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Attack speed (AS or ASPD) is a stat that is the frequency of a unit's basic attacks. They are measured and displayed as attacks per second.

Each champion starts with a certain base attack speed. Additional bonus attack speed can be obtained through level-up or with a variety of items, abilities and runes. Some champions can even start with bonus attack speed at level 1. Bonus attack speed stacks additively, and each bonus point acquired directly affects its statistic. Bonus attack speed is a percentage of the base attack speed, therefore, champions with higher base attack speed benefit more from bonus attack speed.

Attack speed is capped at 2.5 attacks per second (or 1 attack every 0.4 seconds), but it can be removed with certain effects.

Gold Value ​​​

• Attack speed has a gold value of 25 per point.

Calculations

Bonus attack speed per level

Champions gain an attack speed percentage every time they level up, which ranges from roughly 0 - 6% (the exact number depending on the specific champion) and can be calculated through the statistics growth formula.

Bonus AS% stacks additively.

Example: grants +35% attack speed and  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

• base attack speed is 0.651.
• Calculating "bonus attack speed":
• Every time levels up, he gains bonus AS% based on his percentage growth 3.22% and his level through the statistics growth formula.
• At level 10 he has gained $\pagecolor{Black}\color{White}3.22\%\times(10-1)\times(0.7025+0.0175\times(10-1)))=24.9228\%$ as bonus AS%.
• Let's say he has maxed increasing his attack speed by 30%.
• He also has the rune to 3%.
• And he has : +35%.
• All together he has: 24.9228% + 30% + 3% + 35% = 92.9228% bonus AS% or 0.929228 bonus AS as a decimal.
• Final calculation:
\pagecolor{Black}\color{White}\begin{align} & 0.651 \times (1 + 0.929228) \\ \approx & 1.255927 \end{align}
• In game, the number will be shown as: 1.256.

Removing the attack speed cap

The following game elements can remove the 2.5-attacks per second cap, potentially allowing infinite amounts of attacks per second.

Attack speed as scaling

The major part of champion abilities that use attack speed will scale with base attack speed. But some abilities scale with the total or bonus attack speed the champion has.

Increasing attack speed

Items

Item Cost Amount Availability
1100 35 %All maps
3200 25 %All maps
2625 50 %Summoner's Rift, Twisted Treeline, Nexus Blitz
300 12 %All maps
3100 25 %All maps
800 15 %All maps
3200 40 %All maps
3000 50 %All maps
2700 45 %All maps
2800 30 %All maps
1000 25 %All maps
2800 40 %All maps
7337 50 %Nexus Blitz
2800 35 %All maps
1100 35 %All maps
2800 35 %All maps
3733 40 %All maps
3733 50 %All maps
2400 40 %All maps
1300 15 %All maps
2800 40 %Nexus Blitz

Decreasing attack speed

Attack speed reductions stack multiplicatively and take percentages off the final attack speed value after all bonus attack speed has been factored in. Attack speed reductions are affected by Tenacity, but not by Slow resist.

Capped attack speed

The majority of champions are capped at 2.5 attacks per second. But some champion abilities make it impossible to reach that cap:

List of champions' attack speed

Champions with the lowest or highest attack speed before items, runes, or abilities
Champion Level Top 5 champions Bottom 5 champions
Level 1 1. 0.799 AS 1. 0.49 AS
2. 0.749 AS 2. 0.571 AS
3.
3.
3.
3.
0.736 AS 3. 0.579 AS
4. 0.719 AS 4. 0.625 AS
5. 0.704 AS 5. 0.601 AS
Level 18 1. 1.263 AS 1. 0.707 AS
2. 1.166 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

Notes

• All percentages listed in a champion's attack speed statistic are approximations.
• Many abilities can scale indirectly with attack speed (for example, through the flat cooldown reduction per attack with ).

Trivia

Last updated: October 15, 2018 – V8.20

• The most attack speed a champion can have is 9.81875 with a level 18 .
• Base AS: 0.625 AS
• Items:
• One
• Five
• Runes:
• ( Precision secondary)
• Buffs:
• AS Amplification:
• Relevant mathematics:
• total AS:
• Items = + = 323% bonus AS
• Runes = + + = 148.5% bonus AS
• Buffs = + + + + + = 214% bonus AS
• total AS = (0.625 × (1 + 3.23 + 1.485 + 2.14)) ×  = 9.81875 total AS

Last updated: October 15, 2018 – V8.20

• The most attack speed a champion can reach at level 1 with the initial 500 is 3.44375 with .
• Base AS: 0.625 AS
• Item:
• One
• Runes:
• ( Precision secondary)
• (no stack)
• Buffs:
• AS Amplification:
• Relevant mathematics:
• total AS:
• Items = = 12% bonus AS
• Runes = + + = 83.5% bonus AS
• Buffs = + + + = 80% bonus AS
• total AS = (0.625 × (1 + 0.12 + 0.835 + 0.8)) ×  = 3.44375 total AS
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