Nether Portal Calculator

Convert between Overworld and Nether coordinates at the correct 8:1 ratio, both directions, so your portals link up first try.

  • Runs in your browser
  • Free · No sign-up
  • Both directions
Enter a whole number.
Enter a whole number.
Your Nether coordinates
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Distance (blocks)
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Ratio
8 : 1

Y never changes between dimensions. Runs locally in your browser; nothing is uploaded.

How the 8:1 ratio works

One Nether block covers the same distance as eight Overworld blocks, so travel in the Nether is eight times faster. The maths is a simple division or multiplication on X and Z: Nether X = Overworld X ÷ 8, Overworld X = Nether X × 8 (same for Z; Y unchanged). The calculator rounds to whole blocks, which is what portals snap to.

Frequently asked questions

What is the Overworld to Nether coordinate ratio?

8:1. One block of Nether travel equals eight blocks in the Overworld, so divide Overworld X and Z by 8 to find the matching Nether position (and multiply Nether coordinates by 8 for the return trip). Y is unchanged.

Why does my Nether portal link to the wrong place?

Portals link by proximity: the game pairs Nether and Overworld portals that are closest to each other in scaled coordinates, searching within a radius. If two portals are near each other, link them deliberately by aligning their scaled coordinates with this calculator, ideally at matching Y.

Does Y matter for portal linking?

In modern Java Edition, the game prefers the closest portal within a search area and does consider height when overlaps occur. Best practice: align X and Z exactly via the calculator, and keep Y within a few blocks between paired portals.

How close do two portals need to be to link?

Linking searches a radius (roughly 128 blocks in scaled terms) for a candidate portal. The safest approach is making the intended partner the only portal within that radius, or the strictly nearest one; the calculator gives you coordinates that overlap exactly.

Does this work for servers and realms?

Yes, the 8:1 ratio is a game mechanic, identical everywhere. Server plugins that change portal behaviour are rare; if your server has one, follow its docs.