Attack speed is a stat that determines how fast a unit can perform basic attacks, measured in attacks per second. Here's everything you need to know about attack speed in League of Legends:

Core Mechanics:

• Base attack speed varies by champion but is fixed at level 1
• Bonus attack speed stacks additively and is a percentage of the attack speed ratio
• Capped at 2.5 attacks per second (except for specific exceptions)
• Cannot be reduced below 0.2 attacks per second
• Has a gold value of 25 per percent point

Calculation Formula: Total Attack Speed = Base Attack Speed + (Attack Speed Ratio × Bonus Attack Speed%)

Sources of Attack Speed:

• Champion levels (growth per level varies by champion)
• Items (like Berserker's Greaves, Nashor's Tooth)
• Champion abilities
• Runes (Lethal Tempo, Hail of Blades)
• Team buffs (from allies like Lulu, Nidalee)

Notable Exceptions:

• Jhin cannot increase attack speed through normal means
• Graves has a special attack speed calculation
• Bel'Veth can exceed the attack speed cap by default
• Some champions start with modified base attack speeds

Attack Speed Cap Modifiers:

• Jinx's Get Excited!
• Varus' Living Vengeance (2.7632 cap)
• Zeri's Burst Fire (1.5 cap)

Attack speed also scales various champion abilities and effects, even when exceeding the attack speed cap, making it valuable beyond just basic attack frequency.

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