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Cooldown reduction

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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 item.png Stinger, you will have 15% cooldown reduction.

  • Cooldown reduction cannot be increased beyond 40%
    • Unless you have the Expanded Mind mastery s4.png 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 item.png Locket of the Iron Solari or item passive effects with cooldowns such as that of Guardian Angel item.png 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 item.png Distortion for boots. Cooldown Reduction does not apply to an Innate Ability of any kind.

Although not a basic item, Kindlegem item.png Kindlegem is the item from which the cooldown reduction gold value is derived. From this item derives a value of approximately 26.666∞ Gold per percentage of cooldown reduction. This yields 266.66∞ Gold for items with 10% CDR, 400 Gold for 15% CDR, and 533.33∞ Gold for 20% CDR.

Increasing cooldown reduction

Items

Item Cost Amount Availability
Abyssal Scepter item.png Abyssal Scepter2750 Gold10 %Common
Ancient Coin item.png Ancient Coin350 Gold5 %Common
Ardent Censer item.png Ardent Censer2400 Gold10 %Common
Athene's Unholy Grail item.png Athene's Unholy Grail2250 Gold20 %Common
Banner of Command item.png Banner of Command2900 Gold10 %Common
Caulfield's Warhammer item.png Caulfield's Warhammer1100 Gold10 % (Unique)Common
Death's Dance item.png Death's Dance3500 Gold10 %Common
Essence Reaver item.png Essence Reaver3600 Gold10 % (Unique)Common
Eye of the Oasis item.png Eye of the Oasis2200 Gold10 %Summoner's Rift
Eye of the Watchers item.png Eye of the Watchers2200 Gold10 %Summoner's Rift
Face of the Mountain item.png Face of the Mountain2200 Gold10 %Common
Fiendish Codex item.png Fiendish Codex900 Gold10 % (Unique)Common
Forbidden Idol item.png Forbidden Idol850 Gold10 % (Unique)Common
Frost Queen's Claim item.png Frost Queen's Claim2200 Gold10 %Common
Frozen Heart item.png Frozen Heart2800 Gold20 %Common
Glacial Shroud item.png Glacial Shroud1000 Gold10 % (Unique)Common
Globe of Trust item.png Globe of Trust2100 Gold20 %Black Market Brawlers
Hextech Protobelt-01 item.png Hextech Protobelt-012500 Gold10 %Common
Iceborn Gauntlet item.png Iceborn Gauntlet2700 Gold20 %Common
Ionian Boots of Lucidity item.png Ionian Boots of Lucidity900 Gold10 % (Unique)Common
Kindlegem item.png Kindlegem800 Gold10 % (Unique)Common
Lich Bane item.png Lich Bane3200 Gold10 %Common
Locket of the Iron Solari item.png Locket of the Iron Solari2500 Gold10 %Summoner's Rift
Lord Van Damm's Pillager item.png Lord Van Damm's Pillager3300 Gold10 %Twisted Treeline
Martyr's Gambit item.png Martyr's Gambit1850 Gold10 %Black Market Brawlers
Mikael's Crucible item.png Mikael's Crucible2400 Gold10 %Summoner's Rift, Howling Abyss
Morellonomicon item.png Morellonomicon2900 Gold20 % (Unique)Common
Murksphere item.png Murksphere365 Gold5 %Black Market Brawlers
Nashor's Tooth item.png Nashor's Tooth3000 Gold20 % (Unique)Common
Netherstride Grimoire item.png Netherstride Grimoire3000 Gold20 %Black Market Brawlers
Nomad's Medallion item.png Nomad's Medallion850 Gold10 %Common
Ohmwrecker item.png Ohmwrecker2650 Gold10 %Summoner's Rift
Pox Arcana item.png Pox Arcana3000 Gold20 %Black Market Brawlers
Puppeteer item.png Puppeteer2200 Gold20 %Black Market Brawlers
Rite of Ruin item.png Rite of Ruin3000 Gold20 %Black Market Brawlers
Sheen item.png Sheen1050 Gold10 %Common
Spirit Visage item.png Spirit Visage2800 Gold10 %Common
Stinger item.png Stinger1100 Gold10 % (Unique)Common
Swindler's Orb item.png Swindler's Orb865 Gold10 %Black Market Brawlers
Talisman of Ascension item.png Talisman of Ascension2500 Gold10 %Common
The Black Cleaver item.png The Black Cleaver3100 Gold20 %Common
Trinity Force item.png Trinity Force3733 Gold20 %Common
Warmog's Armor item.png Warmog's Armor2850 Gold10 % (Unique)Common
Warrior item.png Warrior1625 Gold10 %Classic
Youmuu's Ghostblade item.png Youmuu's Ghostblade3200 Gold10 %Common
Zeke's Harbinger item.png Zeke's Harbinger2350 Gold10 %Common
Zhonya's Hourglass item.png Zhonya's Hourglass2900 Gold10 %Summoner's Rift, Howling Abyss

Champion abilities

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

Masteries

  • Expanded Mind mastery s4.png Intelligence increases cooldown reduction and the cap by 1 / 2 / 3 / 4 / 5%.

Runes

Name Type Tier 1 (Lesser) Tier 2 (Normal) Tier 3 (Greater)
Cooldown reduction Mark

GMarks (1)

X X 0.2 %

410 IP

Seal

GSeals (1)

X X 0.36 %

410 IP

Glyph

GGlyphs (1)

0.47 %

N/A

0.67 %

1 IP

0.83 %

820 IP

Quintessence

GQuintessences (1)

1.4 %

N/A

1.95 %

1 IP

2.5 %

2050 IP

Cooldown Reduction, Scaling

(Cooldown Reduction per level)

Mark X X X
Seal X X X
Glyph

GGlyphs (2)

X X 0.09 % per level (1.67 %)

410 IP

Quintessence

GQuintessences (2)

X X 0.28 % per level (5 %)

1025 IP

Neutral buffs

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

Flat reduction

Percentage reduction

  • Gnar Gnar's Boomerang Throw.png Boomerang Throw cooldown is reduced by 45 / 50 / 55 / 60% if he can catch it when its return (scales with GNAR!.png GNAR!'s level).
    • Boulder Toss.png Boulder Toss cooldown is reduced by 60% if he picks up his boulder after using the ability.
  • Master Yi Master Yi's Highlander.png 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.
  • Nidalee Nidalee's Pounce.png Pounce base cooldown is reduced by 70% while it's currently higher if it kills a unit, or if Pounce.png Pounce hits an enemy marked as Prowl.png Hunted.
  • Sona Sona's Crescendo.png Crescendo decreases cooldowns of her basic abilities by 20 / 30 / 40%.
  • Yasuo Yasuo's Steel Tempest.png Steel Tempest's cooldown is reduced by 1% for every 1.72% bonus attack speed he has.
  • Cho'Gath Cho'Gath's Feast.png Feast's cooldown is reduced by 50% if it kills a minion or monster.

Cooldown refreshing

Trivia

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

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


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

Relevant mathematics:
5 + 10 + 1.8 + 3.24 + 7.47 + 7.5 + 5  = 40%
(This value is actually 40.01%, but in-game value is displayed rounded)


Start a Discussion Discussions about Cooldown reduction

  • Does CDR stack or go off of base?

    3 messages
    • Because it's additional, it will take 25% of the base cooldown.
    • Cooldown reduction is based on the collective percent, not a percent of a reduced percent. 10 second cooldown: With 5% CDR: -0.5% = 9.5 sec...
  • Is it just me, or did the price of Cooldown Reduction just go down?

    3 messages
    • CDR has never been at a static price per %. The thing about CDR is that it's priced differently for different roles. Very few APs are going...
    • Nothing's changed at all. There's only four items in the game that provide CDR and don't have any other non-measurable factors to them, and tha...

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