Attack speed

Attack speed (often shortened as AS or ASPD) is the frequency at which a champion performs basic attacks and are displayed as "attacks per second". Attack speed caps at 2.5 attacks per second, or 1 attack every two fifths of a second.

Attack speed bonuses works by adding a percentage of a champion's base attack speed to his or her "base attack speed." Champions with a low base attack speed will receive less of an attack speed boost from the bonus than champions with a high base attack speed, but the proportional increase in DPS will remain the same for both. One's attack speed can be increased via leveling up, items, runes, masteries, buffs, and abilities. One's attack speed can only be decreased by items, abilities, and the Dragon Dragon.

Calculations

Base attack speed

Every champion's "base attack speed" (AS_base) is calculated using a hidden variable called "attack delay." Attack delay is a number between −0.10 and 0.08:

AS_base = 0.625 ÷ (1 + attack delay)

This value is the total number shown at level 1 without runes, masteries, etc. It is represented this way throughout the wiki.

The bonus AS% can come from 6 sources:

• Champions gain AS% at each level, not including level 1. This amount ranges from roughly 0% to 4% and depends on the champion.
• Items
• Champion abilities
• The Template:Mi mastery
• The Template:Mi mastery
• Template:Rune runes

Bonus AS% stacks additively.

Example: Stinger grants +40% attack speed and Malady grants +45% attack speed, so the champion gains +85% in total.

Notes:

• Final attack speed cannot go above the cap of 2.5 attacks per second.

• Many in-game tooltip percentages (such as runes) have been rounded, so results may be slightly different unless the precise numbers are known.

Calculation example

• Calculating "base attack speed":
  • Twisted Fate's attack delay = −0.04.
  • 0.625 ÷ (1 − 0.04) = 0.625 ÷ 0.96 = 0.6510416. This is Twisted Fate's base attack speed, seen at level 1 (without runes, masteries, etc).
  • The number seen in game is rounded to 3 decimal places: 0.651.
• Calculating "bonus attack speed":
  • Every time Twisted Fate levels up, he gains 3.22% as bonus AS%.
    • At level 18 he has gained 3.22% × 17 = 54.74% as bonus AS%.
  • At 18 he has maxed Stacked Deck increasing his attack speed by 15%.
  • Let's say he has the Template:Mi mastery up to 4%.
  • Let's also say he has Phantom Dancer: +50%.
  • All together he has: 54.74% + 15% + 4% + 50% = 123.74% as bonus AS% or 1.2374 bonus AS as a decimal.
• Final calculation:
  • (0.625 ÷ 0.96) × (1 + 1.2374).
  • 0.6510416 × 2.2374 = 1.456640625.
  • In game, the number will be shown as: 1.457.

Increasing attack speed

Items

Core

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Dominion

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Twisted Treeline

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Champion abilities

Note: Only the attack speed buff effect of these abilities is shown here, to read more information on each of these abilities, follow the link on each of them.

• Blitzcrank's Overdrive increases his attack speed by 30% / 38% / 46% / 54% / 62% for 8 seconds.
• Diana's Moonsilver Blade passively grants Diana 20% bonus attack speed.
• Draven's Blood Rush increases his attack speed by 20% / 25% / 30% / 35% / 40% for 3 seconds.
• Elise's Skittering Frenzy increases the attack speed of herself and her Spiderlings by 60% / 80% / 100% / 120% / 140% for 3 seconds
• Evelynn's Ravage increases her attack speed by 60% / 75% / 90% / 105% / 120% for 3 seconds after attacking with Ravage.
• Ezreal's Rising Spell Force passively increases his attack speed by 10% whenever he hits a target with any of his abilities. This bonus lasts for 6 seconds and stacks up to 5 times.
• Ezreal's Essence Flux increases the attack speed of allied champions it passes through by 20% / 25% / 30% / 35% / 40% for 5 seconds.
• Fiora's Burst of Speed increases her attack speed by 60% / 75% / 90% / 105% / 120% for 3 seconds.
• Graves' Quickdraw increases his attack speed by 30% / 40% / 50% / 60% / 70% for 4 seconds.
• Jarvan IV's Demacian Standard passively increases his attack speed by 10% / 13% / 16% / 19% / 22%. When activated, it throws a flag that increases nearby allied champions and his own attack speed again by the same amount.
• Jax's Relentless Assault causes his basic attacks to increase his attack speed by . This bonus lasts for 2.5 seconds and stacks up to six times.
• Jayce's Hyper Charge increases his attack speed to 2.5 (the maximum) for three basic attacks.
• Kassadin's Void Stone reduces magic damage taken by 15% and transforms this damage into bonus attack speed. This effect stacks individually and each individual buff lasts up to 4 seconds.
• Kog'Maw's Caustic Spittle passively increases his attack speed by 10% / 15% / 20% / 25% / 30%.
• Lee Sin's Flurry increases the attack speed by 40% of his next two 2 autoattacks within the next three seconds after casting an ability.
• Master Yi's Highlander increases his attack speed by 40% / 60% / 80% for 8 / 10 / 12 seconds.
• Miss Fortune's Impure Shots increases her attack speed by 30% / 35% / 40% / 45% / 50% for 6 seconds.
• Nidalee's Primal Surge increases her or an allied unit's attack speed by 20% / 30% / 40% / 50% / 60% for 7 seconds.
• Nocturne's Shroud of Darkness passively grants himself 20% / 25% / 30% / 35% / 40% attack speed. Upon activation, it summons a spell shield for 1.5 seconds, if the shield successfully blocks a spell, the attack speed bonus is doubled for 5 seconds.
• Nunu's Blood Boil increases an allied unit's and his own attack speed by 25% / 30% / 35% / 40% / 45% for 12 seconds.
• Olaf's Berserker Rage passively increases his attack speed by 1% per 1% health he is missing.
• Rengar's Savagery increases his attack speed by 30% / 35% / 40% / 45% / 50% for 4 seconds, while his Empowered Savagery increases his attack speed by 60% / 70% / 80% / 90% / 100% for 4 seconds. These effects can stack for a total of 90% / 105% / 120% / 135% / 150%.
• Sion's Cannibalism increases his attack speed by 50% for 20 seconds.
• Sivir's On The Hunt On The Hunt grants her an aura for 10 seconds that increases her attack speed by 30% / 45% / 60% and one half of that to nearby allies.
• Skarner's Crystalline Exoskeleton grants him a shield for up to 6 seconds, while the shield persists Skarner increases his attack speed by 30% / 35% / 40% / 45% / 50%.
• Teemo's Camouflage increases his attack speed by 40% for 3 seconds after leaving his stealth state.
• Tristana's Rapid Fire increases her attack speed by 30% / 45% / 60% / 75% / 90% for 7 seconds.
• Trundle's Contaminate infects the target location for 8 seconds, while on this area, Trundle increases his attack speed by 20% / 30% / 40% / 50% / 60%.
• Twisted Fate's Stacked Deck passively increases his attack speed by 3% / 6% / 9% / 12% / 15%.
• Twitch's Ambush increases his attack speed by 30 / 40% / 50% / 60% / 70% for up to 5 seconds after revealing himself.
• Udyr's Monkey's Agility increases his attack speed by 10% upon switching stances. This bonus lasts for 5 seconds and stacks up to 3 times.
• Udyr's Tiger Stance increases his attack speed by 20% / 25% / 30% / 35% / 40% while the stance is active, and for additional 15% / 20% / 25% / 30% / 35% for 5 seconds on activation.
• Varus' Living Vengeance increases attack speed by 20% for 3 seconds on minion kills, while a champion kill/assist will grant 40% for 6 seconds.
• Vi's Denting Blows will increase Vi's attack speed by 30% / 35% / 40% / 45% / 50% for 4 seconds after attacking the same target 3 times.
• Volibear's Frenzy passively causes his autoattacks to increase his attack speed by 8% / 11% / 14% / 17% / 20%. This bonus stacks up to 3 times and lasts for 4 seconds.
• Warwick's Hunters Call Hunters Call increases his attack speed by 40% / 50% / 60% / 70% / 80% and half of that amount to nearby allied champions for 10 seconds.
• Wukong's Nimbus Strike increases his attack speed by 30% / 35% / 40% / 45% / 50% after hitting a target with this skill.
• Xin Zhao's Battle Cry increases his attack speed by 40% / 50% / 60% / 70% / 80% for 5 seconds.

Masteries

• Template:Mi increases your champion's attack speed by 1% / 2% / 3% / 4%.
• Template:Mi grants 10% attack speed to your champion for 2 seconds after landing a critical hit.

Runes

• Template:Rune runes increase attack speed.

Name	Type	Tier 1 (Lesser)	Tier 2 (Normal)	Tier 3 (Greater)
Attack Speed	Mark	0.94% 30 Influence Point	1.32% 165 Influence Point	1.7% 410 Influence Point
	Seal	0.42% 30 Influence Point	0.59% 165 Influence Point	0.76% 410 Influence Point
	Glyph	0.35% 30 Influence Point	0.5% 165 Influence Point	0.64% 410 Influence Point
	Quintessence	1.89% 80 Influence Point	2.64% 410 Influence Point	3.4% 1025 Influence Point

Decreasing attack speed

Note: Attack speed reductions stack multiplicatively (with the sole exception of Randuin's Omen's passive), and take percentages off the final attack speed value after all bonus attack speed has been factored in.

Items

• Frozen Heart: Unique Aura: Reduces the attack speed of nearby enemies by 20%.
• Randuin's Omen: Unique Passive - Cold Steel: If you are hit by a basic attack, you slow the attacker's attack speed by 20% and their movement speed by 10% for 1.5 seconds.
• Warden's Mail: Unique Passive - Cold Steel: If you are hit by a basic attack, you slow the attacker's attack speed by 20% for 1.5 seconds.

Champion abilities

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

• Anivia's Glacial Storm slows affected units' attack speed by 20% for 1 second.
• Darius' Crippling Strike slows affected unit's attack speed by 20% / 25% / 30% / 35% / 40% for 2 seconds.
• Gragas' Barrel Roll slows affected units' attack speed by 20% / 25% / 30% / 35% / 40% for 3 seconds.
• Lee Sin's Cripple slows affected units' attack speed by 30% / 37.5% / 45% / 52.5% / 60% for 4 seconds.
• Malphite's Ground Slam slows affected units' attack speed by 30% / 35% / 40% / 45% / 50% for 3 seconds.
• Nasus' Wither reduces an enemy unit's attack speed by 35% plus an additional 3% / 6% / 9% / 12% / 15% per second for 5 seconds.
• Nunu's Ice Blast reduces an enemy unit's attack speed by 25% for 3 seconds.
• Nunu's Absolute Zero slows the attack speed of all nearby enemy units by 25% while channeling for 3 seconds.

Neutral monsters

• The Dragon Dragon attacks will slow the attacked champion's attack speed by 20% for 4 seconds.

Notes

• All percentages listed in a champion's attack speed statistic are approximations.
• Attack speed reduction duration is not affected by tenacity. However if attack speed reduction is in one ability with crowd control like Nunu's Ice Blast, then tenacity reduces its duration. So attack speed reduction is reduced by tenacity only along with other crowd control.

List of champions' attack speed

Main article: List of champions' attack speed

Champion statistics