ModsFinder

PortalCalc

by BsVerta

PortalCalc adds a CalcPortal command that converts a position in the Overworld to matching Nether coordinates, and the reverse.

FabricClient-side onlyMIT LicenseOpen source1.21.11

What it does

Typing the command with coordinates returns the corresponding location on the other side of the portal, so a player building a Nether portal can line up the two sides without manual arithmetic. The mod is kept to this one command, without extra blocks, items or interface changes. Only the client needs it, so a server can be joined without installing anything. Files are published for Fabric only, for 1.21.11, with 1.0.0 as the latest build, released under the MIT License and open source.

Key features

  1. CalcPortal command

    A single command converts coordinates between the Overworld and the Nether with a one-line input.

  2. Matching Nether position

    The result gives the corresponding Nether coordinates for a given Overworld position, and the reverse direction works the same way.

  3. Narrow scope

    The mod adds only this command and no other content, unlike larger bundles that carry many unrelated features.

Compatibility

Latest build for each game version and loader.

1.21.111.0.0
ReleaseBetaAlphaNot available

Only full game releases are shown. This mod publishes no snapshot builds.

How it compares

Full comparison

Nether Coordinates is a Fabric client mod for 1.21.11 under All rights reserved, and it is not open source. Coords HUD is another Fabric client mod for 1.21.11 under CC0 1.0 Universal, and it is not open source. Pebble's Portal Commands targets 1.21.1 on the server side under CC0 1.0 Universal and is not open source, so it differs in version and environment.

ModLoadersGame versionsEnvironmentUpdated
PortalCalcFabric1.21.11Client-side only2026-08-30
Nether CoordinatesFabric1.21.11Client-side only2026-02-08
Coords HUDFabric1.21.11Client-side only2026-09-03
Pebble's Portal CommandsFabric1.21.1Server-side only2025-03-29

Questions

Does PortalCalc need Fabric API?

The catalog lists no required dependencies for PortalCalc, and the files are published for Fabric only.

In the catalog

PortalCalc is one of 8,016 Management mods on ModsFinder, and one of 5,930 Management mods for Fabric. 19,862 mods support Minecraft 1.21.11.

Management mods8,016Fabric modsMods for 1.21.1119,862

Similar mods

Cherished Worlds1.12.2 – 26.3Default Options1.18 – 26.3Axiom1.20 – 26.3Resourcify1.8.9 – 26.3Rebind Narrator1.16.1 – 26.1.2Paxi1.19.2 – 26.1.2

What the author says

The mod adds a new command named CalcPortal. If you type the command, it will automatically calculate the corresponding coords for the Nether side, and if you are in the Nether, it will calculate the corresponding coords for the Overworld. Unlike some other mods, this one is not bloated with unwanted stuff. It does…
BsVerta, on the Modrinth page

Official listing

Owner
BsVerta
Published
2026-08-30
Updated on Modrinth
2026-08-30
Facts verified
2026-10-15

Tags

ManagementUtility
Open on ModrinthCompare