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Cooldown reduction icon.png 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 Additive stacking icon.png 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 Gold 26.67 per point.

Types and Application

The type of haste affects various cooldowns:

Ability haste does not apply to the following:


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

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:

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

Increasing ability haste


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

Abyssal Mask Abyssal Mask2700 2700 Gold10All maps
Aegis of the Legion Aegis of the Legion1400 1400 Gold10All maps
Anathema's Chains Anathema's Chains2500 2500 Gold20All maps
Axiom Arc Axiom Arc3000 3000 Gold25All maps
Bandleglass Mirror Bandleglass Mirror950 950 Gold10All maps
Banshee's Veil Banshee's Veil2600 2600 Gold10All maps
Black Cleaver Black Cleaver3100 3100 Gold30All maps
Caesura Caesura2800 2800 Gold25All maps
Caulfield's Warhammer Caulfield's Warhammer1100 1100 Gold10All maps
Ceaseless Hunger Ceaseless Hunger3300 3300 Gold25All maps
Chempunk Chainsword Chempunk Chainsword2600 2600 Gold15All maps
Chemtech Putrifier Chemtech Putrifier2300 2300 Gold20All maps
Cosmic Drive Cosmic Drive3000 3000 Gold30All maps
Crown of the Shattered Queen Crown of the Shattered Queen2800 2800 Gold20All maps
Death's Dance Death's Dance3300 3300 Gold15All maps
Deicide Deicide3300 3300 Gold25All maps
Divine Sunderer Divine Sunderer3300 3300 Gold20All maps
Draktharr's Shadowcarver Draktharr's Shadowcarver3100 3100 Gold25All maps
Dreamshatter Dreamshatter3300 3300 Gold25All maps
Duskblade of Draktharr Duskblade of Draktharr3100 3100 Gold20All maps
Equinox Equinox2500 2500 Gold25All maps
Essence Reaver Essence Reaver2800 2800 Gold20All maps
Eternal Winter Eternal Winter2800 2800 Gold25All maps
Evenshroud Evenshroud2500 2500 Gold20All maps
Everfrost Everfrost2800 2800 Gold20All maps
Eye of Luden Eye of Luden3200 3200 Gold25All maps
Fiendish Codex Fiendish Codex900 900 Gold10All maps
Fimbulwinter Fimbulwinter2700 2700 Gold15All maps
Forgefire Crest Forgefire Crest3200 3200 Gold25All maps
Frostfire Gauntlet Frostfire Gauntlet2800 2800 Gold20All maps
Frozen Heart Frozen Heart2500 2500 Gold20All maps
Gargoyle Stoneplate Gargoyle Stoneplate3200 3200 Gold15All maps
Glacial Buckler Glacial Buckler900 900 Gold10All maps
Goredrinker Goredrinker3300 3300 Gold20All maps
Guardian's Blade Guardian's Blade950 950 Gold15Howling Abyss
Hextech Rocketbelt Hextech Rocketbelt3200 3200 Gold15All maps
Horizon Focus Horizon Focus3000 3000 Gold15All maps
Icathia's Curse Icathia's Curse3200 3200 Gold20All maps
Imperial Mandate Imperial Mandate2500 2500 Gold20All maps
Infinity Force Infinity Force3333 3333 Gold25All maps
Ionian Boots of Lucidity Ionian Boots of Lucidity950 950 Gold20All maps
Kindlegem Kindlegem800 800 Gold10All maps
Knight's Vow Knight's Vow2300 2300 Gold10All maps
Liandry's Anguish Liandry's Anguish3200 3200 Gold20All maps
Liandry's Lament Liandry's Lament3200 3200 Gold25All maps
Lich Bane Lich Bane3000 3000 Gold15All maps
Locket of the Iron Solari Locket of the Iron Solari2500 2500 Gold20All maps
Lost Chapter Lost Chapter1300 1300 Gold10All maps
Luden's Tempest Luden's Tempest3200 3200 Gold20All maps
Manamune Manamune2900 2900 Gold15All maps
Maw of Malmortius Maw of Malmortius2900 2900 Gold20All maps
Mikael's Blessing Mikael's Blessing2300 2300 Gold15All maps
Moonstone Renewer Moonstone Renewer2500 2500 Gold20All maps
Muramana Muramana2900 2900 Gold15All maps
Navori Quickblades Navori Quickblades3400 3400 Gold30All maps
Night Harvester Night Harvester3200 3200 Gold15All maps
Prowler's Claw Prowler's Claw3100 3100 Gold20All maps
Randuin's Omen Randuin's Omen2700 2700 Gold10All maps
Ravenous Hydra Ravenous Hydra3300 3300 Gold20All maps
Redemption Redemption2300 2300 Gold15All maps
Reliquary of the Golden Dawn Reliquary of the Golden Dawn2500 2500 Gold25All maps
Riftmaker Riftmaker3200 3200 Gold15All maps
Rimeforged Grasp Rimeforged Grasp2800 2800 Gold25All maps
Sandshrike's Claw Sandshrike's Claw3100 3100 Gold25All maps
Seat of Command Seat of Command2500 2500 Gold25All maps
Serylda's Grudge Serylda's Grudge3200 3200 Gold20All maps
Shurelya's Battlesong Shurelya's Battlesong2500 2500 Gold20All maps
Shurelya's Requiem Shurelya's Requiem2500 2500 Gold25All maps
Spirit Visage Spirit Visage2900 2900 Gold10All maps
Starcaster Starcaster2500 2500 Gold25All maps
Stridebreaker Stridebreaker3300 3300 Gold20All maps
Sunfire Aegis Sunfire Aegis3200 3200 Gold20All maps
Trinity Force Trinity Force3333 3333 Gold20All maps
Turbo Chemtank Turbo Chemtank2800 2800 Gold20All maps
Turbocharged Hexperiment Turbocharged Hexperiment2800 2800 Gold25All maps
Umbral Glaive Umbral Glaive2300 2300 Gold15All maps
Upgraded Aeropack Upgraded Aeropack3200 3200 Gold20All maps
Vespertide Vespertide3200 3200 Gold20All maps
Vigilant Wardstone Vigilant Wardstone1100 1100 Gold15Summoner's Rift, Nexus Blitz
Warmog's Armor Warmog's Armor3000 3000 Gold10All maps
Watchful Wardstone Watchful Wardstone1100 1100 Gold10Summoner's Rift, Nexus Blitz
Winter's Approach Winter's Approach2700 2700 Gold15All maps
Youmuu's Ghostblade Youmuu's Ghostblade3000 3000 Gold15All maps
Zeke's Convergence Zeke's Convergence2400 2400 Gold20All maps
Zhonya's Hourglass Zhonya's Hourglass2600 2600 Gold10All maps

Item passives


Neutral Buffs

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
Flat Reduction
Percentage Reduction
Cooldown reset / refresh
Partial Cooldown Refunding


Percentage Reduction

Increasing basic ability haste

Basic ability haste stacks additively with ability haste.

Increasing ultimate haste

Ultimate haste stacks additively and is applied before ability haste.

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 Goredrinker and Stridebreaker Stridebreaker.

Item Haste
None Ingenious Hunter rune.png0 Ingenious Hunter rune.png1 Ingenious Hunter rune.png2 Ingenious Hunter rune.png3 Ingenious Hunter rune.png4 Ingenious Hunter rune.png5
None 0 20 26 32 38 44 50
Cosmic Insight rune.png 10 30 36 42 48 54 60

Item Haste (Equivalent in CDR)
None Ingenious Hunter rune.png0 Ingenious Hunter rune.png1 Ingenious Hunter rune.png2 Ingenious Hunter rune.png3 Ingenious Hunter rune.png4 Ingenious Hunter rune.png5
None 0% 16.67% 20.63% 24.24% 27.54% 30.56% 33.33%
Cosmic Insight rune.png 9.09% 23.08% 26.47% 29.58% 32.43% 35.06% 37.5%

Increasing summoner spell haste

Summoner spell haste
Summoner's Rift icon.png Summoner's Rift
Base cooldown ▶ 360s
(Clarity.pngHeal.pngUnleashed Teleport.png)
Cooldown reduction icon.png Haste
12 (Ionian Boots of Lucidity item.png) 321.43s 267.86s 214.29s 187.5s 160.71s 80.36s 17.86s
18 (Cosmic Insight rune.png) 305.08s 254.24s 203.39s 177.97s 152.54s 76.27s 16.95s
30 (Cosmic Insight rune.png Ionian Boots of Lucidity item.png) 276.92s 230.77s 184.62s 161.54s 138.46s 69.23s 15.38s
Howling Abyss icon.png Howling Abyss
Base cooldown ▶ 300s
Cooldown reduction icon.png Haste
70 (Howling Abyss aura.png) 176.47s 141.18s 123.53s 105.88s 47.06s 11.76s
82 (Howling Abyss aura.pngIonian Boots of Lucidity item.png) 164.84s 131.87s 115.38s 98.9s 43.96s 10.99s
88 (Howling Abyss aura.pngCosmic Insight rune.png) 159.57s 127.66s 111.7s 95.74s 42.55s 10.64s
100 (Howling Abyss aura.pngCosmic Insight rune.pngIonian Boots of Lucidity item.png) 150s 120s 105s 90s 40s 10s


  • There are only two runes that can have their cooldown reduced:


  • 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.[1]

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.
  • Ability haste:
    • Items = 25 + 25 25 + 25 + 30 30 + 30 30 + 30 30 + 25 25 + 15 15 = 180 ability haste
    • Runes = 10 10 + Rune shard Ability Haste.png 8 = 18 ability haste
    • Buff = 10 10 + 20 20 = 30 ability haste
    • Ability Haste Multiplier = 1 + 0.12 0.12 = 1.12
      • Total ability haste = (180 + 18 + 30) × 1.12 = 255.36
  1. Yetter, M. (2020, August 7). Preseason 2021 Class Item Goals. leagueoflegends.com.