To make a mob farm in Minecraft, you build a dark spawning room high above a collection point, where mobs appear, fall through a 22-block drop well, and land weakened at the grinder so you can kill them for XP and item drops. This simple canal-style design automatically funnels hostile mobs into a central killing zone, letting you ramp up your XP efficiently without hunting at night.
How to make a mob farm in Minecraft: A concise introduction.
How to make a mob farm in Minecraft: A concise introduction explaining the purpose of a mob farm for XP and items, and a simple list of required materials without crafting steps
A mob farm is a structure that automatically spawns hostile mobs in a dark room, channels them into a controlled drop, and lets you kill them safely for experience orbs and drops like gunpowder, bones, and string. Unlike waiting for nighttime encounters, a well-built farm produces a steady stream of weakened enemies you can dispatch with one or two hits. For this build, you need these items ready:
- 4 chests
- 4 hoppers
- 4 slabs (any type)
- At least 25 stacks (1600 units) of cobblestone or any solid block
- 1 stack (64 units) of trapdoors
- 2 water buckets
- Torches (optional)
- Scaffolding (optional)
Build the mob grinder base
The grinder is where items are collected and you deliver the final blow to weakened mobs. Follow these steps:
- Dig a hole two blocks wide and two blocks long, one layer deep.
- Place the four chests inside the hole so they all face the same direction; this creates two large chests.
- Position the four hoppers on top of the chests, forming a square.
- Place the four slabs on top of the hoppers. The grinder base is complete.
Construct the 22-block drop well
This tall hollow square weakens mobs without killing them, so you earn the XP. Build the well directly around the grinder:
- Place a cobblestone block next to one of the slabs, then stack another on top. Remove the first block so the second appears floating.
- Using that floating block as a corner, build a square base around the grinder that is wider than the grinder itself.
- Stack the walls to a total height of 22 blocks. An easy method: build one column to 22 blocks, then use it as a marker to complete the rest of the walls.
Create the spawning room and water trenches
The spawning room is a dark, enclosed space where mobs appear and water currents push them into the drop well.
- At the top of the well, build a platform two blocks wide and eight blocks long on each side of the well, using the same solid blocks.
- Add walls two blocks high around the edges of each platform to form four trenches leading to the well.
- Build the spawning room floor: start at one corner, place a row of blocks spanning the length of the adjacent trench, then another row from the edge of the next trench until they meet. Fill the gap in the middle to form a solid platform. Repeat for all four corners.
- Build a wall two blocks high around the entire spawning room floor.
- Fill all four trenches with water buckets, pouring at the ends so the water flows inward but does not spill down into the well.
- Place trapdoors over the trenches (16 trapdoors per trench side, using all 64). Open the trapdoors so mobs fall into the water and through the well.
- Build a roof one block higher than the walls to fully enclose the room.
- Stand on the roof and place torches across the entire area to prevent mobs from spawning on top of the roof at night.
Set up the AFK room for maximum efficiency
Your AFK spot must be within the correct range to allow mobs to spawn in the farm while preventing spawns elsewhere. Verified facts confirm that mobs will not spawn within a 24-block spherical radius of the player, and natural mob spawning occurs within a 128-block spherical radius. Mobs more than 32 blocks away will not move and can despawn. To maximize spawn rates within the farm, all other potential mob spawning locations (e.g., caves) within the 128-block radius of the player's AFK spot should be lit up.
- Select scaffolding in your hotbar and pick a spot in the middle of the mob farm roof.
- Stack scaffolding about 80 blocks high.
- Build a small room around the top scaffolding. Use glass blocks or similar transparent materials because opaque blocks lower mob spawning rates.
This AFK position keeps you between 24 and 128 blocks from the spawning room, ensuring mobs appear and fall while you wait. For the best results, light up any caves or dark areas within 128 blocks of your AFK spot so the farm is the only valid spawn location. Many players also consult mobile app guides for visual references when lighting caves efficiently.
How to collect XP and items from your farm
- Wait in the AFK room for about five minutes, giving mobs time to spawn, fall, and accumulate at the grinder.
- Climb down the scaffolding to ground level. You will see weakened mobs stuck at the base of the well.
- Select a weapon from your hotbar and attack each mob once or twice to kill it. You gain XP and collect the dropped items from the chests.
- Return to the AFK room and wait for another batch of mobs to be trapped in the farm, then repeat the cycle.
Frequently Asked Questions
How high does a mob farm need to be?
A 22-block drop height is ideal. Most common mobs (creepers, zombies, skeletons) die from a fall of 23.5 blocks, but you want them weakened, not dead, so you can kill them yourself and earn the XP. A 22-block drop lowers their health significantly without killing them.
What is the best mob to farm in Minecraft?
Endermen are the best mobs to farm. They grant large amounts of XP per kill and drop ender pearls, which are valuable for crafting Eyes of Ender and accessing the End.
How far away should you AFK from a mob farm?
For a spawning-based mob farm like this one, you must AFK at least 24 blocks from the spawning room but no more than 128 blocks. Mobs only appear when they are at least 24 blocks away from you, and they despawn automatically if you are more than 128 blocks away. Staying within this range ensures the farm operates continuously.
