REDSTONEPEDIA › Farms › Iron farm
Middle-ground iron farm (the most iron for an evening's build)
1,800 iron an hour · 1,836 blocks · 1.0 an hour per block · 86 iron to build · four farms around one kill chamber
Villagers scared by a zombie summon iron golems; the farm kills them and collects their iron in a chest.
1,834 iron an hour on a rainy day, 1,774 in a thunderstorm. Nether quartz: 12; iron: 86. Fits in 16 chunk columns: 56×34×56. Restarts by itself when you come back after days away. Its storage holds 11 hours of iron.
1,834 iron an hour from a 107-minute build
1,800 iron an hourIron farm3D view loading (or not available in this browser)
Try it
Press play to watch it work: the villagers sleep at night and panic at the zombie by day, golems spawn and die, and the hoppers carry their iron to the chest; the top right counts the game's time, the golems and the iron. The magenta floor is where a golem can spawn, seen through the blocks (Spawn spots hides it). The chest tagged OUT collects the first copy's iron; every copy has its own chest under its last hopper. In the game, build it and wait near it.
How this design does it: Four farms around one kill chamber, 21 blocks from its centre: each farm's golems fall into a fenced water channel deep below every farm's sight; the four channels meet in the middle under one lava blade; a hopper line fills a row of six double chests under it, one after the other (8 hours).
Build it
Download .litematic Download the design as text
The .litematic opens in Litematica (Minecraft 26.3): every block of the design in one region. The text file is the same build written as plain text, block by block.
Pour in the water and the lava (16 bucketfuls) where the view shows them.
Blocks used: chest cobblestone cobblestone slab comparator hopper lava oak boat oak fence oak fence gate oak trapdoor observer red bed redstone wire repeater villager water
What it is made of
Each part of this farm, what it takes to build, and the version of it this farm uses: follow a part to see its other versions side by side.
| part | this farm's | blocks placed | blocks dug | build time |
|---|---|---|---|---|
| Villager cage | its own · other versions | 268 | 0 | 33 min |
| Sleep trigger | its own · other versions | 100 | 0 | 11 min |
| Golem spawn area | its own · other versions | 536 | 0 | 19 min |
| Golem drop | its own · other versions | 745 | 0 | 24 min |
| Kill chamber | its own · other versions | 140 | 0 | 6 min |
| Collection | its own · other versions | 8 | 0 | 5 min |
| Storage | its own · other versions | 19 | 0 | 9 min |
| The whole farm | 1,816 | 0 | 1 h 47 min |
Details: how it works, measurements and properties
In depth
villagers scared by a zombie summon iron golems; the farm kills them and collects their iron in a chest
How to try it
Press play to run the farm. The villagers sleep in their beds at night and panic at the zombie by day, golems spawn, fall and die in the lava, and the hoppers carry their iron and poppies to the chest. The chest tagged OUT collects the first copy's iron; every copy has its own chest under its last hopper. The top right shows the game's time, the golems so far and the iron in the chest; the speed menu plays it faster or slower. Drag to look around, pinch or scroll to zoom.
Measurements
On Hard, through rain, thunder and lightning.
| metric | value | what it means |
|---|---|---|
| iron per hour per block | 1.00 | iron ingots an hour for each block you place |
| iron per hour | 1,834 | iron ingots an hour |
| iron range | 95% 1825-1844 | the range its rate falls in, 95% sure |
| golems per hour | 460.3 | iron golems an hour |
| seconds per golem | 7.8 | the time between two golems |
| share of ceiling | 96% | how close it comes to the game's limit: one golem every 30 seconds for each group of villagers |
| modules | 4 | groups of villagers that each summon golems on their own |
| iron per hour per module | 459 | iron ingots an hour for each group of villagers |
| kill | 25.8 s | how long a golem lives before the farm kills it, at the longest |
| kill tail | the longest 31.4 s: no golem outlived 1 min in 49,103 golems (95% bound 0.01% a golem) | |
| golems at the zombie | 8 of 49,103 golems targeted the farm's zombie | |
| neighbour sightings | 2,065 of 49,103 golems sensed by another group (2,077 sensings, 0.04 a golem) | |
| lips | none (no golem stands dry beside a current) | |
| restarts after a missed night | yes | whether it starts again by itself after a night its villagers could not sleep (rain at dusk, a storm, you away) |
| restarts after days away | yes (unloaded or not ticking | whether it starts again by itself when you come back after days away |
| back | by day or at night: the first golem 0.0-0.1 h after the return) | |
| rain | clear day 1,848 iron/h; rain day 1,834 iron/h; thunder day 1,774 iron/h | iron an hour on a clear day, a rainy day and a stormy day |
| lightning | about 0.00036 iron lost per thunderstorm; villagers turned into witches about every 374 game days (one strike can take up to 4); the zombie's boat broken about every 3,322 game days; a fire that can reach the farm (its flammable blocks or mobs or drop path) about every 521 game days; site note: a fire on the site that cannot reach the farm never; AFK spot struck: never (a 7 x 7 opaque non-flammable roof over the player's column with its block 4 above the player's feet prevents it: a single block over its column does not); no natural flammable block lies on a fire's way to the farm; a skeleton trap horse on the farm about every 1,568 game days (every 22 game days of thunder; a lightning rod topping its column within 128 blocks prevents it); a skeleton trap horse that triggers (within 10 blocks of the AFK spot) never (a lightning rod within 128 blocks topping its column takes the bolts: none then); the farm breaks in about 206 game days (a villager made a witch first); thunderstorms 1.4% of the time (5 min 10.55 s each on average) | what thunderstorms cost: the iron a strike burns, and how often a strike turns a villager into a witch, breaks the zombie's boat or starts a fire |
| thunder loss | 311.7 | iron lost for each hour of thunder |
| sunburn | never (the zombie never sees the sky) | whether the zombie can burn in daylight |
| fire | never | whether the lava can set the farm on fire |
| bill | 86 iron, 12 quartz, 16 villagers, 16 beds, 4 zombies | what it costs in survival: iron (hoppers, the bucket and every tool you need), quartz, villagers, beds |
| payback | 3 min | how long the farm takes to make back the iron it cost |
| build time | 107 min at middle prices (1,816 placed, 0 dug, 1 lava trips, 16 villagers moved) | about how long the build takes: placing and digging its blocks, fetching the lava, moving the villagers in |
| time to an iron kit | 108 min (the build | about how long from starting the build to a full set of iron armour (24 iron), its own iron counted |
| then | 24 iron at the card's rate | |
| then | the trip to the chest) | |
| build minutes | 106.8 | |
| t kit minutes | 107.6 | |
| collecting | 3 s per trip to the chest (2 x its depth, 3 layers | |
| at | the access's speed) | |
| iron per hour sleeping | 1,837 | |
| volume per module | 26,656 | |
| entities alive | 27.5 | |
| entities peak | 32 | |
| tools | bucket 3 + iron pickaxe 3 | the tools you need and the iron each one costs: a bucket for lava and water, shears for leaves, an iron pickaxe for redstone dust |
| lava sources | 16 | lava source blocks to bring: one bucket trip each |
| materials | Nether: quartz in 12 blocks | the stage of the game its materials need: day 1, the Nether (quartz, slime, magma...) or the End |
| chunk columns | 16 | how many 16 x 16 chunk columns it covers |
| storage | 10.5 h (377 slots; 456 poppies/h) | how long its chests and hoppers hold the iron and poppies before they fill |
| hoppers per 1000 iron/h | 8.7 | hoppers for each 1000 iron an hour: each hopper costs the server a little work every tick |
| redstone dust | 144 | the redstone dust its blocks take to craft (a repeater or a comparator 3, an observer 2, a piston 1...): redstone ore needs an iron pickaxe to mine |
Notes from its designer
Four farms around one kill chamber, 21 blocks from its centre: each farm's golems fall into a fenced water channel deep below every farm's sight; the four channels meet in the middle under one lava blade; a hopper line fills a row of six double chests under it, one after the other (8 hours).
Properties
| Study | Mob farms |
|---|---|
| Kind | Middle-ground iron farm (the most iron for an evening's build) |
| Blocks placed | 1836 |
| Box | 56×34×56 (106624 blocks of space) |
| Inputs / outputs | no input / OUT |
| Flags | variation |
| Design file | cross-4 |
The design file
Design file (2037 lines)
# Iron farm: 1,800 iron an hour · 1,836 blocks · 1.0 an hour per block · 86 iron to build · four farms around one kill chamber
# https://vjeux.github.io/redstonepedia/farms/iron/cross-4.html
# CIRCUIT: seconds per golem 7.8
name: iron-cross-4x21
circuit: mob-farm iron_ingot
ground: -26
how: farms around one kill chamber
parts: hide off-delay-ring-L24 + a repeater
restart: yes
port output: 3 -29 22
entity: minecraft:villager 0.5 0.5625 0.5
entity: minecraft:villager 2.5 0.5625 0.5
entity: minecraft:villager 4.5 0.5625 0.5
entity: minecraft:villager -1.5 0.5625 0.5
entity: minecraft:oak_boat 2.5 0.5 -6.8 {Passengers:[{id:"minecraft:zombie"}]}
entity: minecraft:villager 23.5 0.5625 18.5 {Rotation:[90.0f,0.0f]}
entity: minecraft:villager 23.5 0.5625 20.5 {Rotation:[90.0f,0.0f]}
entity: minecraft:villager 23.5 0.5625 22.5 {Rotation:[90.0f,0.0f]}
entity: minecraft:villager 23.5 0.5625 16.5 {Rotation:[90.0f,0.0f]}
entity: minecraft:oak_boat 30.8 0.5 20.5 {Rotation:[90.0f,0.0f],Passengers:[{id:"minecraft:zombie"}]}
entity: minecraft:villager 5.5 0.5625 41.5 {Rotation:[180.0f,0.0f]}
entity: minecraft:villager 3.5 0.5625 41.5 {Rotation:[180.0f,0.0f]}
entity: minecraft:villager 1.5 0.5625 41.5 {Rotation:[180.0f,0.0f]}
entity: minecraft:villager 7.5 0.5625 41.5 {Rotation:[180.0f,0.0f]}
entity: minecraft:oak_boat 3.5 0.5 48.8 {Rotation:[180.0f,0.0f],Passengers:[{id:"minecraft:zombie"}]}
entity: minecraft:villager -17.5 0.5625 23.5 {Rotation:[270.0f,0.0f]}
entity: minecraft:villager -17.5 0.5625 21.5 {Rotation:[270.0f,0.0f]}
entity: minecraft:villager -17.5 0.5625 19.5 {Rotation:[270.0f,0.0f]}
entity: minecraft:villager -17.5 0.5625 25.5 {Rotation:[270.0f,0.0f]}
entity: minecraft:oak_boat -24.8 0.5 21.5 {Rotation:[270.0f,0.0f],Passengers:[{id:"minecraft:zombie"}]}
origin: -25 0 -7
palette:
$ minecraft:repeater[delay=2,facing=north,locked=false,powered=false]
% minecraft:repeater[delay=2,facing=south,locked=false,powered=false]
& minecraft:repeater[delay=2,facing=west,locked=false,powered=false]
* minecraft:water[level=0]
0 minecraft:redstone_wire[east=none,north=side,power=0,south=side,west=none]
1 minecraft:redstone_wire[east=side,north=none,power=0,south=none,west=none]
2 minecraft:redstone_wire[east=side,north=none,power=0,south=none,west=side]
3 minecraft:redstone_wire[east=side,north=none,power=0,south=side,west=none]
4 minecraft:redstone_wire[east=side,north=side,power=0,south=none,west=none]
5 minecraft:redstone_wire[east=side,north=side,power=0,south=side,west=side]
6 minecraft:repeater[delay=1,facing=east,locked=false,powered=false]
7 minecraft:repeater[delay=1,facing=north,locked=false,powered=false]
8 minecraft:repeater[delay=1,facing=south,locked=false,powered=false]
9 minecraft:repeater[delay=1,facing=west,locked=false,powered=false]
@ minecraft:repeater[delay=2,facing=east,locked=false,powered=false]
A minecraft:chest[facing=east,type=single,waterlogged=false]
B minecraft:cobblestone
C minecraft:chest[facing=east,type=left,waterlogged=false]
D minecraft:cobblestone_slab[type=bottom,waterlogged=false]
E minecraft:comparator[facing=east,mode=compare,powered=false]
F minecraft:comparator[facing=north,mode=compare,powered=false]
G minecraft:comparator[facing=south,mode=compare,powered=false]
H minecraft:comparator[facing=west,mode=compare,powered=false]
I minecraft:hopper[enabled=true,facing=east]
J minecraft:hopper[enabled=true,facing=south]
K minecraft:oak_fence[east=false,north=false,south=true,waterlogged=false,west=true]
L minecraft:lava[level=0]
M minecraft:oak_fence[east=false,north=true,south=false,waterlogged=false,west=false]
N minecraft:oak_fence[east=false,north=true,south=false,waterlogged=false,west=true]
O minecraft:oak_fence[east=false,north=false,south=false,waterlogged=false,west=true]
P minecraft:oak_fence[east=false,north=true,south=true,waterlogged=false,west=false]
Q minecraft:oak_fence[east=true,north=false,south=false,waterlogged=false,west=false]
R minecraft:oak_fence[east=true,north=false,south=false,waterlogged=false,west=true]
S minecraft:oak_fence[east=true,north=false,south=true,waterlogged=false,west=false]
T minecraft:oak_fence[east=true,north=true,south=false,waterlogged=false,west=false]
U minecraft:oak_fence_gate[facing=east,in_wall=false,open=true,powered=false]
V minecraft:oak_fence_gate[facing=north,in_wall=false,open=true,powered=false]
W minecraft:oak_fence_gate[facing=south,in_wall=false,open=true,powered=false]
X minecraft:oak_fence_gate[facing=west,in_wall=false,open=true,powered=false]
Y minecraft:oak_trapdoor[facing=east,half=bottom,open=false,powered=false,waterlogged=false]
Z minecraft:oak_trapdoor[facing=east,half=bottom,open=true,powered=false,waterlogged=false]
a minecraft:oak_trapdoor[facing=north,half=bottom,open=false,powered=false,waterlogged=false]
b minecraft:oak_trapdoor[facing=north,half=bottom,open=true,powered=false,waterlogged=false]
c minecraft:chest[facing=east,type=right,waterlogged=false]
d minecraft:oak_trapdoor[facing=south,half=bottom,open=false,powered=false,waterlogged=false]
e minecraft:oak_trapdoor[facing=south,half=bottom,open=true,powered=false,waterlogged=false]
f minecraft:oak_trapdoor[facing=west,half=bottom,open=false,powered=false,waterlogged=false]
g minecraft:oak_trapdoor[facing=west,half=bottom,open=true,powered=false,waterlogged=false]
h minecraft:hopper[enabled=true,facing=down]
i minecraft:observer[facing=east,powered=false]
j minecraft:observer[facing=north,powered=false]
k minecraft:observer[facing=south,powered=false]
l minecraft:observer[facing=west,powered=false]
m minecraft:red_bed[facing=east,occupied=false,part=head]
n minecraft:red_bed[facing=north,occupied=false,part=foot]
o minecraft:oak_fence[east=false,north=false,south=true,waterlogged=false,west=false]
p minecraft:red_bed[facing=north,occupied=false,part=head]
q minecraft:red_bed[facing=south,occupied=false,part=foot]
r minecraft:red_bed[facing=east,occupied=false,part=foot]
s minecraft:red_bed[facing=south,occupied=false,part=head]
t minecraft:red_bed[facing=west,occupied=false,part=foot]
u minecraft:red_bed[facing=west,occupied=false,part=head]
v minecraft:redstone_wire[east=none,north=none,power=0,south=none,west=side]
w minecraft:redstone_wire[east=none,north=none,power=0,south=side,west=none]
x minecraft:redstone_wire[east=none,north=none,power=0,south=side,west=side]
y minecraft:redstone_wire[east=none,north=side,power=0,south=none,west=none]
z minecraft:redstone_wire[east=none,north=side,power=0,south=none,west=side]
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layer -7:
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layer -1:
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layer 0:
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layer 3:
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