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Catches fire from lava


Information icon.svg
This feature is exclusive to Java Edition, Bedrock Edition and PlayStation 4 Edition. 

A composter is a block that converts food and plant material into bone meal. It also serves as a farmer's job site block.


Block Composter
Hardness 0.75
Tool Axe
Breaking time[note 1]
Hand 1.3
Wood 0.85
Stone 0.6
Iron 0.45
Diamond 0.3
Gold 0.2
  1. Times are for unenchanted tools in seconds.


Name Ingredients Crafting recipe Description
Composter Any wood Fence +
Any Planks

[Java Edition only]
Composter Any wood Slab

[Bedrock and PlayStation 4 editions only]

Natural generation

Composters can generate in farms in villages.


Composters can be used to recycle food and plant items, except bamboo and meat, into bone meal. To do so, the player must use any of a selection of items on the composter. When an adjacent comparator is facing away from the composter, a comparator signal strength of up to 8 is emitted depending on the fullness of the block.

Composters appear to have an empty interior. As such, entities can enter and exit a composter through the top, but not the sides or bottom. The composter has a “floor”, whose height depends on the fullness. When the composter is completely empty, this floor is slightly above the block below, and when it is completely full, there is a slight dip on top. When the composter’s fullness increases, any entities inside will be pushed up accordingly.


The composter can be filled with compost, which is done by adding compostable items to it. When successfully adding an item, a green particle appears. The table below lists supported items, which have different levels of compost-ability. The higher the percentage of an item, the more likely it is for it to add another layer of compost. Each layer of compost has a podzol-like appearance. When the composter reaches the 7th layer of compost, the compost changes appearance indicating that bone meal can be collected by using the composter a final time.

The following table shows the items that can be used in a composter, the percent chance for an item to add a level of compost, and the average number of items needed to fill a composter:

30% 50% 65% 85% 100%
Average number of items required to fill a composter
≈23.33 14 ≈10.77 ≈8.24 7


Composters can interact with hoppers. A hopper directly below a composter will pull bone meal from it. A hopper directly above a composter will push items into it. See Hopper § Redstone component for more details.

Hoppers cannot interact with the sides of a composter.

Changing villager profession

If a village has a composter that has not been claimed by a villager, any resident villager who has not already chosen a job site block has a chance to change their profession to farmer.

Redstone component

See also: Redstone circuit

A composter can act as a power source for a redstone comparator. With a composter behind it (either directly, or separated by an unpowered solid block), a comparator outputs a signal strength proportional to how full the composter is: 0 for empty, 1 for one-seventh full, 2 for two-sevenths full, 3 for three-sevenths full, 4 for four-sevenths full, 5 for five-sevenths full, 6 for six-sevenths full, 7 for completely full but the bone meal is not ready to collect, 8 for completely full and the bone meal is ready to collect. However, if there is a block between the composter and comparator, the comparator does not immediately update.


A composter can be used as fuel in a furnace to smelt 1.5 items.


Sound Subtitle Namespaced ID Subtitle ID Source Pitch Volume Min. volume
No subtitle block.composter.empty (Plays when emptying a composter) ? ? ? ?
No subtitle block.composter.fill (Plays when adding to a composter) ? ? ? ?
No subtitle block.composter.fill_success (Plays when successfully adding to a composter) ? ? ? ?
No subtitle block.composter.ready (Plays when composting completes) ? ? ? ?

Data values

Block states

Composter (compost level 0 Xray).pngComposter (compost level 1 Xray).pngComposter (compost level 2 Xray).pngComposter (compost level 3 Xray).pngComposter (compost level 4 Xray).pngComposter (compost level 5 Xray).pngComposter (compost level 6 Xray).pngComposter (compost level 7 Xray).pngComposter (compost level 8 Xray).png
Composter with different compost levels
Name Default value Allowed values Description
level‌[JE only]
composter_fill_level‌[BE only]
When at level 8, bone meal is able to be collected from the composter.


Java Edition
1.1419w03aAdded composters.
19w03bAll mushroom blocks can now be used in composters.
19w04aComposters now spawn in village farms.
19w05aChances changed from 10/20/50/80/100% to 30/50/65/85/100%.
Bedrock Edition
1.10.0beta composters, which are available only through Experimental Gameplay with a different crafting recipe.
1.11.0beta composter functionality.
beta now support hopper placement.
PlayStation 4 Edition
1.91Added composters.


Issues relating to "Composter" are maintained on the bug tracker. Report issues there.


  • Using individual wheat items to fill a composter is much more efficient than using hay bales. The chance of getting the composter's level increased by at least one using 9 wheat items is ≈99,92%, and the number of levels increased can be anywhere from 1 to 9. Using a hay bale, there can be only two possibilities: increase composter's level by 1 (85%) or nothing happens (15%).