Prevent portal mislinks instantly. Enter your Overworld coordinates to get the exact Nether position to build your linked portal — or vice versa. The Nether compresses all X/Z distances by a factor of 8.
Press F3 in Java Edition, or enable Show Coordinates in Bedrock settings. You need your X and Z values.
Enter your X and Z in the panel matching your current dimension and tap Calculate. Y (height) is not converted.
Travel to the output coordinates in the other dimension and build your portal there to guarantee they link correctly.
If no portal exists within 128 Nether blocks (1024 Overworld), the game spawns one automatically — often in the wrong spot.