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Attack speed (often shortened as AS or ASPD) is the frequency of a champion's basic attacks. They are measured and displayed as attacks per second.
• Attack speed cannot be increased beyond {{#vardefine:n|2.5}}2.5 attacks per second (or 1 attack every two fifths of a second, or {{#vardefine:n|0.4}}0.4 seconds).
• bypasses this limit (up to {{#vardefine:n|5.00}}5.00 attack per second).

Attack speed bonuses (from items or abilities, etc.) are in percent. The bonus is a percentage of the champions base attack speed. Therefore, champions with higher base attack speed benefit more from attack speed increases. Like all stats, one's attack speed can be increased via leveling up, items, runes, masteries, buffs, and abilities. Some items and abilities (only those two) decrease enemy attack speed.

## Calculations Edit

### Base attack speed Edit

Every champion's base attack speed (ASbase) is calculated using a hidden variable called attack delay,[1] which ranges from −{{#vardefine:n|0.10}}0.10 to {{#vardefine:n|0.08}}0.08. (ASbase) is the total number shown at level 1 without runes, masteries, etc. It is represented this way throughout the wiki.

$\pagecolor{Black}\color{White}{\it AS}_{\rm base} = {0.625 \over 1 + {\it attack\ delay}}$

### Bonus attack speed sources Edit

• Champions gain AS% at each level, not including level 1. This amount ranges from roughly 0% to 4% and depends on the champion. This amount depends on the level through the Statistics growth formula.
• Items
• Champion abilities
• Masteries
• Attack Speed runes

Example: grants +35% attack speed and also grants +50% attack speed, so the champion gains +85% in total.

Notes:

• Final attack speed cannot go above the cap of {{#vardefine:n|2.5}}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.

### ExampleEdit

• Calculating base attack speed:
• attack delay is −0.04.
• $\pagecolor{Black}\color{White}{0.625 \over (1 - 0.04)} = {0.625 \over 0.96} = 0.651041 \overline{6}$. This is 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 levels up, he gains bonus AS% based on percentage growth 3.22% and his level through the Statistics growth formula.
• At level 18 he has gained $\pagecolor{Black}\color{White}3.22\% \times\left({7 \over 400}\times(18^2-1)+{267\over400}\times(18-1)\right)=54.74\%$ as bonus AS%.
• At 18 he has maxed increasing his attack speed by 30%.
• Let's say he has the mastery up to 4%.
• Let's also say he has : +35%.
• All together he has: 54.74% + 30% + 4% + 35% = 123.74% bonus AS% or {{#vardefine:n|1.2374}}1.2374 bonus AS as a decimal.
• Final calculation:
\pagecolor{Black}\color{White}\begin{align} & {0.625 \over 0.96} + \left({{0.625 \over 0.96} \times 123.74\%}\right) \\ =& 0.651041\overline6 + ({0.651041 \times 123.74\%}) \\ \approx & 1.45664 \end{align}
• In game, the number will be shown as: 1.457.

## Increasing attack speed Edit

### Champion abilities Edit

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.

• passively increases his attack speed by แม่แบบ:Pp% for every 2% in the Blood Well.
• increases his attack speed by แม่แบบ:Ap for 5 seconds.
• passively grants Diana 20% bonus attack speed.
• increases his attack speed by แม่แบบ:Ap for 3 seconds.
• increases the attack speed of herself and her Spiderlings by แม่แบบ:Ap for 3 seconds.
• increases her attack speed by แม่แบบ:Ap for 3 seconds after attacking with .
• 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.
• increases the attack speed of allied champions it passes through by แม่แบบ:Ap for 5 seconds.
• increases her attack speed by 50% for her 2 next basic attacks.
• increases his attack speed by แม่แบบ:Pp18% when in .
• passively increases his attack speed by แม่แบบ:Ap. When activated, it throws a flag that increases nearby allied champions and his own attack speed by the same amount.
• causes his basic attacks to increase his attack speed by แม่แบบ:Pp%. This bonus lasts for {{#vardefine:n|2.5}}2.5 seconds and stacks up to eight times, falling off one stack at a time every 0.25 seconds.
• increases his attack speed to {{#vardefine:n|2.5}}2.5 for three basic attacks.
• causes her basic attacks to grant bonus attack speed for {{#vardefine:n|2.5}}2.5 seconds, stacking up to three times (up to แม่แบบ:Ap).
• grants her 15% total attack speed for 6 seconds whenever an enemy champion or structure dies within 3 seconds of being damaged by her.
• makes him periodically enter a frenzy that grants him 150% bonus attack speed on his next 4 attacks for 4 seconds.
• passively increases his attack speed by แม่แบบ:Ap, and, upon activation and for 6 seconds, double his total attack speed.
• increases the attack speed by 40% of his next two 2 autoattacks within the next three seconds after casting an ability.
• casts erratic magic upon the target champion, giving them แม่แบบ:Ap% bonus attack speed for the next few seconds if they are an ally.
• increases his attack speed by แม่แบบ:Ap for 7 seconds. Kills and assists extends the duration by 7 seconds.
• increases her attack speed by แม่แบบ:Ap for 6 seconds.
• increases her or an allied unit's attack speed by แม่แบบ:Ap for 7 seconds.
• passively grants himself แม่แบบ:Ap attack speed. Upon activation, it summons a spell shield for {{#vardefine:n|1.5}}1.5 seconds, if the shield successfully blocks a spell, the attack speed bonus is doubled for 5 seconds.
• increases an allied unit's and his own attack speed by แม่แบบ:Ap for 12 seconds.
• passively increases his attack speed by 1% per แม่แบบ:As.
• increases Quinn's attack speed by แม่แบบ:Ap for 3 seconds when she attacks a target marked by .
• passively grants her แม่แบบ:Ap% bonus attack speed.
• increases his attack speed by bonus 47 + (3แม่แบบ:TimesRengar's level) % for 5 seconds
• passively grants her แม่แบบ:Ap attack speed while is active.
• increases his attack speed by แม่แบบ:Pp% for 3 seconds after leaving his stealth state.
• increases her attack speed by แม่แบบ:Ap for 5 seconds.
• coats the target location with ice for 8 seconds, while on this area, Trundle increases his attack speed by แม่แบบ:Ap.
• passively increases his attack speed by แม่แบบ:Ap.
• increases his attack speed by แม่แบบ:Ap for up to 5 seconds after revealing himself.
• increases his attack speed by 10% upon switching stances. This bonus lasts for 5 seconds and stacks up to 3 times.
• increases attack speed by 20% for 3 seconds on minion kills, while a champion kill/assist will grant 40% for 6 seconds.
• will increase Vi's attack speed by แม่แบบ:Ap for 4 seconds after attacking the same target 3 times.
• passively causes his auto attacks to increase his attack speed by แม่แบบ:Ap. This bonus stacks up to 3 times and lasts for 4 seconds.
• increases his attack speed by แม่แบบ:Ap and half of that amount to nearby allied champions for 6 seconds.
• increases his attack speed by แม่แบบ:Ap after hitting a target with this skill.
• increases his attack speed by แม่แบบ:Ap for 5 seconds.

### Runes Edit

Name Type Tier 1 (Lesser) Tier 2 (Normal) Tier 3 (Greater)
Attack Speed Mark {{#vardefine:n|0.94}}0.94 %

N/A

{{#vardefine:n|1.32}}1.32 %

1 IP

{{#vardefine:n|1.7}}1.7 %

410 IP

Seal X X 0.76}}0.76 %

410 IP

Glyph X X 0.64}}0.64 %

410 IP

Quintessence {{#vardefine:n|2.52}}2.52 %

N/A

{{#vardefine:n|3.51}}3.51 %

1 IP

{{#vardefine:n|4.5}}4.5 %

1025 IP

## Reducing attack speed Edit

Note: Attack speed reductions stack multiplicatively and take percentages off the final attack speed value after all bonus attack speed has been factored in.

### Items Edit

• : Unique Aura: Reduces the attack speed of nearby enemies by 15%.
• : Unique Passive – แม่แบบ:Nie: If you are hit by a basic attack, you slow the attacker's attack speed by 15% for 1 second.
• : Unique Passive – แม่แบบ:Nie: If you are hit by a basic attack, you slow the attacker's attack speed by 15% for {{#vardefine:n|1}}1 second.

### Summoner Spells Edit

• : Active: Exhausts target enemy champion, reducing their movement speed and attack speed by 30%, their armor and magic resist by 10, and their damage dealt by 40% for {{#vardefine:n|2.5}}2.5 seconds.

### Champion abilities Edit

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.

• slows affected units' attack speed by 20% for 1 second.
• slows affected enemy champion's attack speed by 50% for 1.5 seconds.
• slows affected units' attack speed by แม่แบบ:Ap for 3 seconds.
• reduces an enemy unit's attack speed by {{#vardefine:n|17.5%}}17.5% plus an additional แม่แบบ:Ap per second for 5 seconds.
• slows the attack speed of all nearby enemy units by 25% while channeling for 3 seconds.
• reduces an enemy unit's attack speed by 25% for 3 seconds.

## Notes Edit

(bonus attack speed only) is the only ability that directly scales with a champion's attack speed statistic. Many other abilities can scale indirectly (for example, through the flat cooldown reduction per attack with ).

## List of champions' attack speed Edit

The highest and lowest base attack speed champions
Champion Level Top 5 champions Bottom 5 champions
Level 1 1. {{#vardefine:n|0.694}}0.694 AS 1. {{#vardefine:n|0.481}}0.481 AS
1.
1.
1.
1.
2. {{#vardefine:n|0.69}}0.69 AS 2. {{#vardefine:n|0.568}}0.568 AS
2.
3. {{#vardefine:n|0.679}}0.679 AS 3. {{#vardefine:n|0.571}}0.571 AS
3.
3.
3.
3.
3.
4. {{#vardefine:n|0.672}}0.672 AS 4. {{#vardefine:n|0.579}}0.579 AS
4.
5. {{#vardefine:n|0.67}}0.67 AS 5. {{#vardefine:n|0.601}}0.601 AS
5.
5.
5.
Level 18 1. 1.105}}1.105 AS 1. 0.678}}0.678 AS
2. 1.089}}1.089 AS 2. 0.712}}0.712 AS
3. 1.087}}1.087 AS 3. 0.717}}0.717 AS
4. 1.07}}1.07 AS 4. 0.731}}0.731 AS
5. {{#vardefine:n|1.06}}1.06 AS 5. {{#vardefine:n|0.731}}0.731 AS
5.
5.

## Trivia Edit

Last updated: September 7, 2016 – V6.17