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Item repair

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An example of item repair.

Item repair is a feature that allows players to repair damaged tools, armor, or other items with durability by combining them in the crafting grid or a grindstone.

Usage[edit]

Two items of the same type and material can be placed anywhere on the crafting grid or grindstone, which result in a single repaired item. The durability of the repaired item equals the sum of the old items' durability plus a 'repair bonus' of 5% of the item's maximum uses, up to a limit of the maximum durability for that item. Repairing gives a slight benefit in conserving inventory space, as it combines two non-stackable objects into one.[1]

The repaired object is never enchanted even if both items were to have the exact same enchantments, with the exception of curse enchantments, which are transferred to the repaired item. Therefore, using a "junk" item in a repair may sometimes be useful for removing an unwanted enchantment from an item prior to enchanting it again. Tools made of different materials (for example, a wood and a stone pickaxe) cannot be combined.

Formula for uses restored[edit]

The formula for determining how many uses a repaired item can have restored to it in the crafting box, is as follows:

min( Item A uses + Item B uses + floor(Max uses / 20), Max uses)

where "floor" means round down to the smaller integer, and "min(x,y)" means the smallest of x or y.

Example: Two stone axes have 10 and 45 uses. A newly crafted stone axe would have 132 uses.

10 + 45 + 132/20 = 55 + 6.6 = 61

Or, in terms of percentage (approximated):

7.5% + 34% + 5% = 46.5%

Thus, the greatest benefit is gained when the two items have a combined durability of at most approximately 95%. You can combine 47.5% + 47.5%, 94% + 1%, 10% + 10% or any other values that total 95% or less. The order in which items are combined does not matter; one sequence of repairs gives exactly the same durability as any other.

However, note in the example, repairing a stone tool restores a bonus of 6 durability, which is actually only 6/132 = 4.5%. The precise combined durability for efficient repairs is shown in the following table.

Item Actual bonus (%) Actual bonus (uses) Combined durability (%) Combined durability (uses)
Golden tools 3.0% 1 97.0% 32
Wooden tools 5.0% 3 95.0% 57
Stone tools 4.5% 6 95.5% 126
Iron tools 4.8% 12 95.2% 239
Diamond tools 5.0% 78 95.0% 1484
Carrot on a stick 3.8% 1 96.2% 25
Flint and steel 4.6% 3 95.4% 62
Fishing rod 4.6% 3 95.4% 62
Shears 4.6% 11 95.4% 228
Bow 4.9% 19 95.1% 366

A good strategy is to wear down two items until both have less than 95% combined durability remaining. If the resulting repaired item still has a damage bar, then the item has gained the full 5% repair bonus for combining those two items, otherwise some of the repair bonus was likely lost. A perfect repair is theoretically possible, but unlikely in practice. Combining items whose combined durability is more than 100% actually wastes more resources than simply using tools until they break.

The precise combined durability for efficient repairs for all types of armor is shown in the following table.

Armor piece Actual bonus (%) Actual bonus (uses) Combined durability (%) Combined durability (uses)
Leather helmet 3.6% 2 96.4% 53
Leather boots 4.6% 3 95.4% 59
Leather leggings 4.0% 3 96.0% 72
Leather chestplate 4.9% 4 95.1% 77
Gold helmet 3.9% 3 96.1% 74
Gold boots 4.4% 4 95.6% 87
Gold leggings 4.8% 5 95.2% 100
Gold chestplate 4.4% 5 95.6% 108
Iron helmet 4.8% 8 95.2% 157
Iron boots 4.6% 9 95.4% 186
Iron leggings 4.9% 11 95.1% 214
Iron chestplate 5.0% 12 95.0% 229
Diamond helmet 5.0% 18 95.0% 327
Diamond boots 4.9% 21 95.1% 408
Diamond leggings 4.8% 24 95.2% 471
Diamond chestplate 4.9% 26 95.1% 502

Anvil Repair[edit]

An anvil can also repair items in two different ways. This costs experience levels, but unlike the grindstone, the anvil preserves or can even enhance the target's enchantments. The anvil can combine the enchantments on two similar items, or rename any item (not just the ones it can repair). The costs are complex, so a summary is given here.

The repair cost is stored in a repairCost value.

Combination[edit]

Two items of the same type are put into the input slots, the first one is the item to be repaired and the second one is to be merged into the first. The second item's durability is added to the first, and if applicable, some or all enchantments from the second item are added.

Unit repair[edit]

Some items can be repaired by "covering" the damages with a specific material. The item to be repaired is put into the first input slot, and the corresponding material is put into the second slot. Each material item (unit) heals the item's durability by 25% its maximum durability, rounded down.

Repairable items


Anything not listed below does not have a unit repair item, and can only be repaired by consuming another instance of itself.

Item Material
Wooden Sword

Wooden Pickaxe

Wooden Axe

Wooden Shovel

Wooden Hoe

Shield

Planks
Leather Cap

Leather Tunic

Leather Pants

Leather Boots

Leather
Stone Sword

Stone Pickaxe

Stone Axe

Stone Shovel

Stone Hoe

Cobblestone

Blackstone[Java Edition only][2]

Iron Helmet

Iron Chestplate

Iron Leggings

Iron Boots

Chainmail Helmet

Chainmail Chestplate

Chainmail Leggings

Chainmail Boots

Iron Sword

Iron Pickaxe

Iron Axe

Iron Shovel

Iron Hoe

Iron Ingot
Golden Helmet

Golden Chestplate

Golden Leggings

Golden Boots

Golden Sword

Golden Pickaxe

Golden Axe

Golden Shovel

Golden Hoe

Gold Ingot
Diamond Helmet

Diamond Chestplate

Diamond Leggings

Diamond Boots

Diamond Sword

Diamond Pickaxe

Diamond Axe

Diamond Shovel

Diamond Hoe

Diamond
Netherite Helmet

Netherite Chestplate

Netherite Leggings

Netherite Boots

Netherite Sword

Netherite Pickaxe

Netherite Axe

Netherite Shovel

Netherite Hoe

Netherite Ingot
Turtle Shell Scute
Elytra Phantom Membrane

Video[edit]

History[edit]

Java Edition
1.0.0September 27, 2011Notch teased that the upcoming prerelease would have item repairing via crafting table,[3][4][5] and that he had discarded the idea of a dedicated "repair table".[6]
Beta 1.9 Prerelease 2Added the capability to repair items.
1.4.2?Bonus for (traditional) item repairing is reduced to 5%. Prior this update, this bonus was 10% of the max durability.
12w41aAdded the anvil. The original item repair system is unchanged.
1.1418w48aItem repair is now done with the grindstone.
1.14.3Pre-Release 3Item repair can now be done with the crafting grid again in addition to the grindstone.
Pocket Edition Alpha
0.12.1build 1Added the capability to repair items and added the anvil.
Pocket Edition
1.0.0alpha 0.17.0.1Added the capability to repair items in crafting grid and crafting table using classic ui.
Bedrock Edition
1.11.0beta 1.11.0.1Items can now be repaired in grindstone.
Legacy Console Edition
TU7CU11.0Patch 1Added the capability to repair items.
TU151.05Changed repairing tools in the inventory to allow only tools that are not enchanted (because enchantments are lost). This is different to the Java Edition, where repairing enchanted tools in the inventory is possible and results in the loss of the enchantment.

Trivia[edit]

  • Working on an anvil doesn’t remove enchantments to items but they can be removed by repairing on a crafting grid and grindstone.

Gallery[edit]

References[edit]