Nether Portal Calculator

Sync portal coordinates between Overworld and Nether. The Nether compresses distance 8:1 on X and Z axes.

Direction

Overworld Coordinates

Y (not scaled)

Y is the same in both dimensions — build both portals at this height.

Nether Portal Location

Y64

Overworld distance from 0,00 blocks

Nether distance from 0,00 blocks

Scale factor8 : 1 (X and Z only)

Build Checklist

01Build and light a portal in Overworld at X=0, Y=64, Z=0

02Step through — the game will spawn or search for a portal in Nether near X=0, Z=0

03If no portal was created automatically, build one at X=0, Y=64, Z=0 and light it

04Travel back to verify the link works in both directions

Java 1.21 noteThe game searches for an existing portal within a 128-block radius (Overworld) or 16-block radius (Nether) of the arrival coords. If none found, it creates one at the nearest valid location. Place your portal within that radius of the calculated coords for a guaranteed link.