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Minecraft Nether Portal Calculator

Overworld to Nether: divide X and Z by 8 and round down; Y stays the same. Example: 800, 64, −200 becomes 100, 64, −25.

Build your Nether portal at

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These are planning coordinates; check the destination in-game.

Have commands on? Teleport there Java
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Command preview only. Change the route edition in the saved route section below.

Linking several portals? Save this one

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Save the X/Y/Z you entered above as your chosen or measured entrance. To save the other end, change direction and enter that entrance’s coordinates.

Came out at a different portal?

Nearby portals, entry height and portal shape can change where you come out. Record where you arrived to compare it with your saved entrances.

Named portal routes
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Keep named entrance pairs and your own in-game checks. Each route has separate coordinates, edition and manual records. Calculated targets do not establish where a portal will take you.

Manage routes
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At most 30 routes. Names: 80 characters; world/server: 120 characters. New creates an empty route using these names. Saves stay in this browser.

Saved Overworld entrance

No entrance saved.

Saved Nether entrance

No entrance saved.

Manual construction & round-trip checklist

Check these only after you have done them in your world. This page does not test the game, detect nearby portals, or certify linking or safety.

Save both entrances to enable the manual checklist.

Copy or review pair notes

Export or import routes
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Files include coordinates and player-entered checks. JSON imports add new routes; they never replace existing ones. Checkmarks are manual records, not a game certificate. Files are processed on this device and coordinates are not placed in sharing URLs.

Optional: investigate unexpected arrivals

Only your entered candidates and other saved routes with the same non-empty world/server name and edition are compared. Distances include Y. This page does not scan your world or predict the selected portal. Check entry position, portal geometry, edition and nearby portals in-game.

1. Record where you actually arrived

2. Add nearby entrances you know about

3. Compare both directions

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Search-range reference: Java 1.16.2+ uses a smaller horizontal search area when traveling to the Nether; Bedrock differs. This comparison shows entered points and distances only, without classifying search eligibility or guaranteeing links.

Overworld → Nether observations

Nether → Overworld observations

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Saved only in this browser on this device; no account or sync. Pair coordinates and checklist entries are not sent to analytics. Local storage details.

About this tool and common questions

How do you convert Overworld coordinates to the Nether?

Divide X and Z by 8, round each result down, and keep Y unchanged. For example, Overworld (800, 64, −200) becomes Nether (100, 64, −25): 800 ÷ 8 = 100 and −200 ÷ 8 = −25. Y stays 64; it is not divided by 8.

Use the Nether to Overworld calculator for the return trip: multiply X and Z by 8. Nether (100, 64, −25) becomes Overworld (800, 64, −200). These are target coordinates for planning a portal; they do not guarantee where an existing portal will take you.

How are negative coordinates rounded?

This calculator uses floor, which rounds toward negative infinity. Overworld (−9, 64, −1) becomes Nether (−2, 64, −1): −9 ÷ 8 = −1.125 rounds down to −2, and −1 ÷ 8 = −0.125 rounds down to −1. Y remains 64.

The Java/Bedrock choice changes the command syntax, not this rounding rule.

Why can a portal lead to an unexpected entrance?

Converted coordinates are a planning target. Check nearby portals, entry height and portal shape when investigating unexpected arrivals. Record the actual entrances and test both directions in your world. Lighting both portals does not guarantee a one-to-one connection.

Does this teleport change dimension?

Yes. A plain coordinate-only /tp stays in your current dimension. The copied command uses execute in to select the destination dimension first. For the example above, run the command for your edition from player chat with commands enabled:

Java: /execute in minecraft:the_nether run tp @s 100 64 -25

Bedrock: /execute in nether run tp @s 100 64 -25

@s means you, the player running the command. For the return trip the calculator uses minecraft:overworld in Java or overworld in Bedrock. The command teleports you; it does not build or link a portal.

Which portal search rules apply?

Java 1.16.2+ reference: the horizontal search area extends 16 blocks each way along X and Z in the Nether, or 128 in the Overworld. Candidate distance also includes Y. These are search references, not a guarantee that an entered point will be chosen.

Use this as a Bedrock Nether portal calculator for coordinate conversion and Bedrock teleport commands. Routing has not been independently verified for this tool. Check recorded arrivals in your version and world; this page does not simulate portal selection.

Command references and limits

See the official Java execute-in command notes and Bedrock execute reference for dimension-changing command syntax. Older releases with legacy command syntax, custom dimensions, and server plugins may behave differently.

The calculator scales horizontal coordinates only. It does not inspect terrain, find a safe landing spot, or simulate nearby portals. Choose a safe Y and check the destination in your world.

How these calculations are checked.

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