Nether Portal Calculator
Convert Overworld X and Z coordinates to the Nether and back using Minecraft's 1:8 dimension ratio.
Minecraft Nether Portal Coordinates
The Nether compresses horizontal distance. One block traveled in the Nether equals eight blocks in the Overworld on the X and Z axes. The Y coordinate does not scale, so height stays the same in both dimensions.
Overworld to Nether Conversion
Divide Overworld X and Z by 8 to find the linked Nether position:
$$ X_{\text{Nether}} = \left\lfloor \frac{X_{\text{Overworld}}}{8} \right\rfloor $$ $$ Z_{\text{Nether}} = \left\lfloor \frac{Z_{\text{Overworld}}}{8} \right\rfloor $$Example: Overworld coordinates (1000, 64, -500) map to Nether (125, 64, -63).
Nether to Overworld Conversion
Multiply Nether X and Z by 8 to estimate the Overworld link point:
$$ X_{\text{Overworld}} = X_{\text{Nether}} \times 8 $$ $$ Z_{\text{Overworld}} = Z_{\text{Nether}} \times 8 $$Link portals carefully when multiple portals exist nearby, because Minecraft searches a radius around the converted point before creating a new portal.
See also the End Portal Finder and Minecraft Stack Calculator.
Frequently Asked Questions
What is the Nether to Overworld ratio?
Horizontal travel uses a 1:8 ratio. One Nether block equals eight Overworld blocks on X and Z.
Does Y coordinate change in the Nether?
No. Y stays the same when converting between dimensions in this calculator.
Should I use floor or round when dividing by 8?
Minecraft uses floor division for negative coordinates too, so -100 becomes -13 in the Nether, not -12.
How many obsidian blocks do I need for a portal?
A minimum portal frame is 4 blocks wide and 5 blocks tall, using 10 obsidian without corners.
Why did my portal link to the wrong place?
When portals already exist near the converted coordinates, the game sends you to the nearest portal within its search range.
Can I build a Nether portal in the End?
No. Nether portal frames outside the Overworld or Nether will not activate when lit.
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