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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 2.5 attacks per second (or 1 attack every two fifths of a second, or 0.4 seconds).

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, buffs, and abilities. Some items and abilities (only those two) decrease enemy attack speed.

## Calculations

### Base attack speed

Every champion's base attack speed (ASbase) is calculated using a hidden variable called attack delay,[1] which ranges from −0.10 to 0.3. As ASbase is the value that is modified by bonus attack speed, and the amount shown at level 1 for most champions (excepting those with bonus attack speed at level 1), it is the value shown on the League of Legends Wiki.

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

### Bonus attack speed sources

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 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.

### Example

• 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, 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 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

### Items

Item Cost Amount Availability
1100  35 %Common
3400  25 %Common
1625  50 %Classic
300  12 %Common
3600  25 %Common
800  15 %Common
3000  50 %Common
2600  45 %Common
2600  30 %Common
1000  25 %Common
2600  40 %Common
2600  35 %Common
1100  35 %Common
3733  40 %Common
4733  50 %Common
2500  40 %Common
1200  15 %Common
• : Passive: Unique: Heals and shields on allied champions (excluding yourself) enhance your basic attacks and theirs for 6 seconds. Granting you and them +10% - 30% (based on target's level) attack speed and 5 - 20 (based on target's level) bonus on-hit magic damage.
• : +25% attack speed. Passive: Unique: Basic attacks grant +8% attack speed, and for 5 seconds, stacking up to 6 times, granting a total of +48% attack speed, +18 attack damage and +24 ability power. At 6 stacks, gain Guinsoo's Rage.

### 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.

Champion's ability Bonus type Bonus Notes
Passive 30% / 40% / 50% / 60% When under the effect of Hellbent.
Active 40 / 50 / 60% Duration: 12 seconds.
Cooldown: 100 / 85 / 70 seconds.
Active 20 / 25 / 30 / 35 / 40% Duration: 4 seconds.
Require: 4 Focus stacks.
Passive 20 / 30 / 40 / 50 / 60%
Active 30 / 38 / 46 / 54 / 62% Duration: 5 seconds.
Cooldown: 15 seconds.
Passive 20% / 50% / 60% / 70% / 80% / 90% After casting an ability, on her 3 next basic attacks.
Active 20 / 25 / 30 / 35 / 40% Duration: 3 seconds.
Cooldown: 12 seconds.
Catching an resets Blood Rush's cooldown.
Active 60 / 80 / 10 / 120 / 140% Duration: 3 seconds.
Cooldown: 12 seconds.
Also passively increases attack speed by the same amount.
Passive 10 / 12 / 14%
(Max: 50 / 60 / 70%)
Duration: 6 seconds.
After casting an ability. Stacks up to 5 times.
Active Increases allied champion attack speed by 20 / 25 / 30 / 35 / 40% Duration: 5 seconds.
Cooldown: 9 seconds.
Active 50% Duration: 4 seconds.
Cooldown: 13 / 11 / 9 / 7 / 5 seconds.
On her two next basic attack.
Passive 5.5 - 99 (based on level)% While in form.
Active 20 / 30 / 40 / 50 / 60% Duration: 3 seconds.
Cooldown: 22 / 19.5 / 17 / 14.5 / 12 seconds.
Passive 15 / 17.5 / 20 / 22.5 / 25%
Active Increases allied champion attack speed by 15 / 17.5 / 20 / 22.5 / 25% Duration: 8 seconds.
Cooldown: 13 / 12.5 / 12 / 11.5 / 11 seconds.
When near the flag.
Passive 3.5 / 5 / 6.5 / 8 / 9.5 / 11%
(Max: 28 / 40 / 52 / 64 / 76 / 88%)
Duration: 2.5 seconds.
When basic attacking. Stacks up to 8 times.
Active Sets attack speed to 2.5. Duration: 4 seconds.
On his next 3 basic attacks.
Passive 15% total attack speed. Duration: 6 seconds.
Upon a champion or structure takedown within 3 seconds. Stacks infinitely.
Passive Max: 0% - 70% (based on level) plus 30 / 40 / 50 / 60 / 70%. Duration: 2.5 seconds.
When basic attacking with Pow-Pow. Stacks up to 3 times.
Passive 150% Duration: 4 seconds.
Cooldown: 14 / 12.5 / 11 / 9.5 / 8 seconds.
On his next 4 basic attacks.
Passive 15 / 20 / 25 / 30 / 35%
Passive 40% Duration: 3 seconds.
After casting an ability. On his next 2 basic attacks.
Active Increases allied champion attack speed by 25 / 30 / 35 / 40 / 45% Duration: 3 / 3.25 / 3.5 / 3.75 / 4 seconds.
Cooldown: 16 / 15 / 14 / 13 / 12 seconds.
Active 30 / 55 / 80% total attack speed. Duration: 7 seconds.
Cooldown: 85 seconds.
Kills and assists extends the duration by 7 seconds.
Active 40 / 55 / 70 / 85 / 100% Duration: 6 seconds.
Cooldown: 12 seconds.
Active Increases allied champion attack speed by 20 / 30 / 40 / 50 / 60% Duration: 7 seconds.
Cooldown: 12 seconds.
Passive 20 / 25 / 30 / 35 / 40%
Active 40 / 50 / 60 / 70 / 80% Duration: 5 seconds.
Cooldown: 20 / 18 / 16 / 14 / 12 seconds.
Upon blocking a spell within 1.5 seconds.
Active Increases his own and allied champion attack speed by 25 / 30 / 35 / 40 / 45% Duration: 12 seconds.
Cooldown: 15 seconds.
Passive 1% per 1% of his missing health
Active 40 / 50 / 60 / 70 / 80% Duration: 6 seconds.
Cooldown: 16 seconds.
Passive 20 / 35 / 50 / 65 / 80% Duration: 2 seconds.
When attacking a target.
Active 50% Duration: 8 seconds.
Cooldown: 8 / 7.25 / 6.5 / 5.75 / 5 seconds.
On his next 3 basic attacks. When his Spirit Blade collides with an enemy champion.
Passive 30 / 45 / 60% While is active.
Passive 100% total attack speed. Duration: 4 seconds.
When casting an ability. On his next 2 basic attacks.
Passive 20 / 40 / 60 / 80% Duration: 3 seconds.
After leaving stealth.
Active 30 / 50 / 70 / 90 / 110% Duration: 7 seconds.
Cooldown: 20 / 19 / 18 / 17 / 16 seconds.
Active 20 / 35 / 50 / 65 / 80% Cooldown: 15 seconds.
While in the frozen area.
Passive 10 / 15 / 20 / 25 / 30%
Active 30 / 35 / 40 / 45 / 50% Duration: 5 seconds.
Cooldown: 16 seconds.
After leaving stealth.
Passive 10% (Max: 30%) Duration: 5 seconds.
When changing stance. Stacks up to 3 times.
Active 30 / 40 / 50 / 60 / 70% Duration: 5 seconds.
Cooldown: 6 seconds.
Passive 40% (+ 50% bonus attack speed)
(Minion or monster kill: 20% (+ 25% bonus attack speed))
Duration: 5 seconds.
On champion takedown. Attack speed halved for minions and monsters kills.
Passive 30 / 35 / 40 / 45 / 50% Duration: 4 seconds.
After attacking the same target 3 times.
Passive 4 / 8 / 12 / 16 / 20% (Max: 12 / 24 / 36 / 48 / 60%) Duration: 4 seconds.
When basic attacking. Stacks 3 times.
Passive 50 / 65 / 80 / 95 / 110% (Max: 150 / 195 / 240 / 285 / 330%) Against targets below 50% of their maximum health. Attack speed tripled against targets below 20% of their maximum health.
Active 30 / 35 / 40 / 45 / 50% Duration: 4 seconds.
Cooldown: 8 seconds.
After hitting a target with this ability.
Active 40 / 50 / 60 / 70 / 80% Duration: 5 seconds.
Cooldown: 16 / 15 / 14 / 13 / 12 seconds.

## Reducing attack speed

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

• : Passive: Unique – Cold Steel: When hit by basic attacks, source's attack speed by 15% for 1 second.
• : Passive: Unique – Cold Steel: When hit by basic attacks, source's attack speed by 15% for 1 second.
• : Passive: Unique – Cold Steel: When hit by basic attacks, source's attack speed by 15% for 1 second.
• : Aura: Unique: nearby enemies' attack speed by 15% (700 range).

### 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.

• slows affected enemy champion's attack speed by 50% for 1.5 seconds.
• slows affected units' attack speed by 30 / 35 / 40 / 45 / 50% for 3 seconds.
• reduces an enemy unit's attack speed by 17.5% plus an additional 1.5 / 3 / 4.5 / 6 / 7.5% per second for 5 seconds, for a total of 23.5 / 29.5 / 35.5 / 41.5 / 47.5%.
• reduces an enemy unit's attack speed by 25% for 3 seconds.
• slows the attack speed of all nearby enemy units by 25% while channeling for 3 seconds.

## Notes

(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

The highest and lowest base attack speed champions.
Champion Level Top 5 champions Bottom 5 champions
Level 1 1. 0.798 AS 1. 0.481 AS
2. 0.749 AS 2. 0.571 AS
3.
3.
3.
3.
0.734 AS 3. 0.579 AS
4.
4.
0.719 AS 4. 0.595 AS
5. 0.705 AS 5. 0.601 AS
Level 18 1. 1.263 AS 1. 0.694 AS
2. 1.105 AS 2. 0.713 AS
3. 1.102 AS 3.
3.
0.731 AS
4. 1.089 AS 4. 0.745 AS
5. 1.086 AS 5.
5.
5.
5.
5.
5.
5.
5.
0.77 AS

## Trivia

Last updated: November 21, 2017 – V7.23

• The most attack speed a champion can reach at level 1 with the initial  500 is 3.1625 with .
• Base AS: 0.625 AS
• Item:
• One
• Runes:
• (no stack)
• Buffs:
• AS Amplification:
• Relevant mathematics:
• total AS:
• Items =  = 12% bonus AS
• Runes =  +  +  = 51% bonus AS
• Buffs =  +  +  +  +  = 90% bonus AS
• total AS = (0.625 × (1 + 0.12 + 0.51 + 0.9)) ×  = 3.1625 total AS

Last updated: December 14th, 2017 – V7.24b

• The most attack speed a champion can reach at level 1 without any active buffs, with the initial  500 is 1.041 with .
• Base AS: 0.694 AS
• Item:
• One
• Runes:
• ( secondary)
• (no stack)
• Passive Buffs:
• passive starting attack speed.
• Relevant mathematics:
• total AS:
• Items =  = 12% bonus AS
• Runes =  +  = 23% bonus AS
• Buffs =  = 15% bonus AS
• total AS = 0.694 × (1 + 0.12 + 0.23 + 0.15) = 1.041 total AS

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