Minecraft Nether Portal Calculator
To link a Nether portal, divide your Overworld X and Z by 8; to come back, multiply your Nether X and Z by 8. Y stays the same. Build the second portal at the converted coordinates and the two will connect.
Build your Nether portal at
X 100, Y 64, Z -150
How to link two Nether portals
- Stand where your Overworld portal is (or will be) and note X, Y and Z (F3 in Java, Show Coordinates in Bedrock).
- Enter them above with Overworld → Nether selected.
- Go through any portal into the Nether, travel to the X and Z shown, and build a portal there at a similar Y.
- Walk back through it: you arrive at the Overworld portal you started from.
- Obsidian: at least 10 blocks for a frame without corners
- Flint and steel: lights the portal
Overworld to Nether conversion table
| Overworld | Nether |
|---|---|
| X 0, Y 64, Z 0 | X 0, Y 64, Z 0 |
| X 100, Y 70, Z -250 | X 12, Y 70, Z -32 |
| X 800, Y 64, Z 800 | X 100, Y 64, Z 100 |
| X -1000, Y 72, Z 400 | X -125, Y 72, Z 50 |
| X 1234, Y 80, Z -5678 | X 154, Y 80, Z -710 |
| X 5000, Y 64, Z 5000 | X 625, Y 64, Z 625 |
| X -7, Y 64, Z 15 | X -1, Y 64, Z 1 |
| X 30000, Y 100, Z -30000 | X 3750, Y 100, Z -3750 |
Why does my portal link to the wrong place?
When you go through a portal, the game looks for an existing portal near the converted coordinates and uses it if one is close enough; only if none is found does it build a new one. So a portal that links to the wrong place usually means another portal is nearer to the target than the one you built. Rebuild the second portal at the exact converted X and Z, and keep separate portal pairs far apart.
Java vs Bedrock portals
The 1 : 8 ratio and the unchanged Y are the same in both editions, so this calculator works for Java and Bedrock. Remember the Nether is shallower, and bedrock can cover its roof from Y 123 and its floor up to Y 4. A five-block-tall portal frame must fit between them, so the calculator keeps the result between Y 5 and Y 118.