# Attack speed

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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 (0.4 seconds).

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 certain items and abilities.

## 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 0.08. (ASbase) is the total number shown at level 1 without runes, masteries, etc. It is represented this way throughout the wiki.

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

### Bonus attack speed sources

Bonus AS% stacks additively.

Example: grants +40% attack speed and grants +50% attack speed, so the champion gains +90% 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.
• $${0.625 \over (1 - 0.04)} = {0.625 \over 0.96} = 0.651041\overline6$$. 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 3.22\% as bonus AS%.
• At level 18 he has gained $$3.22\% \times 17 = 54.74\%$$ as bonus AS%.
• At 18 he has maxed increasing his attack speed by 30%.
• Let's say he has the mastery up to 5%.
• Let's also say he has : +50%.
• All together he has: $$54.74\% + 30\% + 5\% + 50\% = 139.74\%$$ bonus AS% or 1.3974 bonus AS as a decimal.
• Final calculation:
\begin{align} & {0.625 \over 0.96}\times 239.74\% \\ =& 0.651041\overline6 \times 239.74\% \\ \approx & 1.56081 \end{align}
• In game, the number will be shown as: 1.561.

## Increasing attack speed

### Items

• : +25% attack speed. Unique Passive – Enhanced Movement: +45 movement speed. 1000 gold.
• : +40% attack speed, +25 attack damage, +10% life steal. Unique Passive: Basic attacks deal 8% of the target's current health as physical damage (60 max vs. minions). Unique Active: Deals 10% of target champion's maximum health (min. 100) as physical damage, heals for the same amount and steals 25% of the target's movement speed for 3 seconds (90 second cooldown) (450 range). 3200 gold.
• : +15% attack speed. 450 gold.
• : Passive: Basic attacks and spell casts grants +4% attack speed and +4 ability power for 8 seconds (stacks up to 8 times). Unique Passive: Falling below 50% health grants you +20% attack speed, +10% life steal, and +10% spell vamp until out of combat (30 second cooldown). +30 attack damage, +40 ability power. 2600 gold.
• : +50% attack speed, +60 ability power. Unique Passive: +20% cooldown reduction. Unique Passive: Basic attacks deal 15 + (15% AP) bonus magic damage on hit. 2920 gold.
• : +50% attack speed, +35% critical strike chance, +5% movement speed. Unique Passive: Champion can move through unit. 2800 gold.
• : +30% attack speed. 900 gold.
• : +70% attack speed. Unique Passive: When basic attacking, bolts are fire at up to 2 ennemies near the target, each dealing 10 + (50% AD) physical damage. These bolts apply on-hit effects. 2400 gold.
• : +40% attack speed, +20% critical strike chance, +6% movement speed. Unique Passive: Grants static charges upon moving or attacking. At 100 charges, basic attacking expends all charges to deal 100 bonus magic damage to up to 4 targets on hit (this damage can critically strike). 2500 gold.
• : +40% attack speed. Unique Passive: +10% cooldown reduction. 1250 gold.
• : +30% attack speed, +30 attack damage, +30 ability power, +10% critical strike chance, +8% movement speed, +250 health, +200 mana. Unique Passive – Rage: Basic attacks grant 20 movement speed for 2 seconds on hit. Minion, monster, and champion kills grant 60 movement speed for 2 seconds. This movement speed bonus is halved for ranged champions. Unique Passive – Spellblade: After using an ability, the next basic attack deals 200% base AD bonus physical damage (1.5 second cooldown). 3703 gold.
• : +50% attack speed, +30 magic resistance. Unique Passive: Your basic attacks deal 42 bonus magic damage. Unique Passive: Your basic attacks steal 5 magic resistance of the target for 5 seconds (stacks up to 5 times). 2600 gold.
• : Unique Active: Grants +40% attack speed and +20% movement speed for 6 seconds (45 second cooldown). +30 attack damage, +15% critical chance, +10% cooldown reduction. Unique Passive: +20 armor penetration. 2700 gold.
• : +20% attack speed, +10% critical strike chance, +5% movement speed. 1100 gold.
• : +50% attack speed, +25 attack damage, +10% movement speed, +10% cooldown reduction. Unique Passive – Tenacity: Reduces the duration of stuns, slows, taunts, fears, silences, blinds and immobilizes by 35%. 2850 gold.

#### Variable Availability

• TC : +50% attack speed, +45 magic resist, +10% cooldown reduction. Unique Active – Quicksilver: Removes all debuffs from your champion. Melee champions also gain +50% movement speed for 1 second (90 second cooldown). 2700 gold.
• T : +30% attack speed. Unique Passive – Maim: Basic attacks against monsters deal 75 bonus magic damage and restore 10 health. Unique Passive – Gain 30% increased gold from monsters. Unique Passive – Trap Detection: Nearby stealthed enemy traps are revealed. Unique Active: A stealth-detecting mist grants vision in the target area for 5 seconds and reveals enemies that enter it for 3 seconds. 60 second cooldown. 1740 gold.
• T : +15% attack speed. Unique Passive – Maim: Basic attacks against monsters deal 50 bonus magic damage and heal 8 health on hit. 750 gold.
• C : +15% attack speed, + 16 attack damage. Unique Passive – Prospector: +150 health. 950 gold.

### 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.

• passively increases his attack speed by 0.6 / 0.7 / 0.8 / 0.9 / 1 / 1.1% for every 2% in the Blood Well.
• increases his attack speed by 40 / 50 / 60% for 12 seconds.
• passively increases his attack speed by 1.25% for every every 1% of his cooldown reduction.
• increases his attack speed by 30 / 38 / 46 / 54 / 62% for 8 seconds.
• passively grants Diana 20% bonus attack speed.
• increases his attack speed by 20 / 25 / 30 / 35 / 40% for 3 seconds.
• increases the attack speed of herself and her Spiderlings by 60 / 80 / 100 / 120 / 140% for 3 seconds
• increases her attack speed by 60 / 75 / 90 / 105 / 120% 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 20 / 25 / 30 / 35 / 40% for 5 seconds.
• increases her attack speed by 60 / 75 / 90 / 105 / 120% for 3 seconds.
• increases his attack speed by (5.5 × Gnar's level) % when in .
• increases his attack speed by 30 / 40 / 50 / 60 / 70% for 4 seconds.
• 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.
• causes his basic attacks to increase his attack speed by 4 / 6 / 8 / 10 / 12 / 14%. This bonus lasts for 2.5 seconds and stacks up to six times.
• increases his attack speed by 300% for three basic attacks.
• causes her basic attacks to increase her attack speed by 10 / 18.3 / 26.6 / 35 / 43.3%. This bonus lasts for 2.5 seconds and stacks up to three times(up to 30 / 55 / 80 / 105 / 130%).
• passively increases his attack speed by 10 / 15 / 20 / 25 / 30%.
• increases the attack speed by 40% of his next two 2 autoattacks within the next three seconds after casting an ability.
• increases his attack speed by 30 / 55 / 80% for 10 seconds. Kills and assists extends the duration by 4 second.
• increases her attack speed by 20 / 30 / 40 / 50 / 60% for 6 seconds.
• increases her or an allied unit's attack speed by 20 / 30 / 40 / 50 / 60% for 7 seconds.
• 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.
• increases an allied unit's and his own attack speed by 25 / 30 / 35 / 40 / 45% for 12 seconds.
• passively increases his attack speed by 1% per 1% health he is missing.
• increases his attack speed by 40 / 50 / 60 / 70 / 80% for 6 seconds.
• increases Quinn's attack speed by 20 / 25 / 30 / 35 / 40% for 3 seconds if she attacks a target that's marked by ; passively grants 's attack speed by 40 / 50 / 60 / 70 / 80%.
• passively grants her 20 / 40 / 60% bonus attack speed.
• increases his attack speed by bonus 47 + (3 × Rengar's level) % for 5 seconds
• passively grants her 40 / 60 / 80% attack speed while is active.
• increase his attack speed by 8 / 10 / 12 / 14 / 16% for 5 seconds that stacks up to 3 times when damaging an enemy champion with the ability.
• increases his attack speed by 40% for 3 seconds after leaving his stealth state.
• increases her attack speed by 30 / 50 / 70 / 90 / 110% for 5 seconds.
• coats the target location with ice for 8 seconds, while on this area, Trundle increases his attack speed by 20 / 35 / 50 / 65 / 80%.
• passively increases his attack speed by 10 / 15 / 20 / 25 / 30%.
• increases his attack speed by 30 / 40 / 50 / 60 / 70% 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 his attack speed by 30 / 40 / 50 / 60 / 70% for 5 seconds on activation.
• 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 30 / 35 / 40 / 45 / 50% for 4 seconds after attacking the same target 3 times.
• 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.
• increases his attack speed by 40 / 50 / 60 / 70 / 80% and half of that amount to nearby allied champions for 10 seconds.
• increases his attack speed by 30 / 35 / 40 / 45 / 50% after hitting a target with this skill.
• increases his attack speed by 40 / 50 / 60 / 70 / 80% for 5 seconds.

### Masteries

• increases your champion's attack speed by 1.25 / 2.5 / 3.75 / 5%.
• grants 5% attack speed to your champion for 3 seconds after landing a critical hit. This bonus stacks up to 3 times.

### Runes

Name Type Tier 1 (Lesser) Tier 2 (Normal) Tier 3 (Greater)
Attack Speed Mark

0.94%

30

1.32%

165

1.7%

410

Seal

0.42%

30

0.59%

165

0.76%

410

Glyph

0.35%

30

0.5%

165

0.64%

410

Quintessence

2.52%

80

3.51%

410

4.5%

1025

## 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

• : Unique Aura: Reduces the attack speed of nearby enemies by 15%.
• : Unique Passive - Cold Steel: If you are hit by a basic attack, you slow the attacker's attack speed by 15%.
• : Unique Passive - Cold Steel: If you are hit by a basic attack, you slow the attacker's attack speed by 10% for 1.5 seconds.

### Summoner Spells

• : Active: Exhausts target enemy champion, reducing their attack and movement speed by 30%, reducing their damage dealt by 40% and armor and magic resist by 10 for 2.5 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.

• slows affected units' attack speed by 20% for 1 second.
• slows affected unit's attack speed by 20 / 25 / 30 / 35 / 40% for 2 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.
• 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

• All percentages listed in a champion's attack speed statistic are approximations.
• Attack speed reduction duration is not affected by crowd control reduction. However if attack speed reduction is in one ability with crowd control like , then the crowd control reduction reduces its duration. So attack speed reduction is reduced by the effect only along with other crowd control. This has been changed with Patch 3.13, as Attack Speed Reductions are now counted as Slows.

and (bonus attack speed only) are so far the only abilities to directly scale with a champion's attack speed statistic. Many other abilities can scale indirectly (for example, through the flat cooldown reduction per attack with ).