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For the successor stat, see ability haste.
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This article or section may contain obsolete information, but exists here for historical purposes.

Cooldown icon Cooldown Reduction (CDR) was a statistic that reduced the cooldown of champion abilities. It did not affect static cooldowns nor on-target cooldowns, unless it was otherwise stated. Other forms of cooldown reduction existed for items, summoner spells, and specifically ultimate abilities.

Cooldown reduction was gained by items, runes, and buffs. It was capped at 40%, increased to 45% with Cosmic Insight Cosmic Insight.

The formula for cooldown reduction was: Base Cooldown × (1 − CDR ÷ 100)

Gold Value ​​​

  • Cooldown reduction had a gold value of 26 26.67 per point.

Increasing cooldown reduction[]

Items[]

Unnamed Cooldown Reduction[]

Various items granted cooldown reduction.

Named Cooldown Reduction[]

Runes[]

Neutral Buffs[]

Other cooldown reduction[]

Ultimate abilities[]

Notes

Items[]

Notes
  • Cosmic Insight Cosmic Insight and Ingenious Hunter Ingenious Hunter stack additively with each other.
  • Multiple copies of the same active ability item, and unique named active share a global cooldown.
    • Purchasing yet another copy while the already owned ones are still on cooldown will make the newest one's sync up with the others'.

Summoner spells[]

Trivia[]

Highest CDR[]

Last updated: December 15th, 2019 – V9.24

One cost efficient way to have reached maximum CDR (45%) was:

The most cooldown reduction any champion could have obtained at level 1 with 500 Gold 500 was 15%. To achieve this a champion must:

Relevant mathematics:
5% + 10%  = 15%
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