Attack Speed Calculator

How to Use This Tool

Enter your character's base attack speed (in attacks per second) from the game. Add any attack speed bonuses from items, buffs, or talents as a percentage. Include any attack speed reductions (slows, debuffs) as a percentage. If the game has a hard cap or floor for attack speed, enter those values. Select the game or formula preset that matches your game's calculation method. Click Calculate to see the effective attack speed, attacks per minute, and time per attack. Use Reset to clear all fields and start over.

Formula and Logic

We provide two core formulas:

• Additive: Final APS = Base APS × (1 + (Bonus% − Reduction%)/100). Some games apply attack speed modifiers additively.
• Multiplicative: Final APS = Base APS × (1 + Bonus%/100) × (1 − Reduction%/100). This is used in games like League of Legends and World of Warcraft where bonuses and slows multiply.

For League of Legends, note the typical attack speed cap of 2.5 (or 3.5 with specific items). World of Warcraft has no hard cap but may have diminishing returns at extreme values (not modeled). The calculator also respects optional maximum (cap) and minimum (floor) constraints you provide.

Practical Notes

• Attack speed bonuses come from items, buffs, talents, and runes. Reductions come from enemy abilities, items, or debuffs.
• Many games have attack speed breakpoints—specific APS values that grant an extra attack over a fight duration. Use this calculator to hit those breakpoints.
• Patch updates frequently change attack speed scaling, item bonuses, and caps. Always consult the latest patch notes for your game.
• Attack speed interacts with other mechanics like animation time, cooldown reduction, and resource generation. This tool focuses purely on the attack speed stat.
• For games with point-based attack speed (e.g., Dota 2), you must convert your bonus to an effective percentage relative to your hero's base attack speed. A dedicated Dota 2 calculator is recommended for precision.

Why This Tool Is Useful

• Build Optimization: Compare different items or buffs to see which yields the highest effective attack speed.
• Breakpoint Planning: Determine if your build reaches critical attack speed breakpoints for maximum DPS.
• Trade-off Analysis: Quantify the cost of slow debuffs or the benefit of attack speed buffs.
• Game Design: Quickly test attack speed values and caps for balance in your own games.
• Content Creation: Demonstrate attack speed mechanics clearly in streams or videos.

Frequently Asked Questions

Does attack speed affect damage per second?

Yes, higher attack speed increases damage per second (DPS) if your attacks deal fixed damage. However, some games have on-hit effects, critical strikes, or resource costs that scale with attack speed, so DPS may not increase linearly. This calculator computes attack speed only; for total DPS, factor in your average damage per hit and other modifiers.

How do game caps and floors work?

Most games impose upper and lower bounds on attack speed to prevent extreme values. For example, League of Legends caps attack speed at 2.5 attacks per second (increased to 3.5 with certain items). If your calculated attack speed exceeds the cap, it is reduced to the cap. A floor (e.g., 0.2 APS) prevents attack speed from dropping too low. Enter these values in the calculator to simulate such limits.

What about attack speed scaling with other stats?

In many games, attack speed scales with attributes like agility, dexterity, or haste rating. This calculator assumes you have already converted all such scaling into an effective percentage bonus. For instance, if your gear and stats grant +25% attack speed, include that in the bonus field.

Additional Guidance

• For games with complex attack speed formulas (e.g., Dota 2, Path of Exile), use a specialized calculator that accounts for those specific mechanics.
• Remember that attack speed is just one component of overall performance. Consider critical hit chance, damage multipliers, resource costs, and skill cooldowns when evaluating builds.
• When theorycrafting, test your attack speed in actual gameplay. Network latency, animation locking, and game engine quirks can affect the realizable attack speed compared to the theoretical value.