Nether Portal Coordinate Calculator
Convert Overworld coordinates to Nether coordinates (divide by 8) or the reverse (multiply by 8), with the portal linking rule explained so a new portal connects to the one you already built.
Nether X
150
Y
64
Nether Z
-43.75
How it's calculated
Overworld to Nether:
netherX = overworldX / 8, netherZ = overworldZ / 8, netherY = overworldY
Nether to Overworld is the same relationship in reverse:
overworldX = netherX × 8, overworldZ = netherZ × 8, overworldY = netherY
Worked example
An Overworld base at X 1200, Y 64, Z -350 converts to Nether coordinates X 150, Y 64, Z -43.75. Converting that Nether coordinate back gives X 1200, Y 64, Z -350 -- an exact round trip, the same reconciliation checked in the site's own test suite. Note Z divides to a fraction (-350 / 8 = -43.75): a real portal still occupies a whole block, so treat the converted coordinate as the center of the area to search or dig in, not a single exact block.
Frequently Asked Questions
Why is the Overworld:Nether ratio exactly 8:1?
It's a fixed game constant, not an approximation -- one block traveled in the Nether corresponds to eight blocks in the Overworld along the X and Z axes. It's what makes the Nether useful as a shortcut: walking 1,000 Overworld blocks takes as long as walking 125 Nether blocks covering the same ground distance.
Does the ratio apply to the Y (vertical) coordinate too?
No -- Y is unscaled. A portal at Overworld Y=64 and one at Nether Y=64 are at the same relative height; only X and Z are divided or multiplied by 8 when converting between dimensions.
Why did my new portal not link to my existing one?
A portal searches within 128 blocks (in Nether coordinates) of its converted position for an existing linked portal before generating a new one. If your existing Overworld portal converts to a Nether coordinate more than 128 blocks from where you dug the new one -- easy to do if the conversion math was off, or if terrain forced you to build somewhere else -- the game creates a brand-new, unlinked portal instead of connecting to the old one.
Can I use this calculator the other way -- Nether to Overworld?
Yes -- toggle the direction above. This is the more common real use: you're already standing at a Nether coordinate and want to know approximately where that lines up in the Overworld before you build a portal there.
Circle In Blocks is a set of fan-made building tools, not affiliated with Mojang or Microsoft; Minecraft is a trademark of Mojang Studios. Grids are generated from the geometry described above, not pulled from the game itself -- see the Terms.