Armor

Armor

 

Old Mechanics

 

Changelogs

 

“

▶️ Armored to the teeth! — Clockwerk

”

Armor is a stat that reduces (or increases, if negative) physical damage a unit takes from abilities 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 via leveling up, certain items, talents and some abilities. Armor of any unit can also be temporarily increased or reduced with some abilities.

Each point of agility increases a hero's armor by 0.167 or $\tfrac{1}{6}$.

• Total armor can be defined as
  • Main Armor
    • × % Armor Negation Multiplier
  • ± Flat Bonus Armor Values

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
	-3
	-2
	-1
	0
	1
	2
	2.5
	3
	3.8
	4
	5

Creeps

Units	Armor
Boar, Hill Troll, Hill Troll Priest, Kobold, Lycan Lane Wolf, Lycan Wolf, Mega Siege Creep, Mud Golem, Ogre Frostmage, Ranged Creep, Satyr Banisher, Shard Golem, Siege Creep, Skeleton Warrior, Spiderite, Spiderling, Super Siege Creep, Treant, Undying Zombie	0
Forged Spirit	0/1/2/3/4/5/6/7
Centaur Courser, Fell Spirit, Giant Wolf, Harpy Scout, Hill Troll Berserker, Kobold Soldier, Mega Ranged Creep, Minor Imp, Ogre Bruiser, Super Ranged Creep, Vhoul Assassin	1
Ancient Black Drake, Flagbearer Creep, Ghost, Harpy Stormcrafter, Kobold Foreman, Melee Creep, Satyr Mindstealer, Satyr Tormenter, Wildwing	2
Eidolon	2/3/4/5
Tormentor	20
Alpha Wolf, Ancient Ice Shaman, Ancient Rumblehide, Ancient Thunderhide, Hellbear, Mega Flagbearer Creep, Mega Melee Creep, Super Flagbearer Creep, Super Melee Creep, Wraith King Skeleton	3
Roshan	30
Ancient Black Dragon, Ancient Rock Golem, Centaur Conqueror, Dark Troll Summoner, Hellbear Smasher, Necronomicon Archer, Necronomicon Warrior, Wildwing Ripper	4
Hawk	5
Warpine Raider	6
Ancient Frostbitten Golem	7
Ancient Granite Golem	8

Summons

Summons	Armor
Astral Spirit	0
Familiar	0/2/4
Spirit Bear	0/2/4/6
Fire	0/8/16
Storm	2
Mars Soldier	3
Void	3/4/5
Earth	3/5/7
Warlock Golem	8/12/14

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, which is gained by leveling up, acquiring certain items, or with the help of certain abilities.

Attribute	Bonus Main Armor
Agility	+0.167

The main armor is defined as

Main Armor = (Base Armor + (Σ Current)/6) × (1 - Armor Negation)

Hero Armor

Hero Base Level 1 Level 15 Level 25 Level 30 Abaddon 3.8 7.63 10.67 12.83 13.92 Alchemist 0 3.67 7.17 9.67 10.92 Ancient Apparition -1 2.33 7.47 11.13 12.97 Anti-Mage 1 5 11.53 16.2 18.53 Arc Warden 0 3.33 10.33 15.33 17.83 Axe -1 2.33 6.3 9.13 10.55 Bane 1 4.83 10.67 14.83 16.92 Batrider 2 4.5 7.77 10.1 11.27 Beastmaster -1 2 5.73 8.4 9.73 Bloodseeker 2 6 13.23 18.4 20.98 Bounty Hunter 5 8.5 14.57 18.9 21.07 Brewmaster 0 3.17 7.83 11.17 12.83 Bristleback 1 3.83 8.03 11.03 12.53 Broodmother -1 2 8.07 12.4 14.57 Centaur Warrunner -2 0.5 2.83 4.5 5.33 Chaos Knight 2 5 8.27 10.6 11.77 Chen -1 1.5 6.4 9.9 11.65 Clinkz 0 4.17 10.47 14.97 17.22 Clockwerk 1 3.17 8.07 11.57 13.32 Crystal Maiden 0 2.67 6.4 9.07 10.4 Dark Seer 2 5.17 9.37 12.37 13.87 Dark Willow 0 3 6.03 8.2 9.28 Dawnbreaker 2 4.33 8.3 11.13 12.55 Dazzle 0 3.33 6.6 8.93 10.1 Death Prophet 1 3.67 8.33 11.67 13.33 Disruptor 0 2.5 5.77 8.1 9.27 Doom 2 4.5 8 10.5 11.75 Dragon Knight 0 2.67 7.33 10.67 12.33 Drow Ranger 0 3.33 10.1 14.93 17.35 Earth Spirit 0 2.83 8.43 12.43 14.43 Earthshaker 2 4 7.27 9.6 10.77 Elder Titan 0 2.67 6.87 9.87 11.37 Ember Spirit 0 3.67 11.13 16.47 19.13 Enchantress 1 4.17 9.07 12.57 14.32 Enigma 1 3.33 5.67 7.33 8.17 Faceless Void 0 3.17 10.17 15.17 17.67 Grimstroke 0 3 7.43 10.6 12.18 Gyrocopter 2 6.33 13.57 18.73 21.32 Hoodwink 0 4 12.4 18.4 21.4 Huskar -1 0.67 4.17 6.67 7.92 Invoker -1 1.33 5.53 8.53 10.03 Io 1 3.33 7.07 9.73 11.07 Jakiro 1 3.5 6.3 8.3 9.3 Juggernaut 0 5.67 12.2 16.87 19.2 Keeper of the Light 0 2.5 6.23 8.9 10.23 Kunkka 2 4.33 8.07 10.73 12.07 Legion Commander 0 3 6.97 9.8 11.22 Leshrac 0 3.83 10.37 15.03 17.37 Lich -1 1.83 6.5 9.83 11.5 Lifestealer 1 4.17 10.23 14.57 16.73 Lina 0 3.83 9.43 13.43 15.43 Lion 0 2.5 6 8.5 9.75 Lone Druid 0 3.33 8 11.33 13 Luna 2 6 13.93 19.6 22.43 Lycan 0 3 7.2 10.2 11.7 Magnus 1 2.5 7.17 10.5 12.17 Marci 0 3.33 7.53 10.53 12.03 Mars -1 2.33 6.3 9.13 10.55 Medusa -1 2.67 11.07 17.07 20.07 Meepo 4 6.83 11.73 15.23 16.98 Mirana -2 2 7.83 12 14.08 Monkey King 2 5.83 14.47 20.63 23.72 Morphling -2 2 11.1 17.6 20.85 Muerta -1 2.33 8.63 13.13 15.38 Naga Siren 1 4.5 12.2 17.7 20.45 Nature's Prophet 0 2.33 9.8 15.13 17.8 Necrophos 2 4 7.03 9.2 10.28 Night Stalker 2 5 10.13 13.8 15.63 Nyx Assassin 1 4 9.83 14 16.08 Ogre Magi 4 6.33 9.83 12.33 13.58 Omniknight 2 4.5 9.17 12.5 14.17 Oracle 1 3.5 7.47 10.3 11.72 Outworld Destroyer 2.5 6.17 9.9 12.57 13.9 Pangolier 2 5 10.83 15 17.08 Phantom Assassin 1 4.5 12.43 18.1 20.93 Phantom Lancer -1 3.33 9.87 14.53 16.87 Phoenix -1 1 4.5 7 8.25 Primal Beast 2 4.5 6.83 8.5 9.33 Puck -3 0.67 6.5 10.67 12.75 Pudge -1 1.33 4.6 6.93 8.1 Pugna 0 3.5 6.53 8.7 9.78 Queen of Pain 0 3.67 9.5 13.67 15.75 Razor 0 4 10.53 15.2 17.53 Riki 0 5 10.6 14.6 16.6 Rubick 1 4.83 10.67 14.83 16.92 Sand King 1 4.17 8.37 11.37 12.87 Shadow Demon 0 3 8.13 11.8 13.63 Shadow Fiend 1 5.17 13.33 19.17 22.08 Shadow Shaman 3 5.67 9.4 12.07 13.4 Silencer 0 3.67 9.27 13.27 15.27 Skywrath Mage -2 0.17 2.03 3.37 4.03 Slardar 3 5.83 11.43 15.43 17.43 Slark 0 3.5 7 9.5 10.75 Snapfire 1 3.67 6.47 8.47 9.47 Sniper -1 3.5 10.97 16.3 18.97 Spectre 0 4.17 9.07 12.57 14.32 Spirit Breaker 1 3.83 7.8 10.63 12.05 Storm Spirit 1 4.67 10.73 15.07 17.23 Sven -1 2.5 7.63 11.3 13.13 Techies 2 4.33 7.37 9.53 10.62 Templar Assassin 0 3.83 11.3 16.63 19.3 Terrorblade 5 8.67 18 24.67 28 Tidehunter 0 2.5 6 8.5 9.75 Timbersaw 0 2.67 5.7 7.87 8.95 Tinker 4 6.83 10.1 12.43 13.6 Tiny 0 0 0 0 0 Treant Protector -1 1.5 5.7 8.7 10.2 Troll Warlord -1 2.83 10.53 16.03 18.78 Tusk 1 4.83 9.73 13.23 14.98 Underlord 3 5 8.73 11.4 12.73 Undying 1 2.67 5.47 7.47 8.47 Ursa 1 4 10.53 15.2 17.53 Vengeful Spirit 0 3.5 8.4 11.9 13.65 Venomancer 0 4 8.67 12 13.67 Viper -2 1.5 7.8 12.3 14.55 Visage -1 0.83 3.17 4.83 5.67 Void Spirit -1 2.17 7.3 10.97 12.8 Warlock 1 2.67 5 6.67 7.5 Weaver 1 3.83 11.07 16.23 18.82 Windranger 0 3.17 6.43 8.77 9.93 Winter Wyvern 1 3.67 7.17 9.67 10.92 Witch Doctor 0 2.17 5.43 7.77 8.93 Wraith King -1 1.67 5.63 8.47 9.88 Zeus 2 3.83 6.63 8.63 9.63

Main Armor Sources

These abilities directly manipulate agility points and therefore it affects main armor instead.

Sources affecting Main Armor

• Attributes – Attribute Bonus
• Alchemist – Aghanim's Scepter Synth
• Apex – Primary Attribute Bonus
• Drow Ranger – Marksmanship
• Magnus – Reverse Polarity¹
• Morphling – Adaptive Strike (Agility)
• Riki – Tricks of the Trade
• Slark – Essence Shift
• Power Treads – Switch Attribute
• Phantom Lancer – Phantom Rush
• Morphling – Morph^2a
• Vambrace – Switch Attribute
• Morphling – Attribute Shift (Strength Gain)
• Timbersaw – Whirling Death³

¹ Requires talent.

^2a Requires Aghanim's Scepter.

^2b Requires Aghanim's Shard.

³ Only affects agility and universal heroes.

Armor Negating Sources

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

Armor Negating Sources

• Drow Ranger - Marksmanship
  
  Proc Chance: 15%/20%/25%
  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.
• Elder Titan - Natural Order
  
  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.

Example

How much main armor does Terrorblade with a Blade of Alacrity have at Level 8?

Base Armor: 5

Base Agility and agility gain: 22 and 4 per level

Blade of Alacrity bonus agility: 10

$\begin{align} \text{Main Armor} &= 5 + \overbrace{\frac{ 10 + 22 + 4 \times 7}{6} }^\text{Agility} \\ &= 15 \end{align}$

Terrorblade has a total of 15 main armor in this example.

Bonus Armor

Bonus armor is the armor value shown in green numbers with a plus on the left, right after 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 +7 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.

Sources of multiple bonus armor stack additively.

Armor Negation sources do not affect bonus armor.

Example1

How much total armor does a Terrorblade with a Blade of Alacrity and Blade Mail at Level 8 have?

Base Armor: 5

Base Agility and gain: 22 + 4

Blade of Alacrity bonus agility: 10

Blade Mail bonus armor: 7

$\begin{align} \text{Armor} &= \underbrace{ 5 + \overbrace{\frac{ 10 + 22 + 4 \times 7}{6} }^\text{Agility} }_\text{Main Armor} + 7 \\ &= 15 + 7 \\ &= 22 \end{align}$

Terrorblade has 22 total armor in this example.

Example 2

Terrorblade from the previous example is now affected by Level 3 Natural Order. How much total armor does he have now?

Level 3 Natural Order Armor Negation: 80%

$\begin{align} \text{Armor} &= \underbrace{ \left( 5 + \overbrace{\frac{ 10 + 22 + 4 \times 7}{6} }^\text{Agility} \right) \times \overbrace{ (1 - 0.8) }^\text{Main Armor Negation} }_\text{Main Armor} + 7 \\ &= \underbrace{ 15 \times (0.2) }_\text{Main Armor} + 7 \\ &= 10 \end{align}$

Terrorblade has 10 total armor in this example.

Modifying Armor

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

These changes only affect bonus armor. Reductions can nevertheless bring total armor into negative values if main armor is sufficiently small.

Armor Increasing Sources

Armor Increasing Sources

• Ancient Black Dragon – Dragonhide Aura
• Axe – Berserker's Call
• Axe – Battle Hunger^2a
• Axe – Culling Blade
• Chen – Divine Favor
• Crystal Maiden – Freezing Field
• Dazzle – Bad Juju
• Dragon Knight – Dragon Blood
• Elder Titan – Astral Spirit
• Enchantress – Enchant^{1 3}
• Lone Druid – Spirit Link
• Lone Druid – True Form
• Monkey King – Wukong's Command
• Ogre Frostmage – Ice Armor
• Oracle – False Promise¹
• Primal Beast – Uproar
• Razor – Static Link¹
• Roshan – Strength of the Immortal
• Skywrath Mage – Shield of the Scion
• Slardar – Guardian Sprint^2a
• Sven – Warcry
• Timbersaw – Reactive Armor
• Tiny – Grow
• Treant Protector – Living Armor
• Towers – Tower Protection
• Troll Warlord – Berserker's Rage
• Vengeful Spirit – Wave of Terror¹
• Visage – Gravekeeper's Cloak^{1 4}
• Wildwing Ripper – Toughness Aura

¹ Requires talent.

^2a Requires Aghanim's Scepter.

^2b Requires Aghanim's Shard.

³ Affects the player-controlled creep.

Armor Increasing Item Sources

• Armlet of Mordiggian – Unholy Strength
• Assault Cuirass – Assault Aura
• Buckler – Buckler Aura
• Craggy Coat – Toughen Up
• Guardian Greaves – Guardian Aura
• Solar Crest – Shine
• Helm of the Dominator – Dominate¹
• Helm of the Overlord – Dominate¹
• Vladmir's Offering – Vladmir's Aura

¹ Affects the player-controlled creep.

Talents

Armor

Ability
Passive

Affects
Self

There is no description for this ability.

Armor Bonus: Varies

• Grants a flat armor bonus.

• The following values exist:
  • 2/3/4/5/6/7/8/9/10/12/15/20/30

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

Bonus	Level 10		Level 15		Level 20		Level 25
	Left	Right	Left	Right	Left	Right	Left	Right
Armor	+4	+5 +5

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

Specific Summons Armor Bonus Talent

• Lone Druid - Talent by Level 15 Left
  
  +7 Spirit Bear Armor:
  Bonus armor.
• Warlock - Talent by Level 25 Right
  
  +20 Chaotic Offering Golems Armor:
  Bonus armor.

Items

The following items increase a unit's armor. The effects are limited to the item's owner, which must have the item equipped.

Items that provide armor bonus by flat amount and Agility:

Bonus Agility and Bonus Armor

Item	Value	Item Cost	Cost/Value Point
Defiant Shell	8.17	N/A	N/A
Helm of the Dominator	7	2625	375
Helm of the Overlord	10.5	5725	545.24
Shiva's Guard	15.83	5175	326.84
Solar Crest	4.67	2700	578.57
Spirit Vessel	3	2780	926.67
Urn of Shadows	2.33	880	377.14
Veil of Discord	4.67	1725	369.64
Wraith Band 1	2.83	505	178.24
Wraith Band 2	5.67	505	89.12

These items have a flat armor bonus to the hero who has them equipped.

Flat Bonus Armor

Item	Value	Item Cost	Cost/Value Point
Arcane Ring	2	N/A	N/A
Arcanist's Armor	5	N/A	N/A
Armlet of Mordiggian	6	2500	416.67
Assault Cuirass	10	5125	512.5
Blade Mail	7	2100	300
Broom Handle	4	N/A	N/A
Buckler	1	425	425
Chainmail	4	550	137.5
Cloak of Flames	4	N/A	N/A
Craggy Coat	8	N/A	N/A
Crimson Guard	8	3725	465.63
Dragon Scale	5	N/A	N/A
Guardian Greaves	4	4950	1237.5
Helm of Iron Will	4	975	243.75
Lotus Orb	10	3850	385
Mekansm	4	1775	443.75
Nullifier	10	4375	437.5
Orb of Corrosion	3	900	300
Parasma	6	5975	995.83
Pavise	2	1400	700
Phase Boots	4	1500	375
Platemail	10	1400	140
Rattlecage	12	N/A	N/A
Ring of Protection	2	175	87.5
Soul Ring	2	805	402.5
Vladmir's Offering	2	2200	1100
Witch Blade	6	2775	462.5

These items increase the hero's armor through the agility they provide.

Agility Base Armor

Item	Value	Item Cost	Cost/Value Point
Aghanim's Scepter	1.67	4200	2520
Band of Elvenskin	1	450	450
Blade of Alacrity	1.67	1000	600
Book of Shadows	2.17	N/A	N/A
Bracer 1	0.33	505	1515
Bracer 2	0.67	505	757.5
Butterfly	5.83	5450	934.29
Circlet	0.33	155	465
Crown	0.67	450	675
Diadem	1	1000	1000
Diffusal Blade	2.5	2500	1000
Disperser	6.67	6100	915
Dragon Lance	2.5	1900	760
Eaglesong	4.17	2800	672
Ethereal Blade	1.33	5375	4031.25
Eye of Skadi	3.67	5300	1445.45
Ghost Scepter	0.83	1500	1800
Harpoon	1.67	4700	2820
Holy Locket	1.5	2350	1566.67
Hurricane Pike	3.33	4450	1335
Iron Branch	0.17	50	300
Khanda	1.33	5000	3750
Linken's Sphere	2.67	4800	1800
Magic Wand	0.5	450	900
Manta Style	4.33	4550	1050
Meteor Hammer	1	2850	2850
Mirror Shield	1.67	N/A	N/A
Ninja Gear	3.33	N/A	N/A
Null Talisman 1	0.33	505	1515
Null Talisman 2	0.67	505	757.5
Occult Bracelet	0.5	N/A	N/A
Phylactery	1.17	2400	2057.14
Pig Pole	0.67	N/A	N/A
Power Treads (Agility)	1.67	1400	840
Sange and Yasha	2.67	4050	1518.75
Slippers of Agility	0.5	140	280
Specialist's Array	1	N/A	N/A
Swift Blink	4.17	6800	1632
Ultimate Orb	2.5	2800	1120
Vambrace (Agility)	1.33	N/A	N/A
Vambrace (Intelligence)	0.33	N/A	N/A
Vambrace (Strength)	0.33	N/A	N/A
Yasha	2.67	2100	787.5
Yasha and Kaya	2.67	4000	1500

Armor Reducing Sources

Armor Reducing Sources

• Alchemist – Acid Spray
• Ancient Rock Golem – Weakening Aura
• Axe – Battle Hunger^2a
• Bristleback – Viscous Nasal Goo
• Bristleback – Hairball
• Chaos Knight – Reality Rift
• Dazzle – Bad Juju
• Forged Spirit – Melting Strike
• Lycan – Howl
• Naga Siren – Rip Tide
• Pangolier – Lucky Shot
• Razor – Eye of the Storm
• Razor – Static Link¹
• Shadow Fiend – Presence of the Dark Lord
• Slardar – Slithereen Crush^2b
• Slardar – Corrosive Haze
• Snapfire – Lil' Shredder
• Templar Assassin – Meld
• Tidehunter – Gush
• Vengeful Spirit – Wave of Terror
• Viper – Poison Attack^2b
• Weaver – The Swarm

¹ Requires talent.

^2a Requires Aghanim's Scepter.

^2b Requires Aghanim's Shard.

Armor Reducing Item Sources

• Assault Cuirass – Assault Aura
• Mask of Madness – Berserk
• Blight Stone – Lesser Corruption
• Desolator – Corruption
• Orb of Corrosion – Corrosion
• Orb of Destruction – Impeding Corruption
• Stygian Desolator – Greater Corruption

Armor Corruption

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

Armor Corruption

Ability
Passive

Affects
Enemies

There is no description for this ability.

Armor Reduction: Varies

Duration: 10

Modifiers [?]

modifier_armor_corruption

Any

• Causes the hero's attacks to place a debuff on the target that reduces the target's armor.

• 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 armor reduction values exist:
  • 2.5/3/4/5

The following heroes have a 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					-4

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 being one of them. This mechanic is called damage reduction. 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.

Abilities Based on Armor

Armor Based Ability Effects

• Axe - Battle Hunger
  
  Armor as Damage per Second: 100% ( 200%)
  Non-Hero Armor Multiplier: 0.5
  Deals damage based on the hero's armor.

Damage Multiplier

All units, including buildings, have an inherent base armor value and attack 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

$\begin{align} D_{Mu} &= 1 - \displaystyle\frac{ f \times R }{ b + f \times \vert R \vert} \quad \& \quad 0 \leq D_{Mu} \leq 2 \\ \\ &= 1 - \displaystyle\frac{ 0.06 \times R }{ 1 + 0.06 \times \vert R \vert} \end{align}$

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 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%

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.

EHP value has no 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%. This means each point of armor effects your HP and your survivability in the exact same way. 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

$E_{HP} = \displaystyle\frac{ C_{HP} }{ D_{Mu} }$

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

Example 1

A Level 25 Sven has a total health of 2293.6 and 11.3 points of armor without any items. What is his effective HP against physical damage?

${\begin{aligned}D_{Mu}&=1-{\frac {0.06\times 11.3}{1+0.06\times \vert 11.3\vert }}\\\\&=0.595948\end{aligned}}$

Sven's damage multiplier is 0.595948 in this example.

${\begin{aligned}E_{HP}&={2293.6 \over 0.595948}\\\\&=3848.66\end{aligned}}$

Sven's effective HP against physical damage in this example is 3848.66.

Example 2

The same Level 25 Sven from the previous example (has a total health of 2293.6) is affected by a Level 3 Corrosive Haze, and his armor is now -8.7. What is his effective HP against physical damage?

${\begin{aligned}D_{Mu}&=1-{\frac {0.06\times (-8.7)}{1+0.06\times \vert -8.7\vert }}\\\\&=1.34297\end{aligned}}$

Sven's damage multiplier is 1.34297 in this example.

${\begin{aligned}E_{HP}&={2293.6 \over 1.34297}\\\\&=1707.86\end{aligned}}$

Sven's effective HP against physical damage in this example is 1707.86.

Recent Changes

Main Article: Armor/Changelogs

Version

Description

7.32e

• Reinforced units receive 10% less damage from the following units:
  • Summons, but not including creep-heroes and illusions.
  • Dominated Creeps.

7.31

• Attack Types and Armor Types are now represented through abilities, most damage remains unchanged.
• ADDED
  the new following attack type abilities:
  • Runty has 25% and 30% attack damage reduction against Heroes and Reinforced units respectively.
  • Piercing has 50% and 65% attack damage reduction against Heroes and Reinforced units respectively.
    • However, they deal 50% more attack damage against Non-Hero units.
  • Reinforced has 50%, 30% and 65% incoming attack damage reduction against Heroes, Non-Hero units, and Piercing units respectively.
    • However, they deal 50% more attack damage against other Reinforced units.
• The following abilities are not acquirable in any way (e.g. Devour etc.).
• The following units now have the Piercing ability:
  • Ranged Creep and Mega Ranged Creep
  • Serpent Ward
  • Plague Ward
  • Most neutral creeps' with the previous Piercing attack class now has this ability as well.
• The following units now have the Reinforced ability:
  • Siege Creep
  • All buildings
• The following units now have the Runty ability:
  • Melee Creep and Mega Melee Creep
• Eidolon, Treant and Lycan Wolf no longer have the Basic attack class.
• Neutral creeps now all have the standard attack type, and their damage are adjusted so that the net damage is similar.

7.27

• CHANGED
  the Armor formula
  • OLD
    (0.052 × MainArmor)/(0.9 + 0.048 × |MainArmor|)
  • NEW
    (0.06 × MainArmor)/(1 + 0.06 × |MainArmor|)

Mechanics Main Heroes Unit Type (Heroes / Clones / Illusions) Complexity Attributes Table Buyback Level Roles Gold Experience Animations Stats Armor Attributes ( Strength / Agility / Intelligence) / Universal) Health & Mana (HP Regen & MP Regen) Magic Resistance Movement Speed / Slow Resistance Status Resistance Turn Rate Misc Creep Controling Death / Denying Vision Unit Size (Collision Size / Bound Radius / Selection Box / Model Size) Gib Type / Shades Adjectives Buildings Towers / Barracks / Ancient / Fountain Effigy Neutral Buildings (Outposts / Watchers / Twin Gates / Lotus Pools) Abilities Type Active / Passive / Autocast Aura Accuracy / Evasion Channeling Damage Barrier Damage Block Damage Manipulation Damage Over Time Talents Teleport Targeting Area No Target Point Unit Vector Combinations Casting Cast Range / Motion Buffer Cast Animation (Cast Point + Backswing) Cooldown Reduction (Flat / Current Flat / Percentage) Reset Charge-based Runes Bounty Rune Water Rune Wisdom Rune Power Runes ( Amplify Damage Rune / Arcane Rune / Haste Rune / Illusion Rune / Invisibility Rune / Regeneration Rune / Shield Rune) Misc Random Distribution Transformation Attack Damage Attack Damage Instant Attack Heroes Attack Classes Attack Range (Acquisition Range) Attack Speed (BAT / Interval) Damage Types (Physical / Magical / Pure / Instant Kill) Flags (HP Removal / No-reflection / No-Spell-Lifesteal / No-Spell-Amplification) Projectile Speed Spell Damage (Outgoing / Incoming) Modifiers Bash Cleave / Splash Corruption Critical Strike Lifesteal / Spell Lifesteal Mana Break On-hit Effects Misc Damage Instance Animation / Orb Walking Status Effects Disables Cyclone Disabling Orders Forced Movement (Knockback) / Upward Movement Fear (Hypnosis) Hide Hex Root Leash Stun Sleep Taunt Movement Move Speed Slow Flying Movement Phased / Tree Walk / Unobstructed Movement Other Attack Immune / Non-targetable Attack Speed Slow Debuff Immunity Spell Immunity Invulnerability Invisibility Blind Break Disarm Ethereal Silence Mute Trap Dispels Basic Strong Death Items Mechanics Courier Sharing / Selling Disassemble Recipes Neutral Item Drop