Gaming calculator
Nether Portal Calculator
Convert Minecraft coordinates between the Overworld and the Nether so your portals link exactly where you want them.
Overworld coordinates
Whole block coordinates only. Negative values are fine.
Nether portal coordinates
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Portal link range
Enter coordinates to see which existing portals could capture the link. The game searches 128 blocks horizontally in the Overworld and 16 blocks in the Nether.
Safe linking tip: build the Nether portal within 16 blocks of the computed Nether X and Z. That is the same as building the Overworld portal within 128 Overworld blocks of the scaled location.
Nether travel distance
Every block walked in the Nether covers 8 blocks of Overworld distance.
Equivalent distance in the Nether
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How Nether portals link
The Nether is compressed: one block of horizontal travel in the Nether equals eight blocks in the Overworld. When you step through a portal, the game scales your X and Z coordinates by that 8:1 ratio, keeps Y as-is, and then looks for an existing portal near the scaled position. In Java Edition it searches within 128 blocks horizontally when arriving in the Overworld and within 16 blocks when arriving in the Nether. If it finds one, you are sent there. If not, it builds a new portal as close to the scaled position as it can.
That search step is why portals sometimes link to the "wrong" place. Two Overworld portals less than roughly 256 blocks apart can both scale down to within 16 blocks of the same Nether portal, so they share it. Linking portals reliably means building the Nether portal close to the computed coordinate and making sure no other portal sits inside the search range.
Nether portal formulas
The division often produces a fraction. Java Edition rounds the scaled value down to the nearest block (a floor), so 1000 ÷ 8 = 125 stays 125, while -2401 ÷ 8 = -300.125 becomes -301. Calquo shows both the exact value and the floored block coordinate.
Example: linking a base at 1000, 70, -2400
Suppose your Overworld base is at X 1000, Y 70, Z -2400. Divide X and Z by 8: 1000 ÷ 8 = 125 and -2400 ÷ 8 = -300. Y is unchanged, so the matching Nether coordinate is 125, 70, -300. Build a portal within 16 blocks of X 125 and Z -300 in the Nether, light it, and it will link to the base. Coming back the other way, 125 × 8 = 1000 and -300 × 8 = -2400, which lands you at the base portal.
How to link two portals step by step
- Build and light your Overworld portal, then stand in front of it and note the X, Y, and Z coordinates.
- Enter those coordinates above with the direction set to Overworld to Nether. Write down the floored Nether X and Z.
- Travel to that spot in the Nether. Tunnel, bridge, or dig to reach it, staying as close as possible to the target X and Z and at a similar Y if you can.
- Check the link range shown in the calculator. If another lit portal already exists within 16 blocks of the target, break it or move further away, otherwise your new portal will share its link.
- Build the Nether portal within 16 blocks of the computed X and Z, light it, and walk through. You should arrive at your Overworld portal.
- Walk back through from the Overworld to confirm the link works in both directions.
Frequently asked questions
Why did my portal link to the wrong portal?
The game reuses any existing portal it finds inside the search range, and that range is generous: 128 blocks horizontally in the Overworld and 16 blocks in the Nether. If an older portal sits within that distance of the scaled position, the game links to it instead of creating a new one. Build the destination portal manually at the computed coordinate before travelling, or disable the older portal, to force the link you want.
Does the Y coordinate matter?
Y is not scaled, so it does not affect the 8:1 conversion of X and Z. It does matter for where the game places a new portal: the Nether has a bedrock roof at Y 128, so a portal at a high Overworld Y cannot be matched exactly and will be created lower down. Keeping both portals at a similar Y also helps the game choose the intended portal when several are in range.
Do Bedrock Edition and Java Edition differ?
Both editions use the same 8:1 horizontal ratio, so the coordinate conversion shown here applies to both. The exact search distances and the rules for picking between several candidate portals have changed across versions and are implemented separately in each edition, so treat the search radius figures as Java Edition values and verify in-game on Bedrock if precision matters.
What happens with negative coordinates?
Negative coordinates work the same way; the sign is preserved when you divide or multiply by 8. The only subtlety is rounding: flooring moves towards negative infinity, so -301 ÷ 8 = -37.625 becomes -38, not -37. The calculator applies this automatically.
How do I see my coordinates in-game?
On Java Edition press F3 to open the debug screen; the XYZ line shows your exact position and the Block line shows the block coordinate. On Bedrock Edition turn on Show Coordinates in the world settings (Game section) and they appear in the top-left corner of the screen.
Is this tool affiliated with Minecraft?
No. Calquo is not affiliated with, endorsed by, or associated with Mojang or Microsoft. Minecraft is a trademark of its respective owner; this calculator is an independent fan tool that works entirely in your browser.