Cooldown reduction

**Cooldown reduction** (abbreviated as **CDR**) is a champion statistic that reduces the cooldown of abilities, or the amount of time you must wait before an ability can be used again once you activated it, by a percentage.

Cooldown reduction is granted by items, buffs, runes and masteries, as well as some passive abilities.

Cooldown reduction stacks additively. For example, if you have 5% cooldown reduction from masteries and 10% cooldown reduction from Stinger Stinger, you will have 15% cooldown reduction.

* **Cooldown reduction cannot be increased beyond 40%**
	+ **Unless you have the Intelligence Intelligence mastery (raises your cooldown reduction cap to 45%)**

Cooldown reduction is determined at the moment an ability is activated. Increasing/decreasing your cooldown reduction while the skill is on cooldown will not affect the cooldown.

Cooldown reduction does not apply on item active abilities such as that of Locket of the Iron Solari Locket of the Iron Solari or item passive effects with cooldowns such as that of Guardian Angel Guardian Angel. Most sources of cooldown reduction also do not apply on summoner spells unless specifically stated, e.g. the unique enchantment effect of Distortion Distortion for boots. Cooldown Reduction does not apply to an Innate Ability of any kind.

Although not a basic item, Kindlegem Kindlegem is the item from which the **cooldown reduction** gold value is derived. From this item derives a value of approximately แม่แบบ:G per percentage of **cooldown reduction**. This yields แม่แบบ:G for items with 10% **CDR**, แม่แบบ:G for 15% **CDR**, and แม่แบบ:G for 20% **CDR**.

## Increasing cooldown reduction

### Items

แม่แบบ:Stat table header
แม่แบบ:Do for every item
แม่แบบ:Stat table footer

### Champion abilities

* None (due to wide variety of cooldown reduction items in season six). Cooldown lowering is separately discussed below.

### Masteries

* Intelligence Intelligence increases cooldown reduction and the cap by แม่แบบ:Ap%.

### Neutral buffs

* The แม่แบบ:Bi buff increases cooldown reduction by 10%.

## Lowering cooldowns

Some champions have abilities that decrease their cooldowns by a flat amount, either their base cooldown or current cooldown, or entirely refresh their cooldown. Base reduction occurs before cooldown reduction takes effect while flat reduction occurs after cooldown reduction takes effect. By using those, a champion can disregard the 40% cooldown reduction cap.

**Note:** Only the cooldown reduction of these abilities is shown here, to read more information on each of these abilities, follow the link on each of them.

### Base reduction

* ไฟล์:DariusSquare.png Darius' Crippling Strike Crippling Strike base cooldown is halved if it kills the target.
* ไฟล์:HecarimSquare.png Hecarim's Rampage Rampage base cooldown is reduced by 1 second if it hits a target, stacking up to 2 times.
* ไฟล์:KindredSquare.png Kindred's Dance of Arrows Dance of Arrows base cooldown is reduced to แม่แบบ:Ap seconds while casting inside of Wolf's territory Wolf's territory.

### Flat reduction

* ไฟล์:AlistarSquare.png Alistar's Triumphant Roar Triumphant Roar cooldown is reduced by 2 seconds each time a nearby enemy unit dies.
* ไฟล์:AmumuSquare.png Amumu's Tantrum Tantrum cooldown is reduced by {{#vardefine:n|0.5}}0.5 seconds each time Amumu is hit by an attack.
* ไฟล์:EzrealSquare.png Ezreal's Mystic Shot Mystic Shot reduces all of Ezreal's cooldowns by 1 second if it strikes an enemy unit.
* ไฟล์:GragasSquare.png Gragas' Body Slam Body Slam cooldown is reduced by 3 seconds if it hits an enemy unit.
* ไฟล์:GravesSquare.png Graves' Quickdraw Quickdraw cooldown is reduced by 1 second for every autoattack.
* ไฟล์:KarmaSquare.png Karma's Mantra Mantra cooldown is reduced by แม่แบบ:Pp seconds every time she damages an enemy champion with an ability, and by แม่แบบ:Pp seconds for a basic attack.
* ไฟล์:KatarinaSquare.png Katarina's Voracity Voracity reduces all her abilities' cooldowns by 15 seconds whenever an enemy champion dies within 3 seconds of Katarina dealing damage to them.
* ไฟล์:LucianSquare.png Lucian's Relentless Pursuit Relentless Pursuit cooldown is reduced by 1 second for each of Lightslinger Lightslinger's strikes, and by 2 seconds against champions.
* ไฟล์:Master YiSquare.png Master Yi's Alpha Strike Alpha Strike cooldown is reduced by 1 second for every autoattack.
* ไฟล์:Miss FortuneSquare.png Miss Fortune's Strut Strut cooldown is reduced by 2 - 1.1 seconds by marking a new target with Love Tap Love Tap.
* ไฟล์:NocturneSquare.png Nocturne's Umbra Blades Umbra Blades innate cooldown is reduced by 1 second for every autoattack.
* ไฟล์:OlafSquare.png Olaf's Reckless Swing Reckless Swing cooldown is reduced by 1 second for every autoattack.
	+ Undertow Undertow cooldown is reduced by {{#vardefine:n|4.5}}4.5 seconds if he manages to pick up his axe after using the ability.
* ไฟล์:ShyvanaSquare.png Shyvana's Twin Bite Twin Bite cooldown is reduced by {{#vardefine:n|0.5}}0.5 seconds for every autoattack.
* Skarner's Crystal Slash Crystal Slash cooldown is reduced by {{#vardefine:n|0.5}}0.5 seconds for each successful autoattack, and by 1 second against champions.
* ไฟล์:SyndraSquare.png Syndra's Force of Will Force of Will cooldown is reduced by 1 second if she throws the ไฟล์:Blue SentinelSquare.png Blue Sentinel.
* ไฟล์:TaricSquare.png Taric's Bravado Bravado's basic attacks reduce the cooldowns of his basic abilities by 1 - {{#vardefine:n|0.55}}0.55 seconds, increased to 6 - {{#vardefine:n|3.3}}3.3 seconds for แม่แบบ:Ais recharge time.
* ไฟล์:ThreshSquare.png Thresh's Death Sentence Death Sentence cooldown is reduced by 3 seconds upon hitting an enemy.
* ไฟล์:TryndamereSquare.png Tryndamere's Spinning Slash Spinning Slash cooldown is reduced by 1 second for every critical strike.
* ไฟล์:Xin ZhaoSquare.png Xin Zhao's Three Talon Strike Three Talon Strike reduces his other abilities' cooldowns by 1 second for each strike (for a maximum of 3 seconds reduction).
* ไฟล์:ZedSquare.png Zed's Living Shadow Living Shadow cooldown is reduced by 2 seconds when his Shadow Slash Shadow Slash hits an enemy champion.
* ไฟล์:ZiggsSquare.png Ziggs' Short Fuse Short Fuse innate cooldown is reduced by 4 seconds whenever he uses an ability.
* ไฟล์:ZileanSquare.png Zilean's Rewind Rewind on activation, reduces all of Zilean's other basic abilites' cooldowns by 10 seconds.

### Percentage reduction

* ไฟล์:GnarSquare.png Gnar's Boomerang Throw Boomerang Throw cooldown is reduced by แม่แบบ:Ap% if he can catch it when its return (scales with แม่แบบ:Ais level).
	+ Boulder Toss Boulder Toss cooldown is reduced by 60% if he picks up his boulder after using the ability.
* ไฟล์:Master YiSquare.png Master Yi's Highlander Highlander's passive component allows him to reduce the current cooldown on all of his basic abilities by 70% for every kill or assist he scores.
* ไฟล์:NidaleeSquare.png Nidalee's Pounce Pounce base cooldown is reduced by 70% while it's currently higher if it kills a unit, or if Pounce Pounce hits an enemy marked as Hunted Hunted.
* Sona's Crescendo Crescendo decreases cooldowns of her basic abilities by 20 / 30 / 40%.
* ไฟล์:YasuoSquare.png Yasuo's Steel Tempest Steel Tempest's cooldown is reduced by 1% for every แม่แบบ:As he has.
* ไฟล์:Cho'GathSquare.png Cho'Gath's Feast Feast's cooldown is reduced by 50% if it kills a minion or monster.

### Cooldown refreshing

* ไฟล์:DianaSquare.png Diana's Lunar Rush Lunar Rush cooldown is refreshed if the target is afflicted with the Moonlight debuff from Crescent Strike Crescent Strike.
* ไฟล์:DariusSquare.png Darius' Noxian Guillotine Noxian Guillotine (rank 3) cooldown is refreshed if it kills enemy champion.
* ไฟล์:DravenSquare.png Draven's Blood Rush Blood Rush cooldown is refreshed if Draven catches a Spinning Axe Spinning Axe.
* ไฟล์:EvelynnSquare.png Evelynn's Dark Frenzy Dark Frenzy cooldown is refreshed if Evelynn gets a champion kill or assist.
* ไฟล์:IreliaSquare.png Irelia's Bladesurge Bladesurge cooldown is refreshed if it kills a unit.
* ไฟล์:KalistaSquare.png Kalista's Rend Rend cooldown is refreshed If it kills at least one target.
* ไฟล์:Kha'ZixSquare.png Kha'Zix's Evolved Wings Evolved Wings cooldown is refreshed if Kha'Zix gets a champion kill or assist.
* ไฟล์:RyzeSquare.png Ryze's Overload Overload cooldown is refreshed by using his other abilities.
* ไฟล์:TristanaSquare.png Tristana's Rocket Jump Rocket Jump cooldown is refreshed whenever Tristana gets a champion kill or assist.
* ไฟล์:TwitchSquare.png Twitch's Ambush Ambush cooldown is refreshed if an enemy dies while affected by Deadly Venom Deadly Venom.

## Trivia

[Last updated 09/05/2016 on patch 6.9]

One cost and efficient way to reach maximum CDR *(45%)* is:

* First of all, by maxing out the Intelligence Intelligence mastery which will provide **5% CDR** and raise the CDR cap to 45%.
* Then, by including **10% CDR** in your rune pages.
* Then by buying the Ionian Boots of Lucidity Ionian Boots of Lucidity which will provide **10% CDR**.
* And finally by purchasing a **20% CDR–item**, the cheapest being the Athene's Unholy Grail Athene's Unholy Grail (แม่แบบ:G).
	+ **20% CDR–items**:
		- Athene's Unholy Grail Athene's Unholy Grail – แม่แบบ:G
		- Iceborn Gauntlet Iceborn Gauntlet – แม่แบบ:G
		- Frozen Heart Frozen Heart – แม่แบบ:G
		- Morellonomicon Morellonomicon – แม่แบบ:G
		- Nashor's Tooth Nashor's Tooth – แม่แบบ:G
		- The Black Cleaver The Black Cleaver – แม่แบบ:G

The most cooldown reduction any champion can obtain at level 1 is **40%**. To achieve this you must :

* Max out the Intelligence Intelligence mastery which will provide **5% CDR** and raise the CDR cap to 45%.
* Have the แม่แบบ:Bi from the ไฟล์:Blue SentinelSquare.png Blue Sentinel (**10% CDR**)
* Have a full CDR rune page:
	+ 9 Marks of Cooldown Reduction ({{#vardefine:n|0.2}}0.2แม่แบบ:Times9 = **{{#vardefine:n|1.8}}1.8% CDR**)
	+ 9 Seals of Cooldown Reduction ({{#vardefine:n|0.36}}0.36แม่แบบ:Times9 = **{{#vardefine:n|3.24}}3.24% CDR**)
	+ 9 Glyphs of Cooldown Reduction ({{#vardefine:n|0.83}}0.83แม่แบบ:Times9 = **{{#vardefine:n|7.47}}7.47% CDR**)
	+ 3 Quintessences of Cooldown Reduction ({{#vardefine:n|2.5}}2.5แม่แบบ:Times3 = **{{#vardefine:n|7.5}}7.5% CDR**)
* Buy Ancient Coin Ancient Coin (**5% CDR**)

Relevant mathematics:
(This value is actually {{#vardefine:n|40.01%}}40.01%, but in-game value is displayed rounded)

แม่แบบ:Stats

cs:Cooldown reduction
de:Abklingzeitverringerung
es:Reducción de enfriamiento
fr:Réduction des délais de récupération
pl:Skrócenie czasu odnowienia
ru:Сокращение перезарядки
zh:冷却缩减