Linking portals without surprises
Every block you walk in the Nether counts as eight in the Overworld, on X and Z. Height doesn’t scale. The catch is that the game links you to the nearest portal it can find, so if you build carelessly you end up at a portal you didn’t mean to use, or the game makes a new one in a bad spot.
The fix is simple: build the second portal exactly where the math says it should be.
How to use it
- 01
Stand in your Overworld portal and write down X, Y and Z (F3 in Java, or turn on coordinates in Bedrock).
- 02
Enter them here. The calculator divides X and Z by 8 and keeps Y.
- 03
Go to the Nether, travel to those coordinates and build the matching portal there.
Good to know
- Two Overworld portals that are close together often end up sharing one Nether portal. Spread them out or check them here first.
- The Nether roof is bedrock at Y=127. Keep your portals well below it.
- If a portal links to the wrong place, break its frame and light a new one in the right spot. The old link is gone once the frame is.
Frequently asked questions
Is the ratio the same in Bedrock?
Yes. Both editions use 8 Overworld blocks per Nether block.
Why did I come out at a different portal?
The game picks the nearest portal inside its search area. If another one is closer than the one you built, you’ll arrive there.
Does a bigger portal change anything?
No. Frames can be anywhere from 4 × 5 to 23 × 23 blocks, but the size doesn’t affect how they link.
Can I start from the Nether side?
Yes. Switch the direction and the calculator multiplies X and Z by 8 to give you the Overworld position.
What’s the smallest portal I can build?
A 4 × 5 obsidian frame with a 2 × 3 opening. The corners are optional, so 10 obsidian is enough.
Is the Nether really faster for travel?
Yes. 1,000 blocks in the Overworld are only 125 in the Nether. With a tunnel between two portals, a long trip takes a minute or two.
