Gold 25Common
Luden's Echo item.png Luden's Echo3200 Gold 100Common
Mejai's Soulstealer item.png Mejai's Soulstealer1400 Gold 20Summoner's Rift
Moonflair Spellblade item.png Moonflair Spellblade2500 Gold 50Howling Abyss
Morellonomicon item.png Morellonomicon2900 Gold 100Common
Nashor's Tooth item.png Nashor's Tooth3000 Gold 80Common
Needlessly Large Rod item.png Needlessly Large Rod1250 Gold 60Common
Orb of Winter item.png Guardian's Orb950 Gold 30Howling Abyss
Prospector's Ring item.png Prospector's Ring950 Gold 35Crystal Scar
Rabadon's Deathcap item.png Rabadon's Deathcap3800 Gold 120Summoner's Rift, Howling Abyss
Rod of Ages item.png Rod of Ages2700 Gold 60Common
Rod of Ages (Crystal Scar) item.png Rod of Ages (Crystal Scar)2600 Gold 60Crystal Scar
Magus item.png Runic Echoes1625 Gold 60Classic
Rylai's Crystal Scepter item.png Rylai's Crystal Scepter2600 Gold 75Common
Seeker's Armguard item.png Seeker's Armguard1200 Gold 20Common
Seraph's Embrace item.png Seraph's Embrace0 Gold 80Common
Seraph's Embrace item.png Seraph's Embrace (Quick Charge)0 Gold 80Crystal Scar
Featured Game Modes
Spellthief's Edge item.png Spellthief's Edge350 Gold 5Common
The Dark Seal item.png The Dark Seal350 Gold 15Summoner's Rift
Void Staff item.png Void Staff2650 Gold 80Common
Wooglet's Witchcap item.png Wooglet's Witchcap3500 Gold 100Howling Abyss
Zeke's Harbinger item.png Zeke's Harbinger2250 Gold 50Common
Zhonya's Hourglass item.png Zhonya's Hourglass2900 Gold 70Summoner's Rift, Howling Abyss

Specific to Viktor Viktor

  • Prototype Hex Core item.png Prototype Hex Core: Passive: Grants 1 - 18 (based on level) ability power and 10 - 180 (based on level) mana.
  • The Hex Core mk-1 item.png The Hex Core mk-1: Passive: Grants 3 - 54 (based on level) ability power and 15 - 270 (based on level) mana.
  • The Hex Core mk-2 item.png The Hex Core mk-2: Passive: Grants 6 - 108 (based on level) ability power and 20 - 360 (based on level) mana.
  • Perfect Hex Core item.png Perfect Hex Core: Passive: Grants 10 - 180 (based on level) ability power and 25 - 450 (based on level) mana.

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.

  • Galio Galio's Runic Skin.png Runic Skin adds 50% of his total magic resistance to his ability power.
  • Singed Singed's Insanity Potion.png Insanity Potion grants him 35 / 50 / 80 ability power for 25 seconds.
  • Thresh Thresh's Damnation.png Damnation passively generates souls for him to collect, with each soul collected permanently granting 0.75 ability power.
  • Veigar Veigar's Phenomenal Evil Power.png Phenomenal Evil 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.
  • Vladimir Vladimir's Crimson Pact.png Crimson Pact grants ability power equal to 4% of his bonus health.

Masteries

  • Arcane Mastery mastery s4.png Natural Talent: Grants 0.4 / 0.8 / 1.2 / 1.6 / 2 + (0.089 / 0.178 / 0.267 / 0.356 / 0.444 × level) 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).

Neutral buffs

  • The Dragon Slayer.png Dragon Slayer buff grants +8 / 16 / 24% ability power.
  • The Hand of Baron.png Hand of Baron buff grants up to +40 ability power (among other bonuses) for 3 minutes.

Runes

Type Tier 3 % of Highest Price
Ability Power
AP mark 3 Mark 0.59 36% 410 IP
AP seal 3 Seal 0.59 36% 410 IP
AP glyph 3 Glyph 1.19 72% 410 IP
AP quint 3 Quintessence 4.95 100% 512 IP
Scaling Ability Power
Scaling AP mark 3 Mark 0.1 per level
(1.8)
59% 410 IP
Scaling AP seal 3 Seal 0.1 per level
(1.8)
59% 410 IP
Scaling AP glyph 3 Glyph 0.17 per level
(3.06)
100% 410 IP
Scaling AP quint 3 Quintessence 0.43 per level
(7.74)
84% 1025 IP

Trivia

  • The ability with the largest AP ratio is Annie Annie's Summon- Tibbers.png Summon: Tibbers, 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 Nami Nami's Ebb and Flow.png Ebb and Flow scale exponentially, however the low base ratio means it will not beat other spells at normal levels of AP.
  • Camille Camille, Darius Darius, Draven Draven, Garen Garen, Kled Kled, Illaoi Illaoi, Kalista Kalista, Kindred Kindred, Olaf Olaf, Riven Riven, Talon Talon, Vayne Vayne, and Zed Zed have no abilities or innate effects that scale with ability power.

(Last updated January 2nd, 2017, patch 6.24)

Aside from Veigar Veigar and Thresh Thresh, who may obtain theoretically infinite ability power due to their respective passive effects, and Galio Galio, interacting with Runic Skin.png Runic Skin and a metagame mechanic not intended to be seen in gameplay (bonus magic resistance when disconnected), the highest attainable ability power by a playable champion on Summoner's Rift is still on Galio Galio thanks to his passive, Runic Skin.png Runic Skin.

To reach this amount there are 5 nearby enemy players and 3 allied players needed, who play Braum Braum, Orianna Orianna and Janna Janna.
Galio Galio must:
Janna Janna must:
Orianna Orianna must:
Braum Braum must:
This combination will result in Galio Galio having about 2249 ability power.
Relevant mathematics:
  Resultant magic resistance = [a(1 + y) + b(1 + x)(1 + y) + c(1 + x)] / (1 - xy)
  • Braum Braum's total magic resistance
    = (53.4 × 1.1 + 527.44 × 1.05 × 1.1 + 36 × 1.05) / (1 - 0.05 × 0.1) = 709.27959799
    • Braum Braum's bonus magic resistance = 709.27959799 − 53.4 = 655.87959799


  • Galio Galio's base magic resistance at level 18 = 53.4
  • Galio Galio's bonus magic resistance without counting Unyielding mastery s4.png Unyielding and Tough Skin mastery s4.png Fearless
    = 90 + 30 + 11 + 8 + 15 + 129.94073568 = 283.94073568
  • Flat magic resistance from Tough Skin mastery s4.png Fearless = 36
  • Applying the formula (see Recursion)
  Resultant magic resistance = [a(1 + y) + b(1 + x)(1 + y) + c(1 + x)] / (1 - xy)
  • Galio Galio's total magic resistance
    = (53.4 × 1.1 + 283.94073568 × 1.05 × 1.1 + 36 × 1.05) / (1 - 0.05 × 0.1) = 426.62467307
    • Ability power from Runic Skin.png Runic Skin = 426.62467307 × 0.5 = 213.31233654


  • Galio Galio's ability power = (15 + 83.16 + 40 + 145 + 120 × 4 + 151.04 + 50 + 213.31233654) × (1 + 0.36 + 0.35 + 0.2) = 2249.04856279



[Last updated 13/8/2015 on patch 5.15]

This combination will result in Galio Galio having 129.2032153 ability power.
Relevant mathematics:
Braum Braum's bonus magic resist = (5 + 5 × 3 + 0.77 × 9 + 0.74 × 9 + 1.34 × 9 + 4 × 9 + 25) × 1.10 = 117.315
Galio Galio's magic resist = ((5 + 30 + (15 + 117.315 × 0.1) + 10 + 10) × 1.075) + 32.1 = 119.9613625
Galio Galio's ability power = (0.89 + 6 + 0.59 × 9 + 0.59 × 9 + 1.19 × 9 + 4.95 × 3 + 20 + (119.9613625 × 0.5)) × 1.05 = 129.2032153


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