Nether Portal Calculator

Convert coordinates between the Overworld and the Nether and check whether two portals will link correctly. Edit either side below — the other updates live.

The Nether is eight times smaller than the Overworld. Moving 1 block in the Nether is the same as moving 8 blocks in the Overworld — that's the 1:8 ratio, and it's why players dig Nether tunnels to cross huge Overworld distances quickly. To convert a spot, divide its Overworld X and Z by 8 (the height Y stays the same); to go back the other way, multiply by 8. For example, Overworld 800, 64, -1600 becomes Nether 100, 64, -200.

What you need: the coordinates of your portal or destination. In-game, press F3 (Java Edition) or turn on Show Coordinates (Bedrock) to read your X / Y / Z, then type them in below.

How it helps: plan a Nether travel hub so Overworld destinations map to tidy Nether coordinates, work out where to build the matching portal on the other side, and avoid the common bug where two nearby portals link to the same place — check that with the Portal Link Checker below.

Overworld

÷ 8 →
x
y
z

Nether

← × 8
x
y
z

For a reliable link, build both portals by hand at these exact matching coordinates. Only X and Z scale by 8 — Y stays the same. Lighting only one side lets Minecraft auto-place the other within a 128-block search box, which is what causes portals to link to the wrong place.

Portal Link Checker

Two Overworld portals cross-link to the same Nether portal if their Nether targets land within 128 blocks of each other. Portal A is the Overworld coordinate above; enter a second portal to check.

Portal A (Overworld) — from above
x
256
y
64
z
-512
Portal B (Overworld)
x
y
z
These portals will cross-link

Their Nether targets are 32 blocks apart (Overworld portals 256 blocks apart). To keep them separate, place the Overworld portals at least 1024 blocks apart (128+ in the Nether).

How to Use the Nether Portal Calculator

Convert coordinates between the Overworld and the Nether using Minecraft's 1:8 ratio, then check whether two portals will link correctly instead of joining to the same Nether portal.

Quick Steps

  1. 1Type an X / Y / Z coordinate into either the Overworld or Nether panel
  2. 2The other dimension's coordinate updates instantly (X and Z scale by 8, Y stays)
  3. 3Copy the coordinates or the ready-made /tp command
  4. 4Enter a second portal in the Portal Link Checker to test for cross-linking

Example Use Cases

  • Plan a Nether hub so overworld destinations map to tidy Nether coordinates
  • Fix portals that link to the wrong place by checking the 128-block search rule
  • Work out where to build the matching portal on the other side

Tips

Build both portals by hand at the exact converted coordinates for a guaranteed link
Keep separate Overworld portals more than 1024 blocks apart (128 in the Nether) so they don't share a portal
The Nether ceiling is Y 128 — very tall Overworld builds map above the walkable roof

Frequently Asked Questions

What does the 1:8 Nether ratio mean?

The Nether is eight times smaller than the Overworld: travelling 1 block in the Nether moves you 8 blocks in the Overworld. That 1:8 ratio is why a short walk through the Nether can cover a huge Overworld distance, and it is the whole reason players build Nether travel tunnels. In practice it just means you divide horizontal coordinates by 8 going into the Nether, and multiply by 8 coming back out.

How do I find my coordinates in Minecraft?

On Java Edition, press F3 to open the debug screen and read the XYZ line. On Bedrock Edition, enable "Show Coordinates" in the world settings (or run /gamerule showcoordinates true) and your position appears at the top of the screen. Enter those X, Y and Z numbers into the calculator to convert them.

How do you convert Overworld coordinates to the Nether?

Divide the X and Z coordinates by 8; the Y (height) stays the same. So Overworld 256, 64, -512 becomes Nether 32, 64, -64. Going the other way, multiply the Nether X and Z by 8. This 1:8 ratio has been the same in every version of Minecraft.

Does the Y coordinate change between dimensions?

No. Only the horizontal X and Z coordinates scale by 8 — Y is identical in both dimensions. Note the Nether has a bedrock ceiling at Y 128, so a high Overworld build may map to a Nether Y that is above the walkable roof.

Why do my nether portals link to the wrong place?

When you light only one portal, Minecraft searches for an existing portal within a 128-block box around the scaled destination and, if it finds one, links to it instead of building a new one. Two Overworld portals whose Nether targets are within 128 blocks of each other will share a single Nether portal. Build both portals by hand at the exact matching coordinates to avoid this.

How far apart do portals need to be so they do not link together?

Their Nether targets must be more than 128 blocks apart. Because the Nether is 1/8 the scale, that means the Overworld portals should be more than 1024 blocks apart (128 × 8) to guarantee separate, independent Nether portals. Use the Portal Link Checker on this page to test two coordinates.

Is the ratio different in Bedrock Edition?

No — Bedrock uses the same 1:8 Overworld-to-Nether ratio, so the coordinate conversion is identical. Portal linking search behaviour is very similar, so the "build both sides manually" advice applies to Bedrock too.

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