Tools / Minecraft
Minecraft Nether Coordinate Calculator
Convert Overworld coordinates to the Nether and back at the 8:1 ratio - live, both directions. Type into either side and the other updates, so you can build linked portals that connect exactly where you want. Runs in your browser.
Overworld
↔
Nether
Build the matching portal at:
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How Nether portal linking works
The Nether is compressed 8:1 horizontally: one block there covers eight Overworld blocks. To make two portals link reliably:
- Build and light your first portal, and note its coordinates (press F3 on Java, or check the map/coords on Bedrock).
- If it is in the Overworld, divide X and Z by 8 to get the Nether target. If it is in the Nether, multiply X and Z by 8 to get the Overworld target. Y stays the same.
- Travel to that target and build a second portal within a few blocks of it. Lighting a portal at the calculated spot stops the game from linking to a far-away portal or generating a stray one.
Tip: the Nether roof is at Y=128, so a very high Overworld portal can map above the playable Nether - drop the Y a bit when that happens. Planning a big linked network or a Nether highway is a classic server project; the tool is free and the math is the same on Java and Bedrock.