It is the ratio Minecraft uses between the two dimensions, and it is the whole point of Nether travel: one block walked in the Nether moves you eight in the Overworld. A thousand-block journey becomes a hundred and twenty-five.

Is Y divided as well?

No. Height is the same in both dimensions, which is why a Nether hub is usually built well above the lava at a convenient Y and the Overworld side can sit at whatever height the ground happens to be.

I built a portal at the right coordinates and it linked somewhere else.

Coordinates are only half of it. A portal searches for an existing one nearby before creating a new one, so a portal already in the area can capture your link. The fix is to build both ends by hand at the matching coordinates rather than letting the game generate the far side.

Should I round up or down?

Neither matters much - round to the nearest block. Linking has tolerance built in, and a block either way will not change which portal you arrive at.

Does this work for the End?

No. The End has no coordinate compression and no portal linking of this kind. The 8 to 1 ratio is a Nether thing.

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Nether Portal Coordinate Calculator

Convert Minecraft coordinates between the Overworld and the Nether, both directions at once, so your portals link where you want them.

Enter a set of coordinates. Both conversions are shown, so you do not have to decide first which way round you are working.

Your details

X coordinate(blocks)

Z coordinate(blocks)

Y coordinate (height)(blocks)

Carried across unchanged — Y is never divided.

Result

If Overworld → Nether X

125

Divide by 8 and round.

If Overworld → Nether ZDivide by 8 and round.: 31
If Nether → Overworld XMultiply by 8.: 8,000
If Nether → Overworld ZMultiply by 8.: 2,000
Y in both dimensionsUnchanged. Height is not compressed.: 64

About this tool

How Nether Portal Coordinates Work

Divide X and Z by 8 going in, multiply by 8 coming out, and never touch Y. The maths, and why portals still link to the wrong place.

Free download

Nether Hub Planning Sheet

Work out every portal pair before you build, so the hub links the way you meant it to.

Free, no email required — print it or save it as a PDF.

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Nether Portal Coordinate Calculator infographic

The key numbers as one image — free to save, share, or embed on your own site with credit.

How this is calculated

The Nether is compressed 8 to 1 horizontally. One block travelled in the Nether covers eight in the Overworld, which is the whole reason Nether travel is worth the trouble. So Overworld to Nether divides X and Z by 8, and Nether to Overworld multiplies them by 8. Both are shown here because you rarely remember which way you are converting. Y - your height - is NOT divided. The same Y in both dimensions, and the Nether roof at Y=128 is the practical ceiling for a Nether hub. The divided figures are rounded to the nearest whole block, which is what you want when placing a portal. A block either way makes no difference to linking. This is the coordinate maths only. Which portal a given portal actually links to also depends on search distance and on whether a portal already exists nearby - see the guide.

Common questions

Why 8 to 1?: It is the ratio Minecraft uses between the two dimensions, and it is the whole point of Nether travel: one block walked in the Nether moves you eight in the Overworld. A thousand-block journey becomes a hundred and twenty-five.
Is Y divided as well?: No. Height is the same in both dimensions, which is why a Nether hub is usually built well above the lava at a convenient Y and the Overworld side can sit at whatever height the ground happens to be.
I built a portal at the right coordinates and it linked somewhere else.: Coordinates are only half of it. A portal searches for an existing one nearby before creating a new one, so a portal already in the area can capture your link. The fix is to build both ends by hand at the matching coordinates rather than letting the game generate the far side.
Should I round up or down?: Neither matters much - round to the nearest block. Linking has tolerance built in, and a block either way will not change which portal you arrive at.
Does this work for the End?: No. The End has no coordinate compression and no portal linking of this kind. The 8 to 1 ratio is a Nether thing.

Take it further with AI

Copy this into ChatGPT or Claude with your own numbers filled in. It hands over the figures this calculator worked out, so the answer is built on real arithmetic instead of a guess.

I used the Nether Portal Coordinate Calculator at https://www.bfcbrilliance.com/tools/nether-portal-calculator.

What I entered:
- X coordinate (blocks): ___
- Z coordinate (blocks): ___
- Y coordinate (height) (blocks): ___

What it calculated:
- If Overworld → Nether X: ___
- If Overworld → Nether Z: ___
- If Nether → Overworld X: ___
- If Nether → Overworld Z: ___
- Y in both dimensions: ___

Use those figures as given — they are already worked out, so please don't recalculate or estimate your own. Help me turn them into a plan: what to buy or do, in what order, roughly what it should cost, and the mistakes people most often make with this job.

Last updated Jul 31, 2026

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