Ability haste

 Ability Haste (AH) is a statistic that represents cooldown reduction, particularly cooldown of champion abilities. It is distinct from other versions of haste such as summoner spell haste and item haste, which are not visibly tracked in game. This article will discuss all forms of haste for the topic of cooldown reduction.

Ability Haste can be acquired by items, buffs, and runes; it also stacks additively.

The reduced cooldown is determined at the moment an ability is activated. Increasing or decreasing ability haste while the skill is on cooldown will not affect the cooldown.

Gold Value ​​​

• Ability haste has a gold value of 26.67 per point.

Types and Application

The type of haste affects various cooldowns:

• Ability haste: Champion ability cooldowns (e.g. Lucian's Piercing Light).
• Item haste: Item cooldowns (e.g. Locket of the Iron Solari or Guardian Angel).
• Summoner spell haste: Summoner spell cooldowns (e.g. Flash).

Ability haste does not apply to the following:

• Static cooldowns (e.g. Anivia's Rebirth).
• On-target Cooldowns (e.g. Jarvan IV's Martial Cadence), though there are exceptions.
• Interrupted Durations (e.g. Garen's Perseverance).
• Rune cooldowns.

Formula

Haste reduces the cooldown (of an ability, active item or summoner spell) according to this formula:

$\pagecolor {Black}\color {Black}{\rm {Reduced\ cooldown}}={\rm {Base\ Cooldown}}\times {100 \over 100+{\rm {Haste}}}$

Informally, this means that the casting rate (or casting speed) increases by 1% for every point of haste. For example, adding 100 points of haste will double the casting speed (+100%), cutting the cooldown time by half (50% cooldown reduction); adding another 100 points of haste would result in +200% (or triple) casting speed, cutting the original cooldown time by two thirds (~66.6% cooldown reduction).

In actual matches of regular game modes, values of (ability) haste higher than ~100 rarely occur. This means a reduced cooldown of ~50% is the upper limit to expect.

Cooldown reduction (in percent) may be determined from haste according to this formula:

$\pagecolor {Black}\color {Black}{\rm {Cooldown\ reduction}}={{\rm {Haste}} \over {\rm {Haste}}+100}\times {100}$

Ability Haste on a champion is capped at 500 AH (= 83.3% cooldown reduction). This amount of ability haste is not practically attainable in actual games.

Scaling with ability haste

• Ironspike Whip
• Goredrinker ( Ceaseless Hunger)
• Stridebreaker ( Dreamshatter)
• Vigilant Wardstone

Increasing ability haste

Items

This table is automatically generated based on the data from Module:ItemData/data.

Item	Cost	Amount	Availability
Abyssal Mask Abyssal Mask	2700	10	All maps
Aegis of the Legion Aegis of the Legion	1400	10	All maps
Anathema's Chains Anathema's Chains	2500	20	All maps
Axiom Arc Axiom Arc	3000	25	All maps
Bandleglass Mirror Bandleglass Mirror	950	10	All maps
Banshee's Veil Banshee's Veil	2600	10	All maps
Black Cleaver Black Cleaver	3100	30	All maps
Caesura Caesura	2800	25	All maps
Caulfield's Warhammer Caulfield's Warhammer	1100	10	All maps
Ceaseless Hunger Ceaseless Hunger	3300	25	All maps
Chempunk Chainsword Chempunk Chainsword	2600	15	All maps
Chemtech Putrifier Chemtech Putrifier	2300	20	All maps
Cosmic Drive Cosmic Drive	3000	30	All maps
Crown of the Shattered Queen Crown of the Shattered Queen	2800	20	All maps
Death's Dance Death's Dance	3300	15	All maps
Deicide Deicide	3300	25	All maps
Divine Sunderer Divine Sunderer	3300	20	All maps
Draktharr's Shadowcarver Draktharr's Shadowcarver	3100	25	All maps
Dreamshatter Dreamshatter	3300	25	All maps
Duskblade of Draktharr Duskblade of Draktharr	3100	20	All maps
Equinox Equinox	2500	25	All maps
Essence Reaver Essence Reaver	2800	20	All maps
Eternal Winter Eternal Winter	2800	25	All maps
Evenshroud Evenshroud	2500	20	All maps
Everfrost Everfrost	2800	20	All maps
Eye of Luden Eye of Luden	3200	25	All maps
Fiendish Codex Fiendish Codex	900	10	All maps
Fimbulwinter Fimbulwinter	2700	15	All maps
Forgefire Crest Forgefire Crest	3200	25	All maps
Frostfire Gauntlet Frostfire Gauntlet	2800	20	All maps
Frozen Heart Frozen Heart	2500	20	All maps
Gargoyle Stoneplate Gargoyle Stoneplate	3200	15	All maps
Glacial Buckler Glacial Buckler	900	10	All maps
Goredrinker Goredrinker	3300	20	All maps
Guardian's Blade Guardian's Blade	950	15	Howling Abyss
Hextech Rocketbelt Hextech Rocketbelt	3200	15	All maps
Horizon Focus Horizon Focus	3000	15	All maps
Icathia's Curse Icathia's Curse	3200	20	All maps
Imperial Mandate Imperial Mandate	2500	20	All maps
Infinity Force Infinity Force	3333	25	All maps
Ionian Boots of Lucidity Ionian Boots of Lucidity	950	20	All maps
Kindlegem Kindlegem	800	10	All maps
Knight's Vow Knight's Vow	2300	10	All maps
Liandry's Anguish Liandry's Anguish	3200	20	All maps
Liandry's Lament Liandry's Lament	3200	25	All maps
Lich Bane Lich Bane	3000	15	All maps
Locket of the Iron Solari Locket of the Iron Solari	2500	20	All maps
Lost Chapter Lost Chapter	1300	10	All maps
Luden's Tempest Luden's Tempest	3200	20	All maps
Manamune Manamune	2900	15	All maps
Maw of Malmortius Maw of Malmortius	2900	20	All maps
Mikael's Blessing Mikael's Blessing	2300	15	All maps
Moonstone Renewer Moonstone Renewer	2500	20	All maps
Muramana Muramana	2900	15	All maps
Navori Quickblades Navori Quickblades	3400	30	All maps
Night Harvester Night Harvester	3200	15	All maps
Prowler's Claw Prowler's Claw	3100	20	All maps
Randuin's Omen Randuin's Omen	2700	10	All maps
Ravenous Hydra Ravenous Hydra	3300	20	All maps
Redemption Redemption	2300	15	All maps
Reliquary of the Golden Dawn Reliquary of the Golden Dawn	2500	25	All maps
Riftmaker Riftmaker	3200	15	All maps
Rimeforged Grasp Rimeforged Grasp	2800	25	All maps
Sandshrike's Claw Sandshrike's Claw	3100	25	All maps
Seat of Command Seat of Command	2500	25	All maps
Serylda's Grudge Serylda's Grudge	3200	20	All maps
Shurelya's Battlesong Shurelya's Battlesong	2500	20	All maps
Shurelya's Requiem Shurelya's Requiem	2500	25	All maps
Spirit Visage Spirit Visage	2900	10	All maps
Starcaster Starcaster	2500	25	All maps
Stridebreaker Stridebreaker	3300	20	All maps
Sunfire Aegis Sunfire Aegis	3200	20	All maps
Trinity Force Trinity Force	3333	20	All maps
Turbo Chemtank Turbo Chemtank	2800	20	All maps
Turbocharged Hexperiment Turbocharged Hexperiment	2800	25	All maps
Umbral Glaive Umbral Glaive	2300	15	All maps
Upgraded Aeropack Upgraded Aeropack	3200	20	All maps
Vespertide Vespertide	3200	20	All maps
Vigilant Wardstone Vigilant Wardstone	1100	15	Summoner's Rift, Nexus Blitz
Warmog's Armor Warmog's Armor	3000	10	All maps
Watchful Wardstone Watchful Wardstone	1100	10	Summoner's Rift, Nexus Blitz
Winter's Approach Winter's Approach	2700	15	All maps
Youmuu's Ghostblade Youmuu's Ghostblade	3000	15	All maps
Zeke's Convergence Zeke's Convergence	2400	20	All maps
Zhonya's Hourglass Zhonya's Hourglass	2600	10	All maps

Item passives

• Archangel's Staff
• Duskblade of Draktharr ( Draktharr's Shadowcarver)
• Goredrinker ( Ceaseless Hunger)
• Liandry's Anguish ( Liandry's Lament)
• Night Harvester ( Vespertide)
• Seraph's Embrace
• Shurelya's Battlesong ( Shurelya's Requiem)
• Staff of Flowing Water
• Trinity Force ( Infinity Force)
• Turbo Chemtank ( Turbocharged Hexperiment)
• Vigilant Wardstone

Runes

• Transcendence
• Ability haste rune shard

Neutral Buffs

• Crest of Insight
• Hextech Prowess

Reducing ability cooldowns

Some champions have abilities that decrease their cooldowns by a flat amount, or by a percentage, affecting either their base cooldown or current cooldown, or some abilities can completely refresh their cooldown. Base reduction occurs before ability haste takes effect while flat reduction occurs after ability haste takes effect.

• Depending on built-in reduction type:
  • Base (applies before AH)
  • Flat (applies after AH)
  • Percent (applies to base / current / total cooldown)
  • Refresh (cooldown is immediately reduced to 0)

Champion abilities

Static Reductions

• Fizz's Seastone Trident if Seastone Trident kills its target
• Irelia's Bladesurge when used against marked targets
• Kindred's Dance of Arrows used during Wolf's Frenzy
• Neeko's Inherent Glamour upon switching or deactivating the current disguise
• Nidalee's Pounce upon killing an enemy while in Cougar Form or when Pounce is used upon a Hunted target
• Pantheon's Grand Starfall when cancelled
• Poppy's Keeper's Verdict when cancelled
• Quinn's Harrier based on critical strike chance
• Rek'Sai's Void Rush when cancelled
• Shadow Assassin's Shadow Step upon transforming
• Varus' Blighted Quiver when cancelled without beginning Piercing Arrow
• Vi's Vault Breaker when interrupted during the charge
• Yasuo's Steel Tempest based on total bonus attack speed
• Yone's Mortal Steel and Spirit Cleave based on total bonus attack speed
• Zed's Death Mark when cancelled
• Zilean's Time in a Bottle when interrupted

Flat Reduction

• Aatrox's Deathbringer Stance upon hitting at least one champion or large monster with a basic attack or damaging them with an ability, doubled whenever hitting the Sweetspot of The Darkin Blade
• Amumu's Tantrum whenever he is hit by a basic attack
• Ezreal's Mystic Shot upon hitting any target
• Garen's Judgment when cancelled prematurely
• Gragas' Body Slam when hitting at least one enemy
• Graves' Quickdraw whenever a pellet impacts a target
• Hecarim's Rampage on subsequent casts after damaging at least one target, stacks up to two times
• Irelia's Bladesurge based on the rank of Vanguard's Edge
• Kai'Sa's Supercharge on-attack against any target
• Karma's Gathering Fire for every enemy champion she damages with her abilities
• Katarina's Voracity upon scoring a takedown on an enemy champion she damaged within the last 3 seconds
• Lucian's Relentless Pursuit upon damaging an enemy Lightslinger, doubled against champions
• Maokai's Sap Magic whenever Maokai casts an ability or is hit by an enemy ability
• Master Yi's Alpha Strike on-hit against any target
• Miss Fortune's Strut whenever triggering Love Tap on an enemy
• Nocturne's Umbra Blades whenever he attacks a target, tripled against champions and monsters
• Olaf's Undertow upon retrieving a thrown axe and Reckless Swing everytime he lands a basic attack
• Rakan's Fey Feathers upon basic attacking or hitting an enemy champion with an ability
• Senna's Piercing Darkness on-hit against any target
• Shen's Ki Barrier if the triggering ability affected at least one champion
• Shyvana's Twin Bite on-hit against any target
• Skarner's Crystal Slash on-hit against any target, quadrupled against champions and Fracture whenever triggering Crystal Venom or casting Impale on an enemy
• Syndra's Force of Will when used to throw the Blue Sentinel
• Taric's basic abilities when attacking any target with Bravado. Each Bravado attack grants a full charge of Starlight's Touch
• Thresh's Death Sentence upon hitting any target with Death Sentence's cast
• Tryndamere's Spinning Slash whenever critically striking any target, doubled against champions
• Vi's Blast Shield whenever triggering Denting Blows on any target
• Warwick's Blood Hunt whenever not hunting any enemies
• Xin Zhao's Three Talon Strike on-attack against any target
• Zac's Unstable Matter whenever Zac picks up a Cell Division chunk
• Zed's Living Shadow for every enemy champion hit by Shadow Slash
• Zeri's Spark Surge for every enemy champion hit by her attacks or abilities
• Ziggs' Short Fuse whenever casting an ability
• Zilean's Time Bomb and Time Warp upon casting Rewind

Percentage Reduction

• Annie's Disintegrate if it kills its target
• Darius' Crippling Strike if it kills its target
• Fiora's Lunge if at least one target is hit after the dash
• Illaoi's Harsh Lesson during Leap of Faith
• Janna's Eye of the Storm
• Katarina's Shunpo upon retrieving a dagger for Voracity
• Kha'Zix's Evolved Reaper Claws if used on an isolated target
• Lee Sin's Safeguard if the cast target is a champion
• Master Yi's basic abilities upon scoring a takedown after acquiring at least one point in Highlander
• Morgana's Tormented Shadow upon triggering Soul Siphon against any valid target
• Nasus' Siphoning Strike during Fury of the Sands
• Swain's Nevermove during Demonic Ascension
• Varus' basic abilities when detonating Blighted Quiver stacks on champions or epic monsters
• Vayne's Tumble during Final Hour
• Veigar's Dark Matter based upon his stacks of Phenomenal Evil Power

Cooldown reset / refresh

• Azir's Arise! upon dashing into a champion with Shifting Sands
• Corki's Valkyrie after casting Special Delivery
• Diana's Lunar Rush if used on a target afflicted with Moonlight
• Darius' Noxian Guillotine if the target dies within 0.15 seconds after being hit
• Draven's Blood Rush upon catching a Spinning Axe
• Evelynn's Whiplash upon entering Demon Shade
• Gangplank's Trial by Fire upon detonating a Powder Keg
• Irelia's Bladesurge if the target dies to or during Bladesurge's dash
• Kalista's Rend if it kills at least one target
• Kha'Zix's Evolved Wings whenever scoring a takedown against an enemy champion
• Kled's Bear Trap on a Rope and Jousting upon Mounting up
• Nidalee's Aspect of the Cougar upon triggering Hunt while in Human Form
• Qiyana's Royal Privilege after using Terrashape to gather a different element than her most recent element and Elemental Wrath after casting Terrashape
• Ryze's Overload after casting Rune Prison or Spell Flux
• Samira's Wild Rush upon scoring a takedown against a champion she damaged within the last 3 seconds
• Shadow Assassin's The Darkin Scythe when emerging from Umbral Trespass
• Tristana's Rocket Jump upon scoring a takedown or detonating Explosive Charge at maximum stacks on a champion
• Twitch's Ambush when an enemy champion dies while affected by Deadly Venom

Partial Cooldown Refunding

• Fiddlesticks' Bountiful Harvest if the channel ends for any reason without being interrupted
• Gnar's Boomerang Throw if he catches the boomerangs rebound and if he picks up the boulder that is left after Boulder Toss
• Gwen's Skip 'n Slash upon attacking the first time during the buff duration
• Kai'Sa's Void Seeker upon hitting an enemy champion after evolving Void Seeker by obtaining 100 AP for Living Weapon
• Nautilus' Dredge Line if the cast successfully connects with terrain
• Pantheon's Comet Spear if used as a thrust
• Talon's Noxian Diplomacy if it kills its target
• Varus' Piercing Arrow if the charge is completed without reactivation
• Xerath's Rite of the Arcane if none of the charges are used
• Zac's Elastic Slingshot if manually cancelled or completed without reactivation

Items

Percentage Reduction

• Axiom Arc
• Navori Quickblades

Increasing basic ability haste

Basic ability haste stacks additively with ability haste.

• Sona's Accelerando

Increasing ultimate haste

Ultimate haste stacks additively and is applied before ability haste.

• Ultimate Hunter

Increasing item haste

Item haste stacks additively. It applies to all items with cooldowns, including passives and actives. Item haste stacks additively with ability haste for the cooldowns of items that also scale with ability haste, such as Goredrinker and Stridebreaker.

• Cosmic Insight
• Ingenious Hunter

• Item haste
• Equivalent CDR

Item Haste
	None	0	1	2	3	4	5
None	0	20	26	32	38	44	50
	10	30	36	42	48	54	60

Item Haste (Equivalent in CDR)
	None	0	1	2	3	4	5
None	0%	16.67%	20.63%	24.24%	27.54%	30.56%	33.33%
	9.09%	23.08%	26.47%	29.58%	32.43%	35.06%	37.5%

Increasing summoner spell haste

• Cosmic Insight
• Ionian Boots of Lucidity
• Howling Abyss aura

Summoner spell haste

Summoner's Rift
Base cooldown ▶	360s ()	300s ()	240s ()	210s ()	180s ()	90s ()	20s ()
▼  Haste
12 ()	321.43s	267.86s	214.29s	187.5s	160.71s	80.36s	17.86s
18 ()	305.08s	254.24s	203.39s	177.97s	152.54s	76.27s	16.95s
30 ( )	276.92s	230.77s	184.62s	161.54s	138.46s	69.23s	15.38s
Howling Abyss
Base cooldown ▶		300s ()	240s ()	210s ()	180s ()	80s ()	20s ()
▼  Haste
70 ()		176.47s	141.18s	123.53s	105.88s	47.06s	11.76s
82 ()		164.84s	131.87s	115.38s	98.9s	43.96s	10.99s
88 ()		159.57s	127.66s	111.7s	95.74s	42.55s	10.64s
100 ()		150s	120s	105s	90s	40s	10s

Runes

• There are only two runes that can have their cooldown reduced:
  • Arcane Comet has its remaining cooldown be reduced by a percentage upon hitting an enemy champion with ability damage.
  • Dark Harvest has its cooldown reset to 1.5 seconds upon scoring a takedown against an enemy champion.

Trivia

• Ability haste replaced cooldown reduction as a stat on patch V10.23. The change to an upcapped stat allows more flexibility on creating more items with cooldown reduction power.

---

Last updated: February 3, 2022, patch V12.3

• The highest attainable ability haste is 255.36 AH (on any champion with mana), this is equivalent to 71.86% cooldown reduction.

• Ally:
  • Ornn
• Items:
  • Liandry's Lament
  • Cosmic Drive
  • Navori Quickblades
  • Black Cleaver
  • Axiom Arc
  • Vigilant Wardstone
• Runes:
  • Transcendence
  • Ability haste rune shard
• Buffs:
  • Crest of Insight
  • Staff of Flowing Water

• Ability haste:
  • Items = 25 + 25 + 30 + 30 + 30 + 25 + 15 = 180 ability haste
  • Runes = 10 + 8 = 18 ability haste
  • Buff = 10 + 20 = 30 ability haste
  • Ability Haste Multiplier = 1 + 0.12 = 1.12
    • Total ability haste = (180 + 18 + 30) × 1.12 = 255.36

Champion statistics