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Fire Rate, also known as Bullets per second, is a stat that determines the amount of ammo that will be fired by the weapon per second. Several heroes have abilities that can increase their fire rates to shoot faster, but it can also be decreased, primarily through other enemy's items.

The inverse of this is called gun cycle time, which instead measures seconds per bullet.

Math

The final Fire Rate change is calculated with separate rules for bonuses and slows: positive bonuses (buffs) are additive, while negative modifiers (slows) are multiplicative.

It is important to note that the total change to Fire Rate cannot be reduced below -50%. Any calculated value lower than this will be capped at -50%.

The simplified formula is:

Fire Rate Modifier = (Sum of Bonuses) - (1 - Total Slows)

Where:

Sum of Bonuses = All positive buffs added together (e.g., $0.25 + 0.20$ )
Total Slows = The result of multiplying the remaining values of each slow: $(1 - {Slow}_{1}) \times (1 - {Slow}_{2}) \times \dots$

Examples

Combined Bonuses and Slows

For an example with multiple sources:

+25% Fire Rate from Ricochet
+20% Fire Rate from Swift Striker
-25% Fire Rate Slow from Sinclair's Vexing Bolt
-35% Fire Rate Slow from an enemy's Suppressor

First, calculate the groups separately:

Bonuses: $0.25 + 0.20 = 0.45$
Slows: $(1 - 0.25) \times (1 - 0.35) = 0.75 \times 0.65 = 0.4875$

Then combine them in the final formula:

Final = 0.45 - (1 - 0.4875)

Final = 0.45 - 0.5125 = - 0.0625

This results in a -6.25% final change. The in-game UI typically rounds this value to the nearest whole number, displaying -6%.

Maximum Slow Reduction

For an example with only slows applied:

No positive Fire Rate bonuses (0)
-25% Fire Rate Slow from Sinclair's Vexing Bolt
-35% Fire Rate Slow from an enemy's Suppressor

The calculation is:

0 - (1 - (0.75 \times 0.65))

0 - (1 - 0.4875) = - 0.5125

This results in a calculated slow of -51.25%. Due to the cap, this value is raised to the maximum reduction of -50%.

Base Fire Rate

Values referenced from Hero Comparison Table.

Notes:

Due to a bug, The Doorman's and Paige's weapons have incorrect fire rate values listed in the game UI. The values listed here are accurate.
McGinnis' and Victor's weapons have a wind-up time before reaching maximum fire rate.

Base Fire Rate
Hero	Rounds/s	Spirit Scaling
Abrams	1.59	+0
Apollo	2.63	+0
Bebop	11.9	+0
Billy	11.8	+0
Calico	4.76	+0
Celeste	1.72	+0
The Doorman	1.59	+0
Drifter	2.27	+0
Dynamo	3.81	+0
Graves	9.8	+0
Grey Talon	1.67	+0
Haze	9.52	+0
Holliday	2.12	+0
Infernus	9.52	+0
Ivy	13.6	+0
Kelvin	3.81	+0
Lady Geist	2.12	+0
Lash	5.83	+0
McGinnis	4.76	+0
Mina	3.97	+0
Mirage	2.72	+0
Mo & Krill	5.29	+0
Paige	2	+0
Paradox	7.56	+0
Pocket	1.9	+0
Rem	3.85	+0
Seven	5.83	+0
Shiv	1.81	+0
Shiv (alt fire)	0.794	+0
Silver	1.18	+0
Silver (Transformed)	2	+0
Sinclair	2.72	+0
Venator	7.94	+0
Victor	5.05	+0
Vindicta	4.33	+0
Viscous	4.76	+0
Viscous (alt fire)	0.794	+0
Vyper	14.3	+0
Warden	3.81	+0.01
Wraith	10.6	+0
Yamato	2.38	+0
Yamato (alt fire)	0.952	+0

Sources

Fire Rate

This is a dynamic list "Fire Rate". Edit contents.


Name	Cost	Category	Stat change
Rapid Rounds	800	Weapon	+9% Fire Rate
Active Reload	1,600	Weapon	+25% Fire Rate
Kinetic Dash	1,600	Weapon	+25% Fire Rate
Swift Striker	1,600	Weapon	+20% Fire Rate
Blood Tribute	3,200	Weapon	+35% Fire Rate
Burst Fire	3,200	Weapon	+10% Fire Rate
Burst Fire	3,200	Weapon	+32% Fire Rate
Heroic Aura	3,200	Weapon	+26% Fire Rate
Shadow Weave	3,200	Weapon	+25% Fire Rate
Capacitor	6,400	Weapon	+5% Fire Rate
Frenzy	6,400	Weapon	+15% Fire Rate
Frenzy	6,400	Weapon	+40% Fire Rate
Ricochet	6,400	Weapon	+18% Fire Rate
Spellslinger	6,400	Weapon	+11% Fire Rate
Spiritual Overflow	6,400	Weapon	+30% Fire Rate
Infinite Rounds	Legendary	Weapon	+35% Fire Rate
Battle Vest	1,600	Vitality	+7% Fire Rate
Fury Trance	3,200	Vitality	+32% Fire Rate
Healing Tempo	6,400	Vitality	+35% Fire Rate
Vampiric Burst	6,400	Vitality	+34% Fire Rate
Quicksilver Reload	1,600	Spirit	+10% Fire Rate
Surge of Power	3,200	Spirit	+20% Fire Rate
Focus Lens	6,400	Spirit	+10% Fire Rate
Mercurial Magnum	6,400	Spirit	+22% Fire Rate
Shrink Ray	Legendary	Spirit	+20% Fire Rate

Burst Fire additionally increases Fire Rate by +32%% for 4.5 seconds after hitting an enemy hero.
Heroic Aura's Fire Rate bonus is doubled for nearby player minions within its 35m radius.

Fire Rate Slow

This is a dynamic list "Fire Rate Slow". Edit contents.


Name	Cost	Category	Stat change
Hunter's Aura	3,200	Weapon	+15% Fire Rate Slow
Juggernaut	6,400	Vitality	+40% Fire Rate Slow
Rusted Barrel	800	Spirit	+32% Fire Rate Slow
Suppressor	1,600	Spirit	+28% Fire Rate Slow

Map spawns

Golden Statues can provide a permanent increase: +1.5% Fire Rate before 10 minutes, +2% Fire Rate before 30 minutes, or +2.5% Fire Rate after 30 minutes.
Powerup runes can provide a temporary Gun buff that provides +12% to +35% Fire Rate for 160 seconds (scaling with game time from 5 to 40 minutes).