Armor

Armor is a type of item which is wearable by the player, i.e. it can be placed into one of the player's armor slots. Typically armor will provide some protection against damage.

Armor

This table shows how many defense points each piece of armor provides, as well as listing any special features of that armor.

Set	Helmet	Chestplate	Leggings	Boots	Full set	Notes	Mod
Leather	1	3	2	1	7	-	Minecraft
Iron	2	6	5	2	15	-	Minecraft
Chain	2	5	4	1	12	-	Minecraft
Gold	2	5	3	1	11	-	Minecraft
Diamond	3	8	6	3	20	-	Minecraft
Apiarist's Clothes	1	3	2	1	7	Reduces Bee effect damage, full set negates all damage from bees.	Forestry
Exo-Suit	0	0	0	0	0	Each piece can hold other armor, which takes damage instead.	Factorization
Steel	2	6	5	2	15	-	Railcraft
Long Fall Boots	-	-	-	3	3	Negates fall damage, infinite durability.	Portal Gun
Invar	2	7	5	2	16	-	Thermal Expansion
Bronze	2	6	5	2	15	-	IndustrialCraft2
Hazmat Suit	1 Refills oxygen bar by using Compressed Air Cells	1	1	1 Reduces fall damage	4	Full set reduces damage taken from lava, fire and raditation.	IndustrialCraft2
Composite Vest	0	9	0	0	9	-	IndustrialCraft2
NanoSuit	3	8	6	3	20	Must be charged to provide protection.	IndustrialCraft2
QuantumSuit	3 Cures negative effects and restores hunger bar	8	6 Increases sprint speed	3 Increases jump height, negates fall damage	20	Must be charged to provide protection. Full set negates all damage.	IndustrialCraft2
Steeleaf Armor	2 Enchanted with Projectile Protection II	7 Enchanted with Blast Protection II	5 Enchanted with Fire Protection II	2 Enchanted with Feather Falling II	16	Some found armor may have different enchantments.	Twilight Forest
Ironwood Armor	2 Enchanted with Aqua Affinity I	7 Enchanted with Protection I	5 Enchanted with Protection I	2 Enchanted with Feather Falling I	16	-	Twilight Forest
Naga Scale Armor	-	7 Enchanted with Fire Protection III	6 Enchanted with Protection III	-	13	Enchantments only apply if the armor is crafted.	Twilight Forest
Knightly Armor	3	8	6	3	20	-	Twilight Forest
Phantom Armor	3	8	-	-	11	-	Twilight Forest
Fiery Armor	4	9	7	4	24	Each piece is enchanted with Fiery Aura II by default.	Twilight Forest
Thaumic Armor	2	6	5	2	15	Highly enchantable	Thaumcraft
Runic Armor	1 Charge of 8	3 Charge of 24	2 Charge of 16	1 Charge of 8	7 charge of 56	Each piece of armor has a charge that takes damage before your health when taking physical, fall, fire, burn, or lava damage. If the shield drops on all items it acts as leather armor. Runic armor can not be enchanted but it can be infused to hardened (iron armor base instead of leather except the legs which only get 4 defense instead of the 5 iron leggings have), Energized (recharges shield 20% faster), augment (increased charge for each piece)	Thaumcraft
Mage Armor	2	6	4	2	14	Highly enchantable, regenerates durability by using wearer's mana, if wearing a full set it increases mana regen and spell effect	Ars Magica 2
BattleMage Armor	3	8	6	3	20	Highly enchantable, slowly regenerates durability by using wearer's mana, if wearing a full set it slightly increases mana regen and spell effect	Ars Magica 2
Earth Armour	0	16	0	0	16	slowly regenerates durability by using wearers mana.	Ars Magica 2
Wooden Armor	1	2	2	1	6	-	Tinkers' Construct
Exo Armor	5	5	5	5	20	*Armor is customizable so stats depicted as full defense, the armor has no defense value unmodified, It should also be noted that unlike Tinkers' Construct tools the armor is fully enchantable in a vanilla anvil.	Tinkers' Construct
Amethyst Armor	6	12	10	6	34	While this armor has more than 25 points of protection only the first 25 points matter.	Biomes O' Plenty
Adaminite Armor	5	10	6	4	25	-	Thaumic Additions

Mechanical Explanation

Each point of defense absorbs 4% of damage. For example diamond armor with 20 defense absorbs 80% of damage after enchant reductions. It should also be noted that While using Tinkers' construct Head and Feet with Twilight Forest Fiery Armor chest and legs allows for 26 defense it does not provide 104% (read 100%) damage reduction and full immunity to damage. There is an armor defense cap of 24 allowing a max damage reduction of 94% from armor defense applied after enchant reductions. Protection Enchants can also reduce damage up to 80% based on Level of enchant and a random modifier (the modifier is from 50 to 100% of the possible 80%, so max enchant provides 40-80% deflection randomly), Then armor reduces the remaining 20% (best case) by up to 94%possibly reducing damage to 1.2%. Due to minecraft damage calculations any damage reduced below 1 can round up or down causing 1 or 0 points of damage. This means that even if you have the best armor, highest enchants, get the best enchant roll, if you get an unlucky rounding roll on the last 1.2% you will still take 1/2 heart of damage, even if the base attack was 1 point of damage and the damage you should receive would be .012 meaning there is always a chance to damage another player or be damaged by a hit. There are armors that redirect the last bit of damage, such as the QuantumSuit which basically takes the damage as energy loss, Thaumcraft 4 runic armor which sometimes offloads damage to a "runic shield", and a number of others. These armors will prevent actual damage to players health but most have a cost of some kind meaning they are only immune to damage until they can no longer pay the cost. For example when the QuantumSuit runs out of power.

Durability

This table shows the durability of each piece of armor.

Set	Helmet	Chestplate	Leggings	Boots
Leather	55	80	75	65
Iron	165	240	225	195
Chain	165	240	225	195
Gold	77	112	105	91
Diamond	363	528	495	429
Apiarist's Clothes	100	100	100	100
Exo-Suit	infinite	infinite	infinite	infinite
Steel	275	400	375	325
Long Fall Boots	-	-	-	infinite
Invar	275	400	375	325
Bronze	165	240	225	195
Hazmat Suit	infinite	infinite	infinite	infinite
Composite Vest	-	800	-	-
NanoSuit	infinite	infinite	infinite	infinite
QuantumSuit	infinite	infinite	infinite	infinite
Steeleaf Armor	220	320	300	260
Ironwood Armor	220	320	300	260
Naga Scale Armor	-	335	315	-
Knightly Armor	220	320	300	260
Phantom Armor	330	480	-	-
Fiery Armor	275	400	375	325
Thaumic Armor	275	400	375	325
Wooden Armor	23	33	31	27
Adaminite Armor	509928	741713	695356	602642