Ability power, or AP, is one of the two main offensive stats that binds champions to certain item builds, and the counterpart to 
attack damage. Unlike attack damage, ability power does not have a tangible, baseline effect. Apart from increasing damage, it also most commonly scales the potency of indirect-combat or utility effects (for example, 
slows and movement speed buffs).
Ability power is defined by the lack of innate multiplicative synergy that attack damage has with attack speed, critical strike chance & critical strike damage, and attack effects. Because of that, champions that utilize ability power either:
- Have effectively none or purposeless basic attacks after a certain point in the game, meaning they are pure ability-casters (e.g.
Syndra, 
Xerath, 
Swain, 
Ahri, etc.) OR - Are purposefully designed to have modified basic attacks or abilities that explicitly scale off of some or all of those same statistics that attack damage-utilizing champions do (e.g.
Zoe, 
Kayle, 
Katarina, 
Diana, etc.).
- Ability power
stacks additively, and each point acquired directly adds to the statistic (1:1).
Every champion starts with 0 ability power, which does not increase through growth per level. Ability power is gained from any source other than levels, for example from buffs, items, runes, and others.
- Ability power has a gold value of
20 per point.
Ability power as scaling[]
Effects may benefit from (scale off of) a percentage/ratio, of the total amount of AP. When referring to these scaling ratios, this is always shortened to simply "AP".
Many abilities, items, and runes scale off of ability power through those AP ratios. Note that AP scaling does not necessarily mean magic damage dealt; ratios can be assigned to any damage type.
The following 20 champions do not have ability power ratios on any of their abilities: 
Aatrox, 
Camille, 
Darius, 
Dr. Mundo, 
Draven, 
Garen, 
Kayn, 
Kled, 
Naafiri, 
Nilah, 
Olaf, 
Pyke, 
Riven, 
Samira, 
Sett, 
Talon, 
Urgot, 
Xayah, 
Yone, and 
Zed.
Items[]
Runes[]
Neutral buffs[]
Increasing ability power[]
Items[]
This table is automatically generated based on the data from Module:ItemData/data.
| Item | Cost | Amount | Availability |
|---|---|---|---|
 Aether Wisp | 850  | 30 | Nexus Blitz, Classic Summoner's Rift 5v5, All Random All Mid |
 Amplifying Tome | 400 | 20 | Nexus Blitz, Classic Summoner's Rift 5v5, All Random All Mid |
 Archangel's Staff | 2900 | 80 | Nexus Blitz, Arena, Classic Summoner's Rift 5v5, All Random All Mid |
 Ardent Censer | 2300 | 50 | Nexus Blitz, Arena, Classic Summoner's Rift 5v5, All Random All Mid |
 Bandleglass Mirror | 1000 | 20 | Nexus Blitz, Classic Summoner's Rift 5v5, All Random All Mid |
 Banshee's Veil | 3100 | 120 | Nexus Blitz, Arena, Classic Summoner's Rift 5v5, All Random All Mid |
 Blackfire Torch | 2800 | 90 | Nexus Blitz, Classic Summoner's Rift 5v5, All Random All Mid |
 Blasting Wand | 850 | 45 | Nexus Blitz, Classic Summoner's Rift 5v5, All Random All Mid |
 Blighting Jewel | 1100 | 25 | Nexus Blitz, Classic Summoner's Rift 5v5, All Random All Mid |
 Bloodletter's Curse | 2500 | 60 | Arena |
 Chemtech Putrifier | 2500 | 40 | Arena |
 Cosmic Drive | 3000 | 80 | Nexus Blitz, Arena, Classic Summoner's Rift 5v5, All Random All Mid |
 Crown of the Shattered Queen | 0 | 85 | Arena |
 Cruelty | 0 | 80 | Arena |
 Cryptbloom | 2850 | 70 | Nexus Blitz, Arena, Classic Summoner's Rift 5v5, All Random All Mid |
 Dark Seal | 350 | 15 | Classic Summoner's Rift 5v5 |
 Dawncore | 2700 | 60 | Nexus Blitz, Arena, Classic Summoner's Rift 5v5, All Random All Mid |
 Demonic Embrace | 0 | 80 | Arena |
 Detonation Orb | 0 | 90 | Arena |
 Doran's Ring | 400 | 18 | Nexus Blitz, Classic Summoner's Rift 5v5 |
 Echoes of Helia | 2200 | 40 | Nexus Blitz, Arena, Classic Summoner's Rift 5v5, All Random All Mid |
 Empyrean Promise | 0 | 60 | Arena |
 Everfrost | 0 | 100 | Arena |
 Fated Ashes | 900 | 30 | Nexus Blitz, Classic Summoner's Rift 5v5, All Random All Mid |
 Fiendish Codex | 900 | 25 | Nexus Blitz, Classic Summoner's Rift 5v5, All Random All Mid |
 Guardian's Amulet | 500 | 20 | Arena |
 Guardian's Orb | 950 | 50 | Arena, All Random All Mid |
 Guardian's Shroud | 500 | 35 | Arena |
 Guinsoo's Rageblade | 3000 | 35 | Nexus Blitz, Arena, Classic Summoner's Rift 5v5, All Random All Mid |
 Haunting Guise | 1300 | 30 | Nexus Blitz, Classic Summoner's Rift 5v5, All Random All Mid |
 Hextech Alternator | 1100 | 45 | Nexus Blitz, Classic Summoner's Rift 5v5, All Random All Mid |
 Hextech Gunblade | 2500 | 90 | Arena |
 Hextech Rocketbelt | 2600 | 70 | Nexus Blitz, Arena, Classic Summoner's Rift 5v5, All Random All Mid |
 Horizon Focus | 2700 | 90 | Nexus Blitz, Arena, Classic Summoner's Rift 5v5, All Random All Mid |
 Imperial Mandate | 2300 | 60 | Nexus Blitz, Arena, Classic Summoner's Rift 5v5, All Random All Mid |
 Innervating Locket | 0 | 70 | Arena |
 Liandry's Torment | 3000 | 90 | Nexus Blitz, Arena, Classic Summoner's Rift 5v5, All Random All Mid |
 Lich Bane | 3100 | 100 | Nexus Blitz, Arena, Classic Summoner's Rift 5v5, All Random All Mid |
 Lost Chapter | 1200 | 40 | Nexus Blitz, Classic Summoner's Rift 5v5, All Random All Mid |
 Luden's Companion | 2900 | 95 | Nexus Blitz, Arena, Classic Summoner's Rift 5v5, All Random All Mid |
 Malignance | 2700 | 80 | Nexus Blitz, Arena, Classic Summoner's Rift 5v5, All Random All Mid |
 Mejai's Soulstealer | 1500 | 20 | Classic Summoner's Rift 5v5 |
 Moonflair Spellblade | 0 | 85 | Arena |
 Moonstone Renewer | 2200 | 30 | Nexus Blitz, Arena, Classic Summoner's Rift 5v5, All Random All Mid |
 Morellonomicon | 2200 | 90 | Nexus Blitz, Arena, Classic Summoner's Rift 5v5, All Random All Mid |
 Nashor's Tooth | 3000 | 90 | Nexus Blitz, Arena, Classic Summoner's Rift 5v5, All Random All Mid |
 Needlessly Large Rod | 1250 | 70 | Nexus Blitz, Classic Summoner's Rift 5v5, All Random All Mid |
 Night Harvester | 0 | 90 | Arena |
 Oblivion Orb | 800 | 30 | Nexus Blitz, Classic Summoner's Rift 5v5, All Random All Mid |
 Perplexity | 2500 | 60 | Arena |
 Rabadon's Deathcap | 3600 | 140 | Nexus Blitz, Arena, Classic Summoner's Rift 5v5, All Random All Mid |
 Reality Fracture | 0 | 80 | Arena |
 Riftmaker | 3100 | 80 | Nexus Blitz, Arena, Classic Summoner's Rift 5v5, All Random All Mid |
 Rite of Ruin | 2500 | 50 | Arena |
 Rod of Ages | 2600 | 50 | Nexus Blitz, Arena, Classic Summoner's Rift 5v5, All Random All Mid |
 Runecarver | 0 | 80 | Arena |
 Rylai's Crystal Scepter | 2600 | 75 | Nexus Blitz, Arena, Classic Summoner's Rift 5v5, All Random All Mid |
 Sanguine Gift | 0 | 80 | Arena |
 Seeker's Armguard | 1600 | 45 | Nexus Blitz, Classic Summoner's Rift 5v5, All Random All Mid |
 Seraph's Embrace | 2900 | 80 | Nexus Blitz, Arena, Classic Summoner's Rift 5v5, All Random All Mid |
 Shadowflame | 3200 | 120 | Nexus Blitz, Arena, Classic Summoner's Rift 5v5, All Random All Mid |
 Shattered Armguard | 1600 | 45 | Nexus Blitz, Classic Summoner's Rift 5v5, All Random All Mid |
 Shurelya's Battlesong | 2200 | 50 | Nexus Blitz, Arena, Classic Summoner's Rift 5v5, All Random All Mid |
 Staff of Flowing Water | 2300 | 40 | Nexus Blitz, Arena, Classic Summoner's Rift 5v5, All Random All Mid |
 Stormsurge | 2900 | 95 | Nexus Blitz, Arena, Classic Summoner's Rift 5v5, All Random All Mid |
 Sword of Blossoming Dawn | 2500 | 30 | Arena |
 Talisman of Ascension | 0 | 0 | Arena |
 The Golden Spatula | 0 | 150 | Arena |
 Verdant Barrier | 1600 | 40 | Nexus Blitz, Classic Summoner's Rift 5v5, All Random All Mid |
 Void Staff | 3000 | 90 | Nexus Blitz, Arena, Classic Summoner's Rift 5v5, All Random All Mid |
 Wooglet's Witchcap | 0 | 300 | Arena |
 Wordless Promise | 2500 | 50 | Arena |
 Zhonya's Hourglass | 3250 | 120 | Nexus Blitz, Arena, Classic Summoner's Rift 5v5, All Random All Mid |
Item passives[]
Consumables[]
Champion abilities[]
Runes[]
Neutral Buffs[]
Decreasing ability power[]
Champion abilities[]
Trivia[]
- The ability with the largest AP ratio is
Annie's 
Summon Tibbers, with a maximum AP ratio of (+ 615% AP) counting initial cast of (+ 75% AP) and the target taking damage from all 45 ticks of 
Tibbers aura damage ((+ 12% AP) per tick). - The second and third bounces of
Nami's 
Ebb and Flow scale exponentially, however the low base ratio means it will not beat other spells at normal levels of AP.
Last updated: May 20, 2023, patch V13.10
- Disregarding any form of infinite scaling, items like
Seraph's Embrace that grant AP based on any of their user's other stats, and allied or neutral buffs such as 
Hand of Baron, the maximum attainable ability power that any champion is able to obtain is 1255.8 AP with no boots, or 1115.8 AP with boots.
- Level 18
- Items:
Crown of the Shattered Queen while Poise is active
Rabadon's Deathcap and Magical Opus bonus
Mejai's Soulstealer and 25 stacks of Dread- Any three of
Shadowflame, 
Nashor's Tooth, 
Cosmic Drive, 
Horizon Focus (any two, if including boots)
- Five legendary items mythic passive without boots (four, if including boots).
- Consumed
Elixir of Sorcery
- Runes:
- 12 stacks of
Conqueror 
Absolute Focus while health is at least 70%
Waterwalking while in the river- 2 ×
Adaptive force rune shard
- 12 stacks of
- Any Champion without boots:
Last updated: May 20, 2023, patch V13.10
- Disregarding any form of infinite scaling, the highest attainable ability power by a champion on Summoner's Rift is
Singed, reaching 1851.2 AP without boots.
- Level 18
- Items:
Caesura while Poise is active and five legendary items mythic passive bonus- Shadowflame
- Rabadon's Deathcap and Magical Opus bonus
- Mejai's Soulstealer and 25 stacks of Dread
- Seraph's Embrace and Awe bonus
Demonic Embrace and Dark Pact bonus- Consumed Elixir of Sorcery
- Runes:
- 15 stacks of
Legend: Bloodline - 12 stacks of Conqueror
- Absolute Focus while health is at least 70%
- Waterwalking while in the river
- 2 × Adaptive force rune shard
Health rune shard
- 15 stacks of
- Other Buffs:
- Hand of Baron
- 4 ×
Infernal Might 
Staff of Flowing Water's Rapids
Insanity Potion active
- Singed's bonus mana = 860 + 800 = 1660
- Seraph's Embrace's passive bonus ability power = 1660 x 0.025 = 41.5
- Singed's bonus health = 350 + 200 + 350 + 100 + 200 + 85 + 140 = 1425
- Demonic Embrace's passive bonus ability power = 1425 x 0.02 = 28.5
- Syndra is a close second, at 1849.75 AP
Last updated: May 5 2023, patch V13.9
- The highest attainable ability power by a champion at level 1 using only their starting gold is 70 AP on any champion.
- Runes:
- 12 stacks of Conqueror
- Absolute Focus while health is at least 70%
- Waterwalking while in the river
- 2 × Adaptive force rune shard
- 12 stacks of
- Items:
- 1 ×
Amplifying Tome
- 1 ×
| Offensive | Ability power · Attack damage ·  Attack speed ·  Critical strike chance ·  Critical strike damage ·  Armor penetration ·  Magic penetration ·  Life steal ·  Omnivamp · Physical vamp ·  True damage
|
|---|---|
| Defensive |  Heal and shield power ·  Health ·  Health regeneration ·  Armor ·  Magic resistance ·  Tenacity ·  Slow resist
|
| Utility |  Ability haste ·  Energy ·  Energy regeneration ·  Mana ·  Mana regeneration  Movement speed ·  Range
|
| Other |  Experience ·  Gold generation
|