Nether portal calculator
Two worlds. One shorter journey. Java & Bedrock
Where are you starting?
Negative coordinates and decimals work too. Height (Y) is not multiplied or divided.
See destination ↓Overworld
- X
- Z
Nether
- X
- Z
The block containing the exact destination. Rounded down, including negative numbers.
The exact coordinates already fall on whole blocks.
Drag to rotate · Illustrative scene, not your world or a distance map.
Keep multiple destinations in your workbench. Saved on this browser and device.
Check the destination in game. Terrain, height and nearby portals affect the actual link. Choose a safe Y level and test travel in both directions.
How to link Nether portals using coordinates
Overworld to Nether: divide by eight
In standard modern Java and Bedrock worlds, one block travelled horizontally in the Nether corresponds to eight blocks in the Overworld. Divide Overworld X and Z by 8 to find the Nether target. For example, X 1000 and Z −500 become X 125 and Z −62.5.
Nether to Overworld: multiply by eight
Multiply Nether X and Z by 8. Nether X 125 and Z −62.5 return to Overworld X 1000 and Z −500. Swap direction keeps the exact coordinates, including decimals. Coordinates on the cards show up to six decimal places; the destination block uses the unrounded result.
Negative coordinates and block positions
A decimal position lies inside a block. This tool uses floor to identify it: −0.125 is in block −1, not block 0. The exact position and its containing block are shown separately. The suggested block is a reference position for planning, not a guarantee that the game will create a portal there.
Height and existing portals still matter
Do not divide Y by eight. Pick a safe, valid height in your world. The game searches for existing portals near the converted location, and vertical separation can affect which portal is used. A matching X/Z pair alone does not force a link. This tool does not inspect your seed, terrain, world border or existing portals.
Build, test, then save the destination
Record your first portal coordinates. Check the converted location in the other dimension, build and activate a portal in a safe space, then test the trip both ways. The minimum rectangular frame uses 10 obsidian without corners, or 14 with corners, plus a way to light it. Crying obsidian cannot replace ordinary obsidian in the frame.
Name destinations such as your base or a village and save each one to the workbench. Share links include the dimension and coordinates; destination names stay private. Download notes to keep both coordinate pairs outside the browser.
Conversion uses the standard 8:1 ratio, not custom dimension scales or legacy world settings. Supported input and output coordinates are within ±29,999,984; your actual world border may be smaller. Count your obsidian stacks before the trip.