Exact Minecraft X/Z conversion

Nether Portal Coordinate Calculator

Convert one to twenty integer X/Z pairs between the Overworld and Nether using the exact 8:1 ratio. Keep exact results visible, choose Floor or Nearest block when you need an integer target, and copy valid rows locally without predicting portal links.

Batch coordinate conversion with explicit rounding

Convert one to twenty integer X/Z coordinate pairs between the Overworld and Nether with an exact 8:1 ratio. Results stay in this browser and describe a mathematical target, not a final portal link.

A coordinate target is not a portal link

Existing portals, portal search, generation, and placement rules can produce a different in-game outcome. This tool does not find or guarantee a final portal link.

Convert one to twenty integer X/Z coordinate pairs between the Overworld and Nether with an exact 8:1 ratio. Results stay in this browser and describe a mathematical target, not a final portal link.

Every valid row is calculated synchronously and deterministically in this browser. There is no network request or saved batch.

mapmc-nether-coordinate-ratio-v1

Conversion direction
Rounding for build targets

Exact values always remain visible. Floor and Nearest block add a separate integer build target.

For -4 ÷ 8 = -0.5, Floor is -1 and Nearest block is -1 because a half value rounds away from 0.

Source X/Z

Coordinate pairs

Add from 1 to 20 X/Z pairs. Enter ASCII digits 0–9 with an optional single leading ASCII minus sign.

Coordinate row 1

Source X/Z

Exact result

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Enter valid X and Z values in at least one row to copy results.

Exact ratio, not a portal-link prediction

The calculator applies the 8:1 coordinate ratio to each X and Z value independently with BigInt rational arithmetic. It does not use a map, seed, or portal search.

Y is not part of this X/Z conversion. The calculator does not choose height or generate a /tp command.

Every valid row is calculated synchronously and deterministically in this browser. There is no network request or saved batch.

Nether Portal Calculator FAQ

What is the Overworld-to-Nether coordinate ratio?
For X and Z, divide an Overworld coordinate by 8 to get the exact Nether target. Multiply a Nether coordinate by 8 to get the exact Overworld target.
How do Floor and Nearest block handle negative values?
Floor always moves toward negative infinity. Nearest block chooses the closest integer; an exact half moves away from 0, so -0.5 becomes -1.
Why is there no Y coordinate?
Y does not participate in the 8:1 X/Z ratio. This calculator therefore does not accept or choose a height, and it does not create a /tp command.
Does the calculated target guarantee a portal link?
No. It is only a mathematical X/Z target. Existing portals, portal search, placement, and generation rules can lead to a different in-game result.

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