Minecraft Chunk Calculator
Calculate chunk coordinates, local 0–15 block offsets, chunk boundary corners, and Anvil region file names (r.X.Z.mca) from any block position.
16×16 chunk boundaries apply to both Java and Bedrock; .mca region filenames apply to Java Edition Anvil saves.
How to Use Minecraft Chunk Calculator
- 01.Enter any block X, Y, and Z coordinate.
- 02.View the Chunk Coordinates (Chunk X, Section Y, Chunk Z), local block offset within the 16×16 chunk, and exact Northwest/Southeast corner coordinates.
- 03.Inspect your position inside the visual 16×16 chunk grid and see the corresponding Java Anvil region filename (r.x.z.mca).
How It Works
Uses arithmetic floor division (Math.floor(coord / 16)) for chunk coordinates, positive modulo ((coord % 16) + 16) % 16 for local offsets, and Math.floor(chunk / 32) for region files.
Supported Formats & Outputs
- • Block Coordinates
- • Chunk Coordinates
- • Anvil Region (r.x.z.mca)
Common Questions about Minecraft Chunk Calculator
How big is a Minecraft chunk?
Every chunk is 16×16 blocks horizontally (256 blocks per layer) and spans from the bottom to the top of the world (Y = -64 to 319 in modern versions).
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