Chat Calcus
by justElias
Chat Calcus lets players type arithmetic and math expressions straight into the Minecraft chat and receive the result without leaving the game.
What it does
Typing an expression into chat returns its answer in the chat window. Addition, subtraction, multiplication and division are handled directly, and the mod also evaluates functions such as square roots, absolute values, trigonometric functions and logarithms. A help menu lists the available functions, operators and usage instructions inside the game, so no outside reference is needed.
The mod is client-side only, so a player can use it on a single-player world or on any server without the server installing anything. It needs Fabric API and is published for Fabric only, with files for 1.20.4 and 1.21.1; the latest file, 0.0.1-1.21.1 for 1.21.1, appeared on 2024-10-24. Chat Calcus is open source under the MIT License, and its source code is public.
Key features
Calculator in chat
Expressions typed into the Minecraft chat window are evaluated and the result is shown in place.
Arithmetic operations
Addition, subtraction, multiplication and division are supported in a single expression.
Mathematical functions
Square root, absolute value, trigonometric functions and logarithms can be used inside an expression.
In-game help menu
A help menu lists the available functions, operators and usage instructions without leaving the game.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 1
Use cases
Quick sums while building
A player working out block counts, distances or resource totals can compute the answer in chat without switching to another program.
Math homework in game
Students who play Minecraft can check a calculation with trigonometry or logarithms in the same window they are already using.
Who it’s for: Players who often need a quick calculation while playing, and players who want a calculator that runs on the client alone without changing the server.
How it compares
McCalc is client-side only and open source under the MIT License, but its only listed version is 1.19.1, so it does not cover 1.20.4 or 1.21.1. Mineculator is not open source, is published under All rights reserved, and works on a client, a server or both for 1.20.1 – 1.21.10. Simple Calculator is client-side only, open source under the MIT License, and targets 1.21.5 alone. QuickCalc is client-side only and open source under the GNU Lesser General Public License v3.0 only, but it covers 1.16.5 – 1.18, which is older than this mod's range.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Chat Calcus | Fabric | 1.20.4 – 1.21.1 | Client-side only | 2024-10-24 |
| McCalc | Fabric | 1.19.1 | Client-side only | 2022-08-21 |
| Mineculator | Fabric | 1.20.1 – 1.21.10 | Client or server, optional | 2025-10-22 |
| Simple Calculator | Fabric | 1.21.5 | Client-side only | 2025-05-27 |
| QuickCalc | Fabric | 1.16.5 – 1.18 | Client-side only | 2021-12-05 |
Questions
Does Chat Calcus need Fabric API?
Does the server need Chat Calcus?
Which game versions does Chat Calcus support?
In the catalog
Chat Calcus 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.
More from justElias
Similar mods
Official listing
- Modrinth page
- modrinth.com/mod/chat-calcus
- Owner
- justElias
- Published
- 2024-02-20
- Updated on Modrinth
- 2024-10-24
- Facts verified
- 2026-10-15