Minecraft Chunk Border Calculator
Find the Minecraft chunk you are standing in, its exact block borders, how many blocks to each edge and the neighbouring chunks and region file.
Minecraft splits every world into chunks of 16 × 16 blocks that run from bedrock to the build limit. Farms, mob spawners, redstone clocks and slime-chunk builds all work better when they sit neatly inside one chunk, because chunks load and unload as a unit. Enter your coordinates to see which chunk you are in, where its borders are and how far you are from each edge.
How to use this tool
- Press F3 in Java Edition (or turn on Show Coordinates in Bedrock) and read your X and Z.
- Type X and Z into the calculator; decimals are fine.
- Optionally add Y to find your 16-block-tall section.
- Read the chunk borders, the distance to each edge and the neighbouring chunks below.
Formula
Chunk X = ⌊X ÷ 16⌋, Chunk Z = ⌊Z ÷ 16⌋
⌊ ⌋ means round down, so negative coordinates round away from zero: block −1 is in chunk −1. The chunk covers blocks 16 × chunk to 16 × chunk + 15. The region file is r.⌊chunk X ÷ 32⌋.⌊chunk Z ÷ 32⌋.mca.
Example
Standing at X 1234, Z −567: 1234 ÷ 16 = 77.1, so chunk X is 77; −567 ÷ 16 = −35.4, which rounds down to −36. The chunk spans X 1232–1247 and Z −576 to −561. You are 2 blocks in from the west edge and 9 from the north, so the nearest border is west, 3 blocks away. The chunk is stored in r.2.-2.mca.
Frequently asked questions
How do I see chunk borders in Minecraft?
In Java Edition press F3 + G to toggle chunk border lines. Bedrock Edition has no built-in border view, which is where this calculator helps.
Why is block −1 in chunk −1 and not chunk 0?
Chunk coordinates round down. Chunk 0 covers blocks 0 to 15, and chunk −1 covers blocks −16 to −1.
How tall is a chunk?
A chunk runs the full height of the world. In Java Edition 1.18 and later the Overworld spans Y −64 to 319, split into 24 sections of 16 blocks each.
Where should I build a farm inside a chunk?
Keep machines that must keep running within a single chunk or a few whole chunks, so nothing ends up half-loaded near a border.
Sources
Last updated: 2026-10-30