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Armor
 
 

Ice Armor (Ogre Frostmage) icon.png

▶️ Armored to the teeth!
Clockwerk

Armor ( ) is a stat that reduces (or increases, if negative) physical damage a unit takes from spells and attacks. Every unit is capable of gaining or losing armor, and most units start with a small amount of base armor, some even starting with negative armor. A hero's armor can be passively increased with Agility attribute symbol.png agility via leveling up, certain items, Talent talents and some abilities. Armor of any unit can also be temporarily increased or reduced with some abilities.

Each point of Agility attribute symbol.png agility increases a hero's armor by 0.167 or .

Total armor is defined as

With R being the Total Armor, RB the Base Armor, RnegMu the Armor Negating Multiplier and RBonus the Bonus Armor (Flat armor values other than Agility attribute symbol.png agility sources).

Attribute Bonus Base Armor
Agility attribute symbol.png Agility +0.167

Base Armor[]

Base armor is the part of the main armor that never changes throughout a game. It consists of one fixed value set for each unit individually. The base armor of a unit can be a negative number. Since only heroes have agility, the HUD of all non-hero units shows their base armor.

Heroes[]

Heroes Armor
Puck -3
Lone Druid, Morphling, Skywrath Mage, Viper -2
Abaddon, Alchemist, Ancient Apparition, Arc Warden, Axe, Brewmaster, Chen, Crystal Maiden, Dark Willow, Dazzle, Ember Spirit, Huskar, Lich, Lion, Mars, Medusa, Mirana, Phantom Lancer, Phoenix, Razor, Sand King, Silencer, Sniper, Treant Protector, Troll Warlord, Visage, Void Spirit, Windranger, Wraith King -1
Anti-Mage, Beastmaster, Broodmother, Centaur Warrunner, Clinkz, Clockwerk, Disruptor, Dragon Knight, Drow Ranger, Earth Spirit, Elder Titan, Grimstroke, Hoodwink, Invoker, Juggernaut, Keeper of the Light, Legion Commander, Leshrac, Lina, Lycan, Nature's Prophet, Pudge, Pugna, Queen of Pain, Rubick, Shadow Demon, Slark, Tidehunter, Timbersaw, Tiny, Vengeful Spirit, Venomancer, Weaver, Winter Wyvern, Witch Doctor 0
Bane, Batrider, Bristleback, Death Prophet, Enchantress, Faceless Void, Io, Jakiro, Lifestealer, Magnus, Necrophos, Nyx Assassin, Omniknight, Oracle, Pangolier, Phantom Assassin, Shadow Fiend, Snapfire, Spectre, Sven, Templar Assassin, Tusk, Undying, Ursa, Warlock 1
Bloodseeker, Chaos Knight, Dark Seer, Dawnbreaker, Earthshaker, Enigma, Gyrocopter, Kunkka, Luna, Monkey King, Night Stalker, Shadow Shaman, Spirit Breaker, Storm Spirit, Tinker, Zeus 2
Outworld Destroyer 2.5
Doom, Meepo, Naga Siren, Riki, Slardar, Underlord 3
Bounty Hunter 4
Ogre Magi, Techies, Terrorblade 5

Creeps[]

Units Armor
Ranged Creep, Siege Creep, Super Siege Creep 0
Mega Ranged Creep, Super Ranged Creep 1
Melee Creep 2
Mega Melee Creep, Super Melee Creep 3

Summons[]

Summons Armor
Astral Spirit, Boar, Greater Treant, Lycan Lane Wolf, Lycan Wolf, Spiderite, Spiderling, Treant, Undying Zombie 0
Forged Spirit 0/1/2/3/4/5/6
Familiar 0/2/4
Fire 0/4/8
Skeleton Warrior, Wraith King Skeleton 1
Storm 2
Eidolon 2/3/4/5
Void 3/4/5
Spirit Bear 3/4/5/6
Earth 3/5/7
Necronomicon Archer, Necronomicon Warrior 4
Hawk 5
Warlock Golem 6/9/12

Main Armor[]

Main armor is the armor value shown in white numbers near the shield icon in the HUD, consisting of base armor and the armor granted by a hero's agility. The only way to improve a hero's main armor is to increase its Agility attribute symbol.png agility, which is gained by leveling up, acquiring certain items, or with the help of certain abilities.

The main armor is defined as

With RM being the Main Armor, RB being the Base Armor and RnegMu the Armor Negating Multiplier.

Hero Armor
Hero Base Level 1 Level 15 Level 25 Level 30
Abaddon icon.png Abaddon -1 2.83 6.33 8.83 10.08
Alchemist icon.png Alchemist -1 2.67 6.17 8.67 9.92
Ancient Apparition icon.png Ancient Apparition -1 2.33 7.47 11.13 12.97
Anti-Mage icon.png Anti-Mage 0 4 10.53 15.2 17.53
Arc Warden icon.png Arc Warden -1 2.33 8.17 12.33 14.42
Axe icon.png Axe -1 2.33 7.47 11.13 12.97
Bane icon.png Bane 1 4.67 10.5 14.67 16.75
Batrider icon.png Batrider 1 3.5 7.7 10.7 12.2
Beastmaster icon.png Beastmaster 0 3 6.73 9.4 10.73
Bloodseeker icon.png Bloodseeker 2 5.67 12.9 18.07 20.65
Bounty Hunter icon.png Bounty Hunter 4 7.5 13.57 17.9 20.07
Brewmaster icon.png Brewmaster -1 2.17 6.83 10.17 11.83
Bristleback icon.png Bristleback 1 3.83 8.03 11.03 12.53
Broodmother icon.png Broodmother 0 3.17 11.1 16.77 19.6
Centaur Warrunner icon.png Centaur Warrunner 0 2.5 4.83 6.5 7.33
Chaos Knight icon.png Chaos Knight 2 5 8.27 10.6 11.77
Chen icon.png Chen -1 1.5 6.4 9.9 11.65
Clinkz icon.png Clinkz 0 3.67 9.5 13.67 15.75
Clockwerk icon.png Clockwerk 0 2.17 7.53 11.37 13.28
Crystal Maiden icon.png Crystal Maiden -1 1.67 5.4 8.07 9.4
Dark Seer icon.png Dark Seer 2 5 9.2 12.2 13.7
Dark Willow icon.png Dark Willow -1 2 5.73 8.4 9.73
Dawnbreaker icon.png Dawnbreaker 2 4.33 8.3 11.13 12.55
Dazzle icon.png Dazzle -1 2.33 6.3 9.13 10.55
Death Prophet icon.png Death Prophet 1 3.33 7.53 10.53 12.03
Disruptor icon.png Disruptor 0 2.5 5.77 8.1 9.27
Doom icon.png Doom 3 4.83 6.93 8.43 9.18
Dragon Knight icon.png Dragon Knight 0 3.17 7.83 11.17 12.83
Drow Ranger icon.png Drow Ranger 0 3.33 10.1 14.93 17.35
Earth Spirit icon.png Earth Spirit 0 2.83 8.43 12.43 14.43
Earthshaker icon.png Earthshaker 2 4 7.27 9.6 10.77
Elder Titan icon.png Elder Titan 0 2.33 6.53 9.53 11.03
Ember Spirit icon.png Ember Spirit -1 2.67 9.43 14.27 16.68
Enchantress icon.png Enchantress 1 4.17 8.37 11.37 12.87
Enigma icon.png Enigma 2 4.33 6.67 8.33 9.17
Faceless Void icon.png Faceless Void 1 4.17 11.17 16.17 18.67
Grimstroke icon.png Grimstroke 0 3 7.43 10.6 12.18
Gyrocopter icon.png Gyrocopter 2 6.33 14.03 19.53 22.28
Hoodwink icon.png Hoodwink 0 4 12.4 18.4 21.4
Huskar icon.png Huskar -1 1.17 4.9 7.57 8.9
Invoker icon.png Invoker 0 2.33 6.77 9.93 11.52
Io icon.png Io 1 3.33 7.07 9.73 11.07
Jakiro icon.png Jakiro 1 3.5 6.3 8.3 9.3
Juggernaut icon.png Juggernaut 0 5.67 12.2 16.87 19.2
Keeper of the Light icon.png Keeper of the Light 0 2.5 6.23 8.9 10.23
Kunkka icon.png Kunkka 2 4.33 8.07 10.73 12.07
Legion Commander icon.png Legion Commander 0 3 6.97 9.8 11.22
Leshrac icon.png Leshrac 0 3.83 10.37 15.03 17.37
Lich icon.png Lich -1 1.5 6.17 9.5 11.17
Lifestealer icon.png Lifestealer 1 4.17 10.23 14.57 16.73
Lina icon.png Lina 0 3.83 8.73 12.23 13.98
Lion icon.png Lion -1 2 5.5 8 9.25
Lone Druid icon.png Lone Druid -2 1.33 7.87 12.53 14.87
Luna icon.png Luna 2 6 13.93 19.6 22.43
Lycan icon.png Lycan 0 2.67 6.63 9.47 10.88
Magnus icon.png Magnus 1 3.5 9.33 13.5 15.58
Mars icon.png Mars -1 2.33 6.3 9.13 10.55
Medusa icon.png Medusa -1 2.67 11.07 17.07 20.07
Meepo icon.png Meepo 3 5.83 9.57 12.23 13.57
Mirana icon.png Mirana -1 2 10.63 16.8 19.88
Monkey King icon.png Monkey King 2 5.67 14.3 20.47 23.55
Morphling icon.png Morphling -2 2 11.57 18.4 21.82
Naga Siren icon.png Naga Siren 3 6.5 14.2 19.7 22.45
Nature's Prophet icon.png Nature's Prophet 0 3.67 12.07 18.07 21.07
Necrophos icon.png Necrophos 1 3 6.03 8.2 9.28
Night Stalker icon.png Night Stalker 2 5 10.37 14.2 16.12
Nyx Assassin icon.png Nyx Assassin 1 4 9.83 14 16.08
Ogre Magi icon.png Ogre Magi 5 7.33 10.83 13.33 14.58
Omniknight icon.png Omniknight 1 3.5 8.17 11.5 13.17
Oracle icon.png Oracle 1 3.5 7.47 10.3 11.72
Outworld Destroyer icon.png Outworld Destroyer 2.5 6.17 9.9 12.57 13.9
Pangolier icon.png Pangolier 1 4 11.47 16.8 19.47
Phantom Assassin icon.png Phantom Assassin 1 4.83 12.77 18.43 21.27
Phantom Lancer icon.png Phantom Lancer -1 3.33 10.8 16.13 18.8
Phoenix icon.png Phoenix -1 1 4.03 6.2 7.28
Puck icon.png Puck -3 0.67 6.5 10.67 12.75
Pudge icon.png Pudge 0 2.33 5.6 7.93 9.1
Pugna icon.png Pugna 0 4 7.03 9.2 10.28
Queen of Pain icon.png Queen of Pain 0 3.67 9.5 13.67 15.75
Razor icon.png Razor -1 2.67 8.73 13.07 15.23
Riki icon.png Riki 3 6 9.27 11.6 12.77
Rubick icon.png Rubick 0 3.83 9.67 13.83 15.92
Sand King icon.png Sand King -1 2.17 6.37 9.37 10.87
Shadow Demon icon.png Shadow Demon 0 3 8.13 11.8 13.63
Shadow Fiend icon.png Shadow Fiend 1 4.33 12.5 18.33 21.25
Shadow Shaman icon.png Shadow Shaman 2 4.67 8.4 11.07 12.4
Silencer icon.png Silencer -1 2.67 8.27 12.27 14.27
Skywrath Mage icon.png Skywrath Mage -2 0.17 2.03 3.37 4.03
Slardar icon.png Slardar 3 5.83 11.43 15.43 17.43
Slark icon.png Slark 0 3.5 7.47 10.3 11.72
Snapfire icon.png Snapfire 1 3.67 8.1 11.27 12.85
Sniper icon.png Sniper -1 3.5 10.97 16.3 18.97
Spectre icon.png Spectre 1 4.83 9.73 13.23 14.98
Spirit Breaker icon.png Spirit Breaker 2 4.83 8.8 11.63 13.05
Storm Spirit icon.png Storm Spirit 2 5.67 9.63 12.47 13.88
Sven icon.png Sven 1 4.5 9.17 12.5 14.17
Techies icon.png Techies 5 7.33 10.37 12.53 13.62
Templar Assassin icon.png Templar Assassin 1 4.83 12.3 17.63 20.3
Terrorblade icon.png Terrorblade 5 8.67 18.93 26.27 29.93
Tidehunter icon.png Tidehunter 0 2.5 6 8.5 9.75
Timbersaw icon.png Timbersaw 0 2.67 6.4 9.07 10.4
Tinker icon.png Tinker 2 4.17 6.97 8.97 9.97
Tiny icon.png Tiny 0 0 0 0 0
Treant Protector icon.png Treant Protector -1 1.5 6.17 9.5 11.17
Troll Warlord icon.png Troll Warlord -1 2.5 10.2 15.7 18.45
Tusk icon.png Tusk 1 4.83 9.73 13.23 14.98
Underlord icon.png Underlord 3 5 8.73 11.4 12.73
Undying icon.png Undying 1 2.67 5.47 7.47 8.47
Ursa icon.png Ursa 1 4 10.07 14.4 16.57
Vengeful Spirit icon.png Vengeful Spirit 0 3.33 11.27 16.93 19.77
Venomancer icon.png Venomancer 0 4 10.53 15.2 17.53
Viper icon.png Viper -2 1.5 7.8 12.3 14.55
Visage icon.png Visage -1 0.83 3.87 6.03 7.12
Void Spirit icon.png Void Spirit -1 2.17 7.3 10.97 12.8
Warlock icon.png Warlock 1 2.67 5 6.67 7.5
Weaver icon.png Weaver 0 2.83 10.07 15.23 17.82
Windranger icon.png Windranger -1 1.83 5.1 7.43 8.6
Winter Wyvern icon.png Winter Wyvern 0 2.67 6.63 9.47 10.88
Witch Doctor icon.png Witch Doctor 0 2.17 5.43 7.77 8.93
Wraith King icon.png Wraith King -1 2 5.97 8.8 10.22
Zeus icon.png Zeus 2 3.83 6.63 8.63 9.63

Bonus Armor[]

Bonus armor is the armor value shown in green numbers with a plus on the left, right below the white armor number on a unit's statistics. Whenever an armor granting item or armor increasing ability shows a +Value Armor, e.g. Blade Mail icon.png Blade Mail +6 Armor, it increases the bonus armor of the affected unit.

Probably the most important difference between main and bonus armor is that illusions only benefit from main armor, although their HUD still shows the bonus armor just like on other heroes, to make them less obvious to the enemy.

Some abilities like Marksmanship and Natural Order also only affect main armor.

Modifying Armor[]

A lot of abilities and items have abilities that grant or reduce armor.

These changes mostly affect bonus armor, and never added to the main armor, with Attribute Shift, Essence Shift and Whirling Death being exceptions.

Armor Increasing Abilities[]

The following abilities increase armor:

Armor Increasing Abilities
Armor Increasing Items

Armor Reducing Abilities[]

The following abilities reduce armor:

Armor Reducing Abilities
  • Acid Spray icon.png
    Armor Reduction: 4/5/6/7
    Duration: 16
    Aura, affects enemies within the target area. The debuff lingers for 0.5 seconds.
  • Battle Hunger icon.png
    Enemy Armor Reduction: Upgradable by Aghanim's Scepter. 7
    Non-Hero Multiplier: 0.5
    Duration: 12
    Requires Aghanim's Scepter icon.png Aghanim's Scepter, affects the target enemy.
  • Viscous Nasal Goo icon.png
    Base Armor Reduction: 2
    Armor Reduction per Stack: 1.5/2/2.5/3
    Max stacks: 4 (Upgradable by Aghanim's Scepter. 7)
    Hero Duration: 5
    Creep Duration: 10
    Affects the target enemy. Multiple casts increase the stack count, and refresh the duration of existing stacks.
  • Hairball icon.png
    Once the Hairball reaches the center of the area, every enemy within the radius gets targeted by Viscous Nasal Goo based on the current level.
  • Reality Rift icon.png
    Armor Reduction: 4/5/6/7
    Duration: 6
    Affects the target enemy.
  • Bad Juju icon.png
    Armor Reduction per Cast: 2/2.25/2.5 (Talent 2.5/2.75/3)
    Duration: 8
    Affects nearby enemies whenever casting a spell. Multiple casts increase the stack count, and refresh the duration of existing stacks.
  • Melting Strike (Forged Spirit) icon.png
    Armor Reduction per Attack: 1 (Talent 2)
    Armor Reduction Cap: 20 (Talent 40)
    Duration: 5
    Passive. Affects the attacked enemy. Multiple attacks increase the stack count, and refresh the duration of existing stacks.
  • Howl icon.png
    Armor Reduction: 4/5/6/7
    Duration: 8
    Affects nearby enemies, and all enemies around each Lycan Wolf icon.png Lycan Wolf that is alive.
  • Rip Tide icon.png
    Armor Reduction: 2/4/6/8 (Talent 9/11/13/15) (Upgradable by Aghanim's Shard. , Talent )
    Armor Reduction Duration: 4
    Passive, has a chance to trigger on attacks. Affects nearby enemies.
  • Lucky Shot icon.png
    Armor Reduction: 2/3/4/5
    Duration:
    Has a chance to proc on attack, affecting the attacked enemy.
  • Eye of the Storm icon.png
    Armor Reduction per Strike: 1
    Duration: 30
    Strikes the lowest health enemy within range. Does not reduce armor of hit buildings. The armor duration of each strike is based on the storm's remaining duration.
  • Presence of the Dark Lord icon.png
    Armor Reduction: 4/5/6/7 (Talent 8/9/10/11)
    Aura, affects nearby enemies. The debuff lingers for 0.5 seconds.
  • Slithereen Crush icon.png
    Corrosive Haze Duration: Upgradable by Aghanim's Shard. 5
    Requires Aghanim's Shard icon.png Aghanim's Shard, the current level of Corrosive Haze gets applied to all enemies hit by Slithereen Crush.
  • Corrosive Haze icon.png
    Armor Reduction: 10/15/20 (Talent 14/19/24)
    Duration: 18
    Affects the target enemy.
  • Essence Shift icon.png
    Permanent Agility Steal: 1
    Agility Gained per Attack: 1
    Duration: 3
    The affected target enemy loses 0.167 main armor per permanant Essence Shift debuff stack and 0.167 main armor per temporary Essence Shift debuff stack.
  • Lil' Shredder icon.png
    Armor Reduction (per Attack): 0.75
    Number of Attacks: 6
    Debuff Duration: 5
    The armor reduction is applied on any attacked target, including buildings and allies.
  • Meld icon.png
    Armor Reduction: 5/6/7/8 (Talent 8/9/10/11)
    Debuff Duration: 12
    Affects the attacked enemy.
  • Gush icon.png
    Armor Reduction: 3/4/5/6 (Talent 7/8/9/10)
    Duration: 4
    Affects the target enemy (Upgradable by Aghanim's Scepter. affects all hit enemies).
  • Whirling Death icon.png
    Primary Attribute Reduction: 13%/14%/15%/16% (Talent 23%/24%/25%/26%)
    Armor Lost per Point of Agility: 0.02171/0.02338/0.02505/0.02672 (Talent 0.03841/0.04008/0.04175/0.04342)
    On Agility attribute symbol.png agility heroes, takes away main armor for each lost agility point upon losing it, and grants health back regaining the lost strength after ability duration ends.
  • Wave of Terror icon.png
    Armor Reduction: 3/4/5/6 (Talent 5/6/7/8)
    Duration: 8
    Affects all hit enemies.
  • Poison Attack icon.png
    Armor Reduction per Stack: Upgradable by Aghanim's Shard. 1
    Max Stacks: 5 (Upgradable by Aghanim's Shard. 8)
    Requires Aghanim's Shard icon.png Aghanim's Shard, affects the target enemy.
  • The Swarm icon.png
    Armor Reduction per Tick: 1 (Talent 1.5)
    Beetle Duration: 16
    Affects all hit enemies. The beetles reduce armor in 1.15/1.0/0.85/0.7 second intervals. The reduction lasts as long as the beetles do.
Armor Reducing Items

Armor Negating Abilities[]

Some abilities negate or ignores a unit's armor by reducing or increasing armor based on the unit's armor, effectively removing a percentage of the armor on the target. This Armor negation only affects the armor value of units, their defense class is unaffected and still reduces damage normally.

The following abilities negate base armor:

Armor Negating Abilities
  • Marksmanship icon.png
    Proc Chance: 20%/30%/40%
    Main Armor Reduction: 100%
    Has a chance to completely ignore the target's main armor value on attack, dealing damage as if they had 0 main armor.
  • Natural Order icon.png
    Base Armor Reduction: 40%/60%/80%/100%
    The effects is provided by an aura, affects nearby enemies. The reduction is based on the enemies' main armor. The debuff lingers for 1 second.

Pure Damage[]

Main Articles: Damage Types and HP Removal

Pure Damage is a damage type that is not reduced by Armor or Magic Resistance. It is also not amplified by magical damage amplification abilities, fully ignores Armor and Damage Block. It does not affect invulnerable units.

There are a few sources that can manipulate Pure Damage, with Dispersion is one of them. Pure damage affects units with Spell Immunity (because spell immunity does not block damage), but that does not mean that an ability that deals pure damage is able to target spell immune units.

Talents[]

The following heroes have a Talent talent that grants them bonus armor.

Bonus Level 10 Level 15 Level 20 Level 25
Left Right Left Right Left Right Left Right
Armor
  • Spirit Breaker minimap icon.png +4
  • Batrider minimap icon.png +6
  • Dark Seer minimap icon.png +6
  • Pudge minimap icon.png +4
  • Underlord minimap icon.png +5
  • Bane minimap icon.png +6
  • Centaur Warrunner minimap icon.png +5
  • Arc Warden minimap icon.png +8
  • Juggernaut minimap icon.png +8
  • Nature's Prophet minimap icon.png +8

Besides these, the following heroes have talents which increase the armor of the units they summon

Specific Summons Armor Bonus Talent

Armor Corruption[]

Armor Corruption is granted by choosing a Talent Talent, that causes hero attacks to reduce armor of the attacked target.

Armor Corruption
Cannot be used by illusions. Not disabled by Break. Pierces spell immunity.
Armor Corruption icon.png
Ability
Passive
Affects
Enemies
There is no description for this ability.
Armor Reduction: 3
Duration: 10
Modifiers
Debuff modifier_armor_corruption: Dispellable with any dispel.


Notes:

  • Successive attacks do not stack the debuff, but refresh the duration instead.
  • The attacks first apply the debuff, then their own damage.
  • Works against wards, buildings, and allied units.
  • Fully stacks with any other items or other sources of Armor Corruption.

The following heroes have a Talent talent that grants them Armor Corruption.

Bonus Level 10 Level 15 Level 20 Level 25
Left Right Left Right Left Right Left Right
Armor Corruption
  • Visage minimap icon.png -3
  • Hoodwink minimap icon.png -3
  • Phantom Assassin minimap icon.png -3

Items[]

Armor Granting Items
Item Value Item cost Cost per value point
Arcane Ring icon.png Arcane Ring 2 N/A N/A
Arcanist's Armor icon.png Arcanist's Armor 5 N/A N/A
Armlet of Mordiggian (Inactive) icon.png Armlet of Mordiggian 6 2475 Gold 412.5 Gold
Assault Cuirass icon.png Assault Cuirass 10 5125 Gold 512.5 Gold
Blade Mail icon.png Blade Mail 6 2125 Gold 354.17 Gold
Blast Rig icon.png Blast Rig 7 N/A N/A
Broom Handle icon.png Broom Handle 3 N/A N/A
Buckler (Inactive) icon.png Buckler 1 425 Gold 425 Gold
Chainmail icon.png Chainmail 4 550 Gold 137.5 Gold
Cloak of Flames icon.png Cloak of Flames 4 N/A N/A
Crimson Guard icon.png Crimson Guard 6 3650 Gold 608.33 Gold
Dragon Scale icon.png Dragon Scale 5 N/A N/A
Ex Machina icon.png Ex Machina 25 N/A N/A
Guardian Greaves icon.png Guardian Greaves 4 5200 Gold 1300 Gold
Helm of Iron Will icon.png Helm of Iron Will 6 950 Gold 158.33 Gold
Helm of the Dominator icon.png Helm of the Dominator 6 2350 Gold 391.67 Gold
Helm of the Overlord icon.png Helm of the Overlord 7 6275 Gold 896.43 Gold
Lotus Orb icon.png Lotus Orb 10 3850 Gold 385 Gold
Medallion of Courage icon.png Medallion of Courage 5 1025 Gold 205 Gold
Mekansm icon.png Mekansm 4 1875 Gold 468.75 Gold
Nullifier icon.png Nullifier 8 4725 Gold 590.63 Gold
Phase Boots icon.png Phase Boots 4 1500 Gold 375 Gold
Platemail icon.png Platemail 10 1400 Gold 140 Gold
Ring of Protection icon.png Ring of Protection 2 175 Gold 87.5 Gold
Shiva's Guard icon.png Shiva's Guard 15 4850 Gold 323.33 Gold
Solar Crest icon.png Solar Crest 6 2625 Gold 437.5 Gold
Soul Ring icon.png Soul Ring 2 680 Gold 340 Gold
Spirit Vessel icon.png Spirit Vessel 2 2840 Gold 1420 Gold
The Leveller icon.png The Leveller 5 N/A N/A
Urn of Shadows icon.png Urn of Shadows 2 840 Gold 420 Gold
Witch Blade icon.png Witch Blade 6 2600 Gold 433.33 Gold
Wraith Band icon.png Wraith Band 1.5 505 Gold 336.67 Gold

Damage Multiplier[]

All units, including buildings, have an inherent base armor value and defense class. Any physical damage dealt to a unit is multiplied by the damage multiplier, resulting in either damage reduction or increase depending on the target's armor value.

Damage Multiplier is also used to calculate a unit's Effective HP (EHP). The lower the damage multiplier, the higher the Effective HP of a unit, vice versa.

Armor Formula Base b Armor Formula Factor f
1 0.06

For any real-valued armor, the damage multiplier is defined as

With DMu being the Damage Multiplier and R the armor value.

The damage multiplier limits are 0 and 2 , for infinitely positive and negative armor, respectively. Expand the table below for a more detailed information on how much positive and negative armor affects damage multiplier.

Examples
Armor (+) Multiplier Armor (-) Multiplier
1 94% -1 106%
2 89% -2 111%
3 85% -3 115%
4 81% -4 119%
5 77% -5 123%
6 74% -6 126%
7 70% -7 130%
8 68% -8 132%
9 65% -9 135%
10 63% -10 138%
11 60% -11 140%
12 58% -12 142%
13 56% -13 144%
14 54% -14 146%
15 53% -15 147%
16 51% -16 149%
17 50% -17 150%
18 48% -18 152%
19 47% -19 153%
20 45% -20 155%
21 44% -21 156%
22 43% -22 157%
23 42% -23 158%
24 41% -24 159%
25 40% -25 160%
26 39% -26 161%
27 38% -27 162%
28 37% -28 163%
29 36% -29 164%
30 36% -30 164%
31 35% -31 165%
32 34% -32 166%
33 34% -33 166%
34 33% -34 167%
35 32% -35 168%
36 32% -36 168%
37 31% -37 169%
38 30% -38 170%
39 30% -39 170%
40 29% -40 171%
41 29% -41 171%
42 28% -42 172%
43 28% -43 172%
44 27% -44 173%
45 27% -45 173%

Defense Classes[]

There are several different classes of armor defense (also known as armor type), which determine how much damage a unit takes against certain attack classes. Each of the 3 different defense classes (Hero, Basic, Structure) either reduces, increases or does not affect the damage from each of the attack classes, on top of armor values manipulating them.

Attack damage dealt against defense class is defined as

With A being the Attack Damage, RTMu being the Defense Class Damage Multiplier and DMu being the Damage Multiplier.

The following table shows how much damage each defense class reduces against each attack class, and the unit's defense class (units which take a set amount of damage per attack are excluded).

Defense Class Used by Attack Class Against Armor Multiplier RTMu
Hero Basic Pierce Siege
Hero Death Ward, Earth, Familiar, Fire, Roshan, Spirit Bear, Storm, Tempest Double, Void, Warlock Golem 100% 75% 50% 100%
Basic Alpha Wolf, Ancient Black Dragon, Ancient Black Drake, Ancient Granite Golem, Ancient Rock Golem, Ancient Rumblehide, Ancient Thunderhide, Animal Courier, Astral Spirit, Beetle, Boar, Centaur Conqueror, Centaur Courser, Courier, Dark Troll Summoner, Eidolon, Fell Spirit, Flying Courier, Forged Spirit, Ghost, Giant Wolf, Greater Treant, Harpy Scout, Harpy Stormcrafter, Hawk, Healing Ward, Hellbear Smasher, Hellbear, Hill Troll Berserker, Hill Troll Priest, Hill Troll, Homing Missile, Ice Spire, Ignis Fatuus, Kobold Foreman, Kobold Soldier, Kobold, Lycan Lane Wolf, Lycan Wolf, Mega Melee Creep, Mega Ranged Creep, Melee Creep, Mud Golem, Necronomicon Archer, Necronomicon Warrior, Nether Ward, Nimbus, Observer Ward, Ogre Bruiser, Ogre Frostmage, Phantom, Phoenix Sun, Plague Ward, Power Cog, Proximity Mine, Psionic Trap, Ranged Creep, Remote Mine, Satyr Banisher, Satyr Mindstealer, Satyr Tormenter, Sentry Ward, Serpent Ward, Shard Golem, Skeleton Archer, Skeleton Warrior, Spiderite, Spiderling, Spin Web, Stasis Trap, Super Melee Creep, Super Ranged Creep, Tombstone, Tornado, Treant, Undying Zombie, Vhoul Assassin, Wildwing Ripper, Wildwing, Wraith King Skeleton 100% 100% 150% 100%
Structure Ancient, Effigy Building, Fiend's Gate, Fountain, Melee Barracks, Outpost, Ranged Barracks, Siege Creep, Super Siege Creep, Tower (Tier 1), Tower (Tier 2), Tower (Tier 3), Tower (Tier 4) 50% 70% 35% 250%

Examples

Sven minimap icon.png Sven with 100 damage attacks a siege creep which has 0 armor and deals 50 damage to it. If the siege creep gained 5 armor, how much the 100 damage attack would deal?
Unknown Unit icon.png Siege Creep's Base Armor for this example is 5.
Unknown Unit icon.png Siege Creep's Damage Multiplier is 0.76923.
According to the table values, the attack class multiplier is 0.5 because the attack class "hero" (from Sven minimap icon.png Sven) deals 50% less damage against the defense class "structure" (to the Siege Creep).
Therefore in this example, Sven minimap icon.png Sven's 100 damage attack to the siege creep with 5 armor would be 38.4615. The same attack would deal 76.923 damage to a unit with any other defense class, since attack class hero deals full damage to them.

Effective HP[]

Relationships between Effective HP%, damage multiplier and armor

The total amount of physical damage a unit can take due to the armor it has is known as Effective HP (or EHP). 16.66 armor adds 100% to EHP. This means a unit with 1000 health and 16.66 armor can take 2000 physical damage. The formula adds 6% EHP per point of armor regardless of the previous armor value.

However, EHP value is of a diminished benefit as a player gaining 1 armor from 0 armor would increase EHP from 100% to 106%, while a player gaining 1 armor from 50 armor would increase EHP from 400% to 406%. On the other hand, the effectiveness of armor is much lower at negative values (refer to the attached graph). Total EHP trends downwards towards 50%, meaning a unit with 1000 health and infinitely low armor would still be able to take 500 physical damage. At this point, losing or gaining 1 armor has essentially no effect.

Armor -40 -30 -20 -10 0 10 20 30 40
Effective HP 586.21 608.7 647.06 727.27 1000 1600 2200 2800 3400

This definition of EHP assumes all damage taken is physical. EHP against magical damage (such as Laguna Blade or Finger of Death) is modified by magic resistance.

Effective HP against physical damage is defined as

With CHP being the Current Health and DMu the Damage Manipulation.

Examples[]

Example 1
A Level 25 Sven minimap icon.png Sven has a total health of 2176 and 12.5 points of armor without any items. What is his effective HP against physical damage?
Sven minimap icon.png Sven's damage multiplier is 0.571429 in this example.
Sven minimap icon.png Sven's effective HP against physical damage in this example is 3808.
Example 2
The same Level 25 Sven minimap icon.png Sven from the previous example (has a total health of 2176) is affected by a Level 3 Corrosive Haze, and his armor is now -7.5. What is his effective HP against physical damage?
Sven minimap icon.png Sven's damage multiplier is 1.31034 in this example.
Sven minimap icon.png Sven's effective HP against physical damage in this example is 1660.63.

Trivia[]

Negative armor damage multiplier for DotA and Dota 2

This graph shows how much more additional damage a target takes when armor debuffs are applied, using the WC3 DotA armor formula.

  • In DotA the base magic resistance was bound to the assigned armor. In case of Hero Armor only 75% of the magic damage was applied. Some heroes possessed hidden passive skills to alter their base magic susceptibility albeit Hero Armor to 90% (Visage minimap icon.png Visage) or 65% (Meepo minimap icon.png Meepo). Nowadays, in Dota 2 magic resistance works independently from armor.
  • In 6.86 defense classes were renamed and some other classes were removed.
    • The following defense classes were renamed: Unarmored ➜ Soft, Light ➜ Weak, Medium ➜ Basic, Heavy ➜ Strong and Fortified ➜ Structure.
    • Weak and Basic defense classes were removed. Units who previously uses the Weak and Basic defense class now use the Soft and Strong defense class respectively.

Negative Armor Disparity[]

Amplified damage from negative armor is calculated differently in WC3 DotA than in Dota 2.[1]

Negative armor in WC3 DotA has a cap of -20 armor (71% damage increase). Further reducing the armor does not change the damage increase.[2] Also, the more aggressive damage amplify formula is used resulting in a max damage increase of 71%.

The amplified damage is defined as

With R being the armor value.

Comparison table

Recent Changes[]

Main Article: Armor/Changelogs

References[]


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