Attack speed

Attack Speed ( $AS$ ) is the frequency with which units attack is measured. A unit's attack speed can be modified by items, per point of agility, abilities providing flat bonuses and auras.

Mechanics

IAS vs BAT: attacks per second

Most heroes have a base attack speed and base attack time of 100 and 1.7 respectively.

Total attack speed is defined as

$\sum {AS}=(AS_{base}+\Sigma {Agi})+\Sigma {AS}(a_{i}-r_{i}),\quad \&\quad 20\leq \Sigma {AS}\leq 700$

With ASbase being the base attack speed, ai and ri being the flat additive and flat reduction bonuses.

Attack speed bonuses and reductions stack additively by a flat value. Unlike movement speed, there is currently no sources that reduces attack speed by a percentage. The total attack speed value has a minimum of 20 and an maximum value of 700 and a unit's attack speed cannot be reduced or increased beyond the the values above.

The attack rate is the amount of attacks a unit can launch within a second, and is defined as

$r=\displaystyle {\frac {\sum {AS}}{AS_{B}\times BAT}}$

With Ar being the amount of attacks per second (Attack Rate), ASB being the hero's base attack speed and BAT being the base attack time.

Therefore, the time needed per attack a hero launches is defined as

$t=\displaystyle {\frac {1}{r}}$

Base Attack Time

Every unit has a base attack time (BAT), which refers to the default interval between attacks for a unit without considering agility and attack speed bonus.

For example, a Melee Creep has a BAT of 1, and thus attacks once per second by default. Similarly, if a hero with 1.7 BAT with no agility and no bonus attack speed, they would attack once every 1.7 seconds. While nearly every unit can have their attack speed modified, only a few heroes can actively change their BAT.

Examples

With a base attack time of 1.7, 100 base attack speed and 20 agility at level 1. What is Marci's current attack rate?

$r=\displaystyle {\frac {(100+20)}{100\times 1.7}}=0.706$

$t=\displaystyle {\frac {1}{r}}=1.416$

Marci attacks about 0.706 times per second in this example, and takes 1.416 seconds between attacks.

Benchmark

Most heroes' attack rate is 0.588 attacks per second. Attack speed is expressed in percent of base attack speed. The base is therefore expressed as 100. Each point of increased attack speed (IAS) sources add 1 point to it, and attack speed works together with base attack time to determine how often a unit can attack.

When hovering over the hero's attributes in the HUD, the first field shows the attack speed and the time required per attack in parenthesis. The attack speed field is defaulted to 100 and adds the attack speed bonuses or reductions afterwards, leading to a minimum of 20 and a maximum value of 700.

Even though the HUD may show a unit to exceed these boundaries, the actual attack speed used for calculations will still obey the minimum and maximum values.

For units that do not have 1.7 BAT, the attack speed values in the HUD will be displayed as if they have 1.7 BAT. For example, a unit with 0.85 BAT and no other attack speed bonus sources will display itself as having an attack speed of 1.445, because 0.85 seconds is how long a unit with 1.7 BAT and 1.445 attack speed would take in between attacks.

This strange quirk makes it harder to figure out if a hero without the standard 1.7 BAT is nearing maximum attack speed, but it does allow players to compare this uniform metric across all heroes easier.

The following table shows the attack speed benchmarks and their effect on attacks per second:

AS Vs BAT Benchmarks
Default AS (100)	BAT	Normal Speed
20	5x	${\tfrac {1}{5}}$x
25	4x	${\tfrac {1}{4}}$x
33	3x	${\tfrac {1}{3}}$x
50	2x	${\tfrac {1}{2}}$x
100	1x	1x
200	${\tfrac {1}{2}}$x	2x
300	${\tfrac {1}{3}}$x	3x
400	${\tfrac {1}{4}}$x	4x
500	${\tfrac {1}{5}}$x	5x
600	${\tfrac {1}{6}}$x	6x
700	${\tfrac {1}{7}}$x	7x

Exceptions

Most heroes have a BAT of 1.7 except for the following:

Hero		Base Attack Time	Base Attack Speed	Difference in Attacks/Sec	Attack Speed Range (in 1.7 BAT Representation)
					Min	Max
	Juggernaut	1.4	110	+21.4%	36.4	850
	Anti-Mage	1.4	100	+21.4%	24.3	850
	Dark Willow	1.5	115	+13.3%	39.7	793.3
	Morphling	1.5	100	+13.3%	22.7	793.3
	Queen of Pain	1.5	100	+13.3%	22.7	793.3
	Terrorblade	1.5	100	+13.3%	22.7	793.3
	Windranger	1.5	100	+13.3%	22.7	793.3
	Huskar	1.6	100	+6.3%	21.3	743.8
	Lina	1.6	100	+6.3%	21.3	743.8
	Lone Druid	1.6	100	+6.3%	21.3	743.8
	Shadow Fiend	1.6	100	+6.3%	21.3	743.8
	Snapfire	1.6	100	+6.3%	21.3	743.8
	Bristleback	1.8	100	-5.6%	18.9	661.1
	Magnus	1.8	100	-5.6%	18.9	661.1
	Mars	1.8	100	-5.6%	18.9	661.1
	Weaver	1.8	120	-5.6%	37.8	661.1
	Sven	1.9	100	-10.5%	17.9	626.3
	Outworld Destroyer	1.9	100	-10.5%	17.9	626.3
	Treant Protector	1.9	100	-10.5%	17.9	626.3
	Spirit Breaker	1.9	100	-10.5%	17.9	626.3
	Doom	1.9	100	-10.5%	17.9	626.3
	Hoodwink	2	100	-15%	17	595

Other Units

Summons

Unit		Base Attack Time	Base Attack Speed	Difference in Attacks/Sec	Attack Speed Range (in 1.7 BAT Representation)
					Min	Max
	Fountain	0.15	100	+1033.3%	226.7	7933.3
	Death Ward	0.22	100	+672.7%	154.5	5409.1
	Familiar	0.5	100	+240%	68	2380
	Necronomicon Warrior	0.75	105	+126.7%	56.7	1586.7
	Void (Level 3)	0.8	100	+112.5%	42.5	1487.5
	Lycan Wolf (Level 4)	0.9	100	+88.9%	37.8	1322.2
	Melee Creep	1	100	+70%	34	1190
	Necronomicon Archer	1	105	+70%	42.5	1190
	Lycan Wolf (Level 3)	1	100	+70%	34	1190
	Void (Level 2)	1	100	+70%	34	1190
	Lycan Wolf (Level 2)	1.1	100	+54.5%	30.9	1081.8
	Warlock Golem	1.2	100	+41.7%	28.3	991.7
	Lycan Wolf (Level 1)	1.2	100	+41.7%	28.3	991.7
	Void (Level 1)	1.2	100	+41.7%	28.3	991.7
	Wraith King Skeleton	1.2	100	+41.7%	28.3	991.7
	Boar	1.25	100	+36%	27.2	952
	Earth	1.25	100	+36%	27.2	952
	Fire	1.35	100	+25.9%	25.2	881.5
	Spiderite	1.35	100	+25.9%	25.2	881.5
	Spiderling	1.35	100	+25.9%	25.2	881.5
	Forged Spirit	1.35	100	+25.9%	25.2	881.5
	Greater Treant	1.4	100	+21.4%	24.3	850
	Plague Ward	1.4	100	+21.4%	24.3	850
	Spirit Bear (Level 4)	1.45	100	+17.2%	23.4	820.7
	Serpent Ward	1.5	100	+13.3%	22.7	793.3
	Eidolon	1.5	100	+13.3%	22.7	793.3
	Storm	1.5	100	+13.3%	22.7	793.3
	Spirit Bear (Level 3)	1.55	100	+9.7%	21.9	767.7
	Treant	1.6	100	+6.3%	21.3	743.8
	Undying Zombie	1.6	100	+6.3%	21.3	743.8
	Spirit Bear (Level 2)	1.65	100	+3%	20.6	721.2
	Spirit Bear (Level 1)	1.75	100	-2.9%	19.4	680
	Roshan	2	200	-15%	102	595
	Siege Creep	3	100	-43.3%	11.3	396.7

Neutral Creeps

Unit		Base Attack Time	Base Attack Speed	Difference in Attacks/Sec	Attack Speed Range (in 1.7 BAT Representation)
					Min	Max
	Ghost	1.2	100	+41.7%	28.3	991.7
	Centaur Courser	1.3	100	+30.8%	26.2	915.4
	Ancient Granite Golem	1.35	100	+25.9%	25.2	881.5
	Ancient Rock Golem	1.35	100	+25.9%	25.2	881.5
	Alpha Wolf	1.35	100	+25.9%	25.2	881.5
	Dark Troll Summoner	1.35	100	+25.9%	25.2	881.5
	Hill Troll	1.35	100	+25.9%	25.2	881.5
	Kobold	1.35	100	+25.9%	25.2	881.5
	Kobold Foreman	1.35	100	+25.9%	25.2	881.5
	Kobold Soldier	1.35	100	+25.9%	25.2	881.5
	Mud Golem	1.35	100	+25.9%	25.2	881.5
	Ogre Bruiser	1.35	100	+25.9%	25.2	881.5
	Ogre Frostmage	1.35	100	+25.9%	25.2	881.5
	Satyr Mindstealer	1.35	100	+25.9%	25.2	881.5
	Satyr Tormenter	1.35	100	+25.9%	25.2	881.5
	Shard Golem	1.35	100	+25.9%	25.2	881.5
	Wildwing	1.35	100	+25.9%	25.2	881.5
	Wildwing Ripper	1.35	100	+25.9%	25.2	881.5
	Ancient Black Dragon	1.5	100	+13.3%	22.7	793.3
	Centaur Conqueror	1.5	100	+13.3%	22.7	793.3
	Fell Spirit	1.5	100	+13.3%	22.7	793.3
	Hellbear	1.5	100	+13.3%	22.7	793.3
	Giant Wolf	1.45	100	+17.2%	23.4	820.7
	Hellbear Smasher	1.55	100	+9.7%	21.9	767.7
	Harpy Scout	1.6	100	+6.3%	21.3	743.8
	Harpy Stormcrafter	1.6	100	+6.3%	21.3	743.8
	Hill Troll Berserker	1.6	100	+6.3%	21.3	743.8
	Vhoul Assassin	1.6	100	+6.3%	21.3	743.8
	Ancient Black Drake	1.8	100	-5.6%	18.9	661.1
	Ancient Rumblehide	1.8	100	-5.6%	18.9	661.1
	Ancient Thunderhide	1.8	100	-5.6%	18.9	661.1
	Hill Troll Priest	1.8	100	-5.6%	18.9	661.1

Base Attack Speed Manipulation

Most base attack speed manipulation abilities sets the caster's base attack time to a certain value, unless stated otherwise by the ability descriptions.

Base Attack Speed Manipulation Sources

• Alchemist - Chemical Rage
  
  Base Attack Time: 1.2/1.1/1
  Duration: 25
  
• Snapfire - Lil' Shredder
  
  Base Attack Time: 1
  Duration: 6
  
• Lone Druid - Talent by Level 25 Right
  
  -0.1 Spirit Bear Attack Time:
  Reduces Spirit Bear's base attack time when talent is learned.
• Troll Warlord - Berserker's Rage
  
  Base Attack Time: 1.45
  Sets Troll Warlord's base attack time to the given values while ability is active.

Base Attack Speed

Heroes	Attack speed
Centaur Warrunner, Shadow Shaman, Spectre, Techies, Tiny	90
Alchemist, Ancient Apparition, Anti-Mage, Arc Warden, Axe, Bane, Batrider, Beastmaster, Bloodseeker, Bounty Hunter, Brewmaster, Bristleback, Chaos Knight, Chen, Clinkz, Clockwerk, Crystal Maiden, Dark Seer, Dawnbreaker, Dazzle, Death Prophet, Disruptor, Doom, Dragon Knight, Drow Ranger, Earth Spirit, Earthshaker, Elder Titan, Ember Spirit, Enchantress, Enigma, Faceless Void, Grimstroke, Hoodwink, Huskar, Invoker, Io, Jakiro, Keeper of the Light, Kunkka, Legion Commander, Leshrac, Lich, Lina, Lone Druid, Luna, Lycan, Magnus, Marci, Mars, Medusa, Meepo, Monkey King, Morphling, Naga Siren, Nature's Prophet, Necrophos, Night Stalker, Nyx Assassin, Ogre Magi, Omniknight, Oracle, Outworld Destroyer, Pangolier, Phantom Assassin, Phantom Lancer, Phoenix, Puck, Pudge, Pugna, Queen of Pain, Razor, Riki, Rubick, Shadow Demon, Shadow Fiend, Skywrath Mage, Slardar, Snapfire, Sniper, Spirit Breaker, Sven, Templar Assassin, Terrorblade, Tidehunter, Timbersaw, Tinker, Treant Protector, Troll Warlord, Tusk, Underlord, Undying, Ursa, Vengeful Spirit, Void Spirit, Warlock, Windranger, Winter Wyvern, Witch Doctor, Wraith King, Zeus	100
Juggernaut, Sand King, Slark, Storm Spirit, Visage	110
Dark Willow, Lion, Mirana, Silencer, Venomancer	115
Abaddon, Lifestealer, Viper, Weaver	120
Broodmother, Gyrocopter	125

Attack Speed Limits

By default, the lower limit for attack speed is at 20, while the upper limit lies at 700. These values are the same for all units and cannot be exceeded by flat or percentage attack speed bonuses or reductions.

Maximum Attack Speed

The following abilities are able to change a unit's maximum attack speed (of 700), allowing it to reach even higher values. If a unit is affected by multiple abilities that change the maximum value, the higher value takes priority.

Maximum Attack Speed Changing Abilities

• Marci - Unleash
  
  Flurry Attack Speed Bonus: 700/975/1325
  Duration: 16
  While active, the ability removes the attack speed limit for the hero.

Fixed Attack Interval

The following abilities perform instant attacks based on fixed intervals and they completely ignore the base attack time, attack speed and attack rate of the unit.

Abilities with Fixed Attack Intervals

• Gyrocopter - Flak Cannon
  

  
  Side Gunner Range: 700
  Side Gunner Interval: 1.2
  Prioritizes furthest unit away within its range.
• Io - Tether
  

  
  The attacks are performed as soon as the ally launches their attack (including instant attacks from the ally). It does not matter whether the attack actually hits or not.
• Juggernaut - Blade Fury
  

  
  Instant Attack Interval: 1
  Duration: 5
  The instant attack targets are chosen randomly, there are no priorities.
• Lifestealer - Infest
  

  
  Enemy Hero Attack Interval: 1.25
  Enemy Hero Duration: 5
  Ability can be now cast on enemy heroes or creep-heroes.
• Mars - Bulwark
  

  
  Soldiers Attack Range: 250
  Soldiers Attack Interval: 1
  Creates invulnerable soldiers around Mars' front while ability is active.
• Monkey King - Wukong's Command
  
  Soldiers Attack Interval: 1.2
  
• Puck - Dream Coil
  

  
  Instant Attack Radius: 775
  Instant Attack Interval: 0.75
  Perform instant attacks on all leashed enemies, as long as Puck stays within the instant attack radius of the targeted area.
• Riki - Tricks of the Trade
  
  Radius: 450
  Attack Count: 4 ( 5)
  Instant Attack Interval: 0.67 ( 0.5)
  Max Channel Time: 2
  
• Tiny - Tree Volley
  
  Tree Throw Interval: 0.4
  Max Channel Time: 2.4
  
• Weaver - Geminate Attack
  
  Instant Attack Interval: 0.25
  Number of Extra Attacks: 1 ( 2)
  

Modifying Attack Speed

These abilities increase or decrease a unit's movement speed by a constant value. These bonuses and reductions can not exceed the minimum and maximum movement speed limits.

Bonuses

Flat Bonus Attack Speed from Abilities

• Abaddon - Curse of Avernus
  
  Attack Speed Bonus: 40/60/80/100
  Duration: 4
  Affects every unit attacking a debuffed unit.
• Alchemist - Berserk Potion
  
  Attack Speed Bonus: 50
  Buff Duration: 10
  
• Ancient Rumblehide - War Drums Aura
  
  Attack Speed Bonus: 25
  Aura, affecting allies within radius.
• Ancient Thunderhide - Frenzy
  
  Attack Speed Bonus: 75
  Duration: 8
  Affects targeted ally.
• Arc Warden - Magnetic Field
  
  Attack Speed Bonus: 50/60/70/80 ( 90/100/110/120)
  Duration: 3.5/4.5/5.5/6.5
  Affects all allied heroes and buildings within the radius.
• Axe - Culling Blade
  
  Kill Attack Speed Bonus: 30
  Duration: 6
  Affects allies within radius upon successfully culling an enemy.
• Beastmaster - Inner Beast
  
  Attack Speed Bonus: 15/25/35/45 ( 45/55/65/75)
  Radius: 1200
  Aura, affecting allies within range.
• Bloodseeker - Bloodrage
  
  Self Attack Speed Bonus: 60/90/120/150 ( 90/120/150/180)
  Ally Attack Speed Bonus: 30/45/60/75 ( 45/60/75/90)
  Duration: 8
  Grants attack speed bonus at the cost of a percentage of health per second.
• Chen - Penitence
  
  Attack Speed Bonus: 30/60/90/120
  Duration: 5/6/7/8
  Affects every unit attacking a debuffed unit.
• Drum of Endurance - Endurance
  
  Attack Speed Bonus: 45
  Duration: 6
  Affects allies within radius upon cast.
• Disruptor - Thunder Strike
  

  
  Attack Speed Bonus: 75
  Ally Buff Duration: 1.25
  Thunder Strike Duration: 6
  When cast on ally, Thunder Strike follows the ally, deals damage around them and each strike gives a short duration of attack speed bonus.
• Echo Sabre - Echo Strike
  
  Attack Speed Bonus: 490
  Number of Attacks: 1
  Causes melee attacks to attack twice in quick succession.
• Faceless Void - Chronosphere
  

  
  Radius: 500 ( 640)
  Attack Speed Bonus: 120
  Duration: 4/4.5/5
  The attack speed increasing talent immediately upgrades all currently active Chronospheres.
• Hellbear Smasher - Swiftness Aura
  
  Attack Speed Bonus: 15
  Aura, affecting allies within range.
• Hurricane Pike - Hurricane Thrust
  
  Self Attack Speed Bonus: 100
  Duration: 6
  Only grants attack speed bonus when cast on the targeted enemy. Bonus is lost after 5 attacks or within duration, whichever is shorter.
• Huskar - Berserker's Blood
  
  Self Max Attack Speed Bonus: 160/210/260/310
  Grants attack speed bonus per point of health missing, reaching the cap at 10% maximum health.
• Invoker - Alacrity
  
  Attack Speed Bonus: 10/22/34/46/58/70/82 ( /94) ( 45/57/69/81/93/105/117 /129)
  Duration: 9
  Affects targeted ally.
• Invoker - Wex
  
  Self Attack Speed Bonus per Wex Instance: 1/2/3/4/5/6/7
  Max instances: 3
  
• Io - Overcharge
  
  Attack Speed Bonus: 50/70/90/110
  Duration: 8
  Affects self and the Tethered ally.
• Juggernaut - Omnislash
  
  Attack Speed Bonus: 40
  Affects self upon cast.
• Juggernaut - Swiftslash
  
  Same values and notes applies from Omnislash.
• Legion Commander - Press the Attack
  
  Attack Speed Bonus: 65/90/115/140
  Duration: 5
  Affects targeted ally.
• Legion Commander - Duel
  
  If Legion Commander is victorious, Press the Attack based on its current level is applied on her.
• Lifestealer - Ghoul Frenzy
  
  Attack Speed Bonus: 20/30/40/50
  Passive.
• Lina - Fiery Soul
  
  Self Attack Speed Bonus per Stack: 30/50/70/90 ( 60/80/100/120)
  Max Stacks: 3
  Duration: 12
  Gains a stack on each ability cast.
• Lone Druid - Spirit Link
  
  Attack Speed Bonus: 16/34/52/70
  Affects self and the Spirit Bear.
• Lone Druid - Savage Roar
  

  
  Ally Radius: 700
  Ally Attack Speed Bonus: 60
  Ally Duration: 5
  Shares cooldown with the Spirit Bear's Savage Roar.
• Spirit Bear - Savage Roar
  

  
  Same values and notes applies from Lone Druid's Savage Roar.
• Mirana - Leap
  
  Self Attack Speed Bonus: 25/50/75/100 ( 105/130/155/180)
  Duration: 2.5
  
• Moon Shard - Consume
  
  Attack Speed Bonus: 60
  A hero cannot consume more than one Moon Shard.
• Night Stalker - Hunter in the Night
  
  Self Attack Speed Bonus: 20/40/60/80 ( 100/120/140/160)
  Grants bonuses only during the night.
• Ogre Magi - Bloodlust
  
  Ally Attack Speed Bonus: 30/40/50/60 ( 55/65/75/85)
  Self Attack Speed Bonus: 30/50/70/90 ( 55/75/95/115)
  Duration: 30
  Can be cast on buildings.
• Phantom Assassin - Phantom Strike
  
  Self Attack Speed Bonus: 75/100/125/150
  Duration: 2
  
• Slark - Shadow Dance
  

  
  Active Attack Speed Bonus: 50
  Active Duration: 4/4.25/4.5 ( 5/5.25/5.5
  Grants attack speed bonus while ability is active.
• Slark - Depth Shroud
  

  
  Radius: 300
  Duration: 3
  Aura Linger Duration: 0.5
  Same values and notes applies from Shadow Dance. Affect allies within radius.
• Solar Crest - Shine
  
  Attack Speed Bonus: 50
  Duration: 12
  Affects targeted ally only.
• Terrorblade - Demon Zeal
  
  Attack Speed Bonus: 50
  Melee Bonus: 100%
  Duration: 7
  Grants 100 attack speed bonus while in melee form.
• Troll Warlord - Fervor
  
  Self Attack Speed Bonus per Stack: 15/20/25/30 ( 20/25/30/35)
  Max Stacks: 12
  Gains a stack on each attack on the same target. All stacks are lost upon changing target.
• Troll Warlord - Rampage
  
  Radius: Global
  Attack Speed Bonus: 70
  Grants all allied heroes attack speed or status resistance bonus based on their range type.
• Troll Warlord - Battle Trance
  
  Self Attack Speed Bonus: 140/170/200
  Duration: 6.5 ( 8.5)
  
• Ursa - Overpower
  
  Self Attack Speed Bonus: 400
  Duration: 20
  Bonus is lost after 3/4/5/6 ( 6/7/8/9) attacks or within 20 seconds, whichever is shorter.
• Undying Zombie - Deathlust
  
  Enemy Health Threshold: 40%
  Threshold Attack Speed Bonus: 50/60/70/80
  Bonus is granted when the attacked unit's health goes below the threshold.
• Visage - Grave Chill
  
  Attack Speed Change: 34/46/58/70
  Duration: 6
  Affects self and Familiars.
• Warlock - Upheaval
  

  
  Radius: 500/550/600/650
  Ally Attack Speed Bonus Increase per Second: 10
  Ally Max Attack Speed Bonus: 70
  Buff Duration: 3
  Max Channel Time: 10/12/14/16
  The strength of the buff is based on the ability channel duration, not on how long a unit stands in the affected area.
• Windranger - Focus Fire
  
  Self Attack Speed Bonus: 475
  Duration: 20
  Only grants attack speed against the targeted enemy. The buff is not lost upon switching target, so it continues to give attack speed upon switching back to it.
• Winter Wyvern - Winter's Curse
  
  Enemy Attack Speed Bonus: 65
  Duration: 4.5/5/5.5 ( 6/6.5/7)
  Affects all enemy units within radius around the enemy target.
• Wraith King - Wraith Delay
  

  
  Wraith Delay Radius: 1200
  Attack Speed Bonus: 75
  Wraith Delay Duration: 7
  Aura Linger Duration: 0.5
  Allies killed within radius will be transformed into a wraith, granting them bonuses and have their death delayed.

Items

These items passively grant the wielder a flat attack speed bonus.

Flat Bonus Attack Speed from Items

Item	Value	Item Cost	Cost/Value Point
Aghanim's Scepter	10	4200	420
Armlet of Mordiggian	25	2500	100
Assault Cuirass	60	5125	85.42
Band of Elvenskin	6	450	75
Blade of Alacrity	10	1000	100
Blitz Knuckles	35	1000	28.57
Bloodthorn	90	6275	69.72
Book of Shadows	12	N/A	N/A
Bracer	2	505	252.5
Brigand's Blade	10	N/A	N/A
Butterfly	60	4975	82.92
Circlet	2	155	77.5
Crown	4	450	112.5
Dagon 1	6	2700	450
Dagon 2	8	3950	493.75
Dagon 3	10	5200	520
Dagon 4	12	6450	537.5
Dagon 5	14	7700	550
Diffusal Blade	24	3150	131.25
Dragon Lance	16	1900	118.75
Eaglesong	25	2800	112
Echo Sabre	10	2500	250
Elven Tunic	26	N/A	N/A
Ethereal Blade	40	4300	107.5
Eye of Skadi	25	5300	212
Ghost Scepter	5	1500	300
Gleipnir	14	6150	439.29
Gloves of Haste	20	450	22.5
Grove Bow	15	N/A	N/A
Hand of Midas	40	2200	55
Helm of the Dominator	6	2400	400
Helm of the Overlord	7	6325	903.57
Holy Locket	3	2400	800
Hurricane Pike	20	4450	222.5
Hyperstone	60	2000	33.33
Iron Branch	1	50	50
Linken's Sphere	16	4600	287.5
Mage Slayer	20	2400	120
Magic Wand	3	450	150
Manta Style	38	4600	121.05
Mask of Madness	120	1775	14.79
Meteor Hammer	8	2350	293.75
Mind Breaker	25	N/A	N/A
Mirror Shield	10	N/A	N/A
Mjollnir	70	5600	80
Monkey King Bar	45	4975	110.56
Moon Shard	140	4000	28.57
Ninja Gear	24	N/A	N/A
Null Talisman	2	505	252.5
Oblivion Staff	10	1500	150
Ocean Heart	5	N/A	N/A
Orchid Malevolence	25	3475	139
Pig Pole	6	N/A	N/A
Pirate Hat	150	N/A	N/A
Power Treads (Agility)	35	1400	40
Power Treads (Intelligence)	25	1400	56
Power Treads (Strength)	25	1400	56
Quarterstaff	10	875	87.5
Quicksilver Amulet	10	N/A	N/A
Ring of Aquila	9	N/A	N/A
Rod of Atos	12	2750	229.17
Sange and Yasha	28	4100	146.43
Scythe of Vyse	10	5675	567.5
Shadow Blade	35	3000	85.71
Silver Edge	35	5450	155.71
Slippers of Agility	3	140	46.67
Solar Crest	5	2625	525
Spell Prism	6	N/A	N/A
Spirit Vessel	2	2840	1420
Swift Blink	25	6800	272
The Leveller	50	N/A	N/A
Ultimate Orb	10	2050	205
Urn of Shadows	2	840	420
Vambrace (Agility)	20	N/A	N/A
Vambrace (Intelligence)	5	N/A	N/A
Vambrace (Strength)	5	N/A	N/A
Veil of Discord	4	1525	381.25
Witch Blade	35	2600	74.29
Wraith Band	10	505	50.5
Yasha	28	2050	73.21
Yasha and Kaya	28	4100	146.43
Values may include portions from actives or auras.

Talents

The following heroes have a talent that grants them attack speed.

Bonus	Level 10		Level 15		Level 20		Level 25
	Left	Right	Left	Right	Left	Right	Left	Right
Attack Speed	+15 +15 +15 +20 +20 +20 +20 +25	+15 +20 +20 +30	+20 +20 +25 +30 +30 +30 +60	+25 +30 +30	+80	+200		+110 +80

Reductions

Flat Reductions From Abilities

• Ancient Apparition - Ice Vortex
  

  
  Effect Radius: 275
  Attack Speed Slow: 20
  Aura, affecting enemies within radius.
• Ancient Thunderhide - Slam
  
  Effect Radius: 350
  Attack Speed Slow: 60
  Duration: 2 / 4
  
• Boar - Poison
  
  Attack Speed Slow: 10/20/30/40
  Duration: 3
  Successive attacks do not stack the slow, they refresh the duration.
• Beastmaster - Primal Roar
  
  Enemy Attack Speed Slow: 60
  Duration: 3/3.5/4
  Affects secondary targets only.
• Brewmaster - Thunder Clap
  
  Radius: 400 ( 600)
  Attack Speed Slow: 25/35/45/55
  Duration: 4
  
• Crystal Maiden - Crystal Nova
  
  Radius: 425 ( 550)
  Attack Speed Slow: 20/30/40/50
  Duration: 4.5
  
• Crystal Maiden - Freezing Field
  
  Radius: 810
  Attack Speed Slow: 60
  Duration: 1
  
• Dragon Knight - Elder Dragon Form
  
  Frost Breath Radius: 300
  Frost Breath Attack Speed Slow: 0/0/40 ( /60)
  Frost Breath Debuff Duration: 3
  Dragon Form Duration: 60
  Frost Breath is available at level 3 Elder Dragon Form and above (Blue Dragon and Black Dragon).
• Enchantress - Untouchable
  
  Attack Speed Slow: 120/160/200 ( 185/225/265)
  Passive ability.
• Eye of Skadi - Cold Attack
  
  Attack Speed Slow: 25 / 50
  Duration: 3
  Slows every unit attacked by the wielding unit. Melee targets slow for more.
• Ghost - Frost Attack
  
  Attack Speed Slow: 25
  Duration: 1.5
  Passive ability.
• Hellbear Smasher - Thunder Clap
  
  Radius: 300
  Attack Speed Slow: 25%
  Duration: 25
  
• Jakiro - Dual Breath
  
  Starting Radius: 225
  Travel Distance: 750 ( 1500)
  End Radius: 275
  Attack Speed Slow: 28/32/36/40
  Duration: 5
  
• Jakiro - Liquid Fire
  
  Radius: 300
  Attack Speed Slow: 30/40/50/60 ( 80/90/100/110)
  Duration: 5
  
• Lich - Frost Blast
  
  Radius: 200 ( 325)
  Attack Speed Slow: 30
  Duration: 4
  
• Lich - Chain Frost
  
  Attack Speed Slow: 65
  Duration: 2.5
  
• Lycan Wolf - Cripple
  
  Proc Chance: 20%
  Attack Speed Slow: 60
  Duration: 4
  
• Lycan Lane Wolf - Cripple
  

  
  Same values and notes applies from Cripple.
• Magnus - Skewer
  
  Attack Speed Slow: 25/30/35/40
  Duration: 3.25
  Slows the enemy after the ability ends.
• Magnus - Horn Toss
  
  Attack Speed Slow: 100
  Landing Slow Duration: 1.25
  Slows the attack speed of all affected enemies when landed on ground.
• Marci - Unleash
  
  Pulse Attack Speed Slow: 60/80/100
  Pulse Debuff Duration: 2
  The last strike in every Fury combo creates a pulse around the target that slows attack speed.
• Medusa - Stone Gaze
  
  Radius: 1200
  Attack Speed Slow: 35
  Every enemy unit that faces Medusa within 85° in front of them within radius around Medusa gets the slow debuff applied.
• Night Stalker - Void
  
  Attack Speed Slow: 50
  Slows the enemy or within radius for different durations during daytime and nighttime.
• Phoenix - Fire Spirits
  
  Effect Radius: 200
  Attack Speed Slow: 80/100/120/140
  Debuff Duration: 4
  
• Roshan - Slam
  
  Radius: 350
  Attack Speed Slow: 50
  Duration: 2 / 4
  
• Sand King - Epicenter
  
  Attack Speed Slow: 30
  Duration: 3
  
• Shiva's Guard - Freezing Aura
  

  
  Radius: 1200
  Attack Speed Slow: 45
  Aura Linger Duration: 0.5
  Passive aura, affecting enemies within radius.
• Slardar - Slithereen Crush
  
  Effect Radius: 350 ( 425)
  Attack Speed Slow: 20/25/30/35 ( 30/35/40/45)
  Duration: 3/4/5/6
  
• Snapfire - Scatterblast
  
  Starting Radius: 225
  Travel Distance: 800
  End Radius: 400
  Attack Speed Slow: 100
  Slow Duration: 1 ( 2)
  
• Sniper - Headshot
  
  Proc Chance: 40%
  Attack Speed Slow: 100
  Slow Duration: 0.1
  
• Solar Crest - Shine
  
  Enemy Attack Speed Slow: 50
  Duration: 12
  
• Storm Spirit - Overload
  
  Effect Radius: 300
  Attack Speed Slow: 80
  Slow Duration: 0.6
  
• Tiny - Grow
  
  Attack Speed Loss: 20/30/40
  
• Tornado - Tempest
  
  Attack Speed Slow: 15
  Aura Linger Duration: 0.5
  Aura, affecting enemies within radius.
• Viper - Corrosive Skin
  
  Attack Speed Slow: 8/16/24/32 ( 16/32/48/64)
  Duration: 4
  
• Viper - Viper Strike
  
  Attack Speed Slow: 40/60/80
  Duration: 5
  
• Visage - Grave Chill
  
  Attack Speed Change: 34/46/58/70
  Duration: 6
  Affects self and Familiars.
• Wraith King - Reincarnation
  
  Enemy Effect Radius: 900
  Attack Speed Slow: 75
  Reincarnation Delay: 3
  Slows all enemies within radius during the Reincarnation delay.

Version History

Version

Description

7.22

• Heroes can now have non-standard initial attack speed values (previously 100 for all heroes).

7.20

• Increased maximum attack speed cap from 600 to 700.

6.83

• Increased maximum attack speed cap from 500 to 600.

Patch History

Patch

Description

24 Mar 2016

• Attack speed changes during an attack now causes the animation and attack timings to update dynamically.

22 Mar 2011

• Fixed minimum attack speed cap.

Mechanics Stats Armor Attributes ( Strength / Agility / Intelligence) Collision size Health (Health regeneration) Magic resistance Mana (Mana regeneration) Movement speed Status resistance Turn rate Vision Gib type Legs Attack Attack animation Attack damage (Heroes) Attack modifier (Bash / Cleave & Splash / Critical strike / Lifesteal / Mana break) Attack range Attack speed Cast animation Cast range Damage types Projectile speed Spell damage Spell lifesteal Abilities Abilities Aura Channeling Cooldown Damage block Damage manipulation Damage over time Evasion Talents Teleport Status effects Attack immunity Break Cyclone Disable Disarm Ethereal Fear Forced movement Hex Hide Hypnosis Invisibility Invulnerability Leash Phased Root Silence Sleep Slow Spell immunity Stun Taunt World Experience Gold Glyph of Fortification Map (Minimap) River Scan Runes Time of day Trees Gameplay Creep control techniques Denying Disjoint Dispel Ganking Harassment Hero complexity Initiating Item passive stacking Item sharing Jungling Lane Pushing Random distribution Roles Trap Units Ancient creeps Buildings Couriers Creep-heroes Heroes Illusions Lane creeps Neutral creeps Roshan Summons & Wards