Calculator
Slime Chunk Finder
Type a world seed to see the slime chunks around you, the nearest ones and the best spot to wait for a slime farm.
- Type your world seed (/seed shows it)
- Type your X and Z from the F3 screen
- Green squares are slime chunks: tap one
The number /seed shows, or what was typed when the world was made: the game turns words into a number.
Your position (F3 screen)
Slime chunks around you
Example world, seed 12345. Type your own seed to see your world.
North
- Slime chunk
- You
- 128 blocks: slimes farther away vanish
- 24 blocks: nothing spawns closer to you
Tap a chunk to see its blocks.
- Slime chunks wholly within 128 blocks across
- 17
Nearest slime chunks
- X 0 to 15, Z -32 to -17 - 16 blocks away
- X -32 to -17, Z 16 to 31 - 23 blocks away
- X -16 to -1, Z 32 to 47 - 32 blocks away
- X -64 to -49, Z 0 to 15 - 48 blocks away
- X 48 to 63, Z 0 to 15 - 48 blocks away
Best spot to wait nearby
Stand at -136 40: 28 slime chunks wholly within 128 blocks.
In a slime chunk, slimes spawn below Y 40 in any light, except in Deep Dark, Mushroom Fields. The game counts the 24 and 128 blocks in every direction, height included.
Slimes in swamps by moon phase
| 1 | Full moon | 50% |
| 2 | Waning gibbous | 37.5% |
| 3 | Third quarter | 25% |
| 4 | Waning crescent | 12.5% |
| 5 | New moon | 0% |
| 6 | Waxing crescent | 12.5% |
| 7 | First quarter | 25% |
| 8 | Waxing gibbous | 37.5% |
Where slimes spawn
| Slime chunks, in every Overworld biome but Deep Dark and Mushroom Fields | Below Y 40 | Any light |
| Swamp, Mangrove Swamp | Y 51 to 69 | Light (block or sky, whichever is higher) at most a random 0 to 7 |
How the game works it out
| Slime chunk | One chunk in ten, picked from the world seed and the chunk's position; the same seed always gives the same chunks |
| Spawn attempts | In a slime chunk only one spawn attempt in ten goes ahead, below Y 40, in any light |
| Biomes | Deep Dark and Mushroom Fields spawn no slimes, slime chunk or not |
| Swamps | Swamp and Mangrove Swamp also spawn slimes from Y 51 to 69, more often near a full moon and never at a new moon; the moon cycle is 8 nights |
| Distance | Nothing spawns within 24 blocks of a player; slimes more than 128 blocks from every player vanish at once |
| Peaceful | No slimes spawn in Peaceful difficulty |
| Text seeds | A seed typed as words becomes a number the way the game reads it; /seed shows that number |
| Checked against the game | The finder gives the same slime chunks as the game for 49 seeds and over 117,000 chunks |
