SimpleCalc
by endersgergo
SimpleCalc adds a calc command that evaluates mathematical expressions typed in chat, without any extra interface.
What it does
Players type a calc or eval command followed by an expression, and the result is printed in the chat. The evaluation uses the exp4j expression parser by objecthunter, so quick or complex calculations can be done without leaving the game. A help command lists the available functions and variables, and the exp4j homepage documents the full expression syntax. A server must run the mod for the command to work, while players may add it to their own installation. Builds exist for Fabric and NeoForge, both for 1.21.1 only, and the code is released under the MIT License, so it is open source.
Key features
Chat calculator command
A calc or eval command evaluates an arbitrary expression typed in game and prints the result in chat.
Function and variable help
A simple help command lists the functions and variables that expressions can use, so players know what is available.
No extra interface
Results appear in chat and no GUI is opened, keeping the calculator as a lightweight command.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
How it compares
Chat Calc is a Fabric client-side mod for 1.20.5 – 1.21.10 under the Mozilla Public License 2.0, so it differs from SimpleCalc in both environment and license. Calculator covers Forge and NeoForge for 1.20 – 1.21.11 and runs on the client only, while SimpleCalc needs a server.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| SimpleCalc | Fabric and NeoForge | 1.21.1 | Server required, client optional | 2025-09-18 |
| Chat Calc | Fabric | 1.20.5 – 1.21.10 | Client-side only | 2025-10-15 |
| Calculator | Forge and NeoForge | 1.20 – 1.21.11 | Client-side only | 2026-02-20 |
Questions
Does SimpleCalc need to be installed on the server?
In the catalog
SimpleCalc is one of 36,990 Utility mods on ModsFinder, and one of 25,772 Utility mods for Fabric. 32,366 mods support Minecraft 1.21.1.
Similar mods
What the author says
You can evaluate arbitrary mathematical expressions in-game by typing /calc eval for quick or complex calculations without fancy (bloated) GUIs. The mod also provides a simple help command listing the available functions and variables that you can use in expressions (see the exp4j's homepage for more on expressions).
Official listing
- Modrinth page
- modrinth.com/mod/simplecalc
- Owner
- endersgergo
- Published
- 2025-09-18
- Updated on Modrinth
- 2025-09-18
- Facts verified
- 2026-10-15