Simple In-Game Calculator
by andriyt2233
Simple In-Game Calculator opens a compact arithmetic panel inside Minecraft, so players can work out resource counts without leaving the game.
What it does
A single keypress opens the calculator on top of the game interface, which removes the need to Alt-Tab to a phone or desktop app while planning a large build, a redstone farm or a stock of materials. The panel stays small, and its layout is sized for the standard GUI scale of 2 so it does not cover the whole view.
The mod is client-side only, so no server installation is needed and only the player who runs it has the panel. It is built for Fabric 1.21.4, and the latest file, 1.21.4 for 1.21.4, was published on 2026-05-07. Fabric API must be installed alongside it. The mod is released under the Apache License 2.0 but is not open source.
Key features
Single-key access
A single keypress opens the calculator, so the panel can be reached in the middle of play.
Smart number formatting
Large results are shown with dots as separators, which makes long totals easier to read.
Basic arithmetic
Addition, subtraction, multiplication and division are supported in one compact panel.
Clear and backspace controls
A clear screen button and a backspace button correct typing mistakes without restarting the entry.
Matching interface style
Buttons and panels follow the standard Minecraft UI style, so the calculator blends with the rest of the game's screens.
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
Planning builds
A player can total block counts for a wall or a floor before gathering materials.
Redstone and farm sizing
Quantities of components and crop yields can be calculated on the spot while the layout is still being tested.
Who it’s for: Players on Fabric who want arithmetic available inside the game during building, farming or redstone work. Servers do not need the mod, since it is client-side only.
How it compares
Simple Calculator is client-side only, open source under the MIT License and published for Fabric 1.21.5. Calculator Mod is also client-side only and open source, under the GNU General Public License v3.0 only, with files for Fabric 1.20.6 – 1.21. Calculator In Chat is client-side only as well, but it is not open source, uses a custom license and targets Fabric 1.21.8, so this mod is the only one here built for 1.21.4.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Simple In-Game Calculator | Fabric | 1.21.4 | Client-side only | 2026-05-07 |
| Simple Calculator | Fabric | 1.21.5 | Client-side only | 2025-05-27 |
| Calculator Mod | Fabric | 1.20.6 – 1.21 | Client-side only | 2024-06-15 |
| Calculator In Chat | Fabric | 1.21.8 | Client-side only | 2025-09-05 |
Questions
Does Simple In-Game Calculator need Fabric API?
Does the server need the calculator installed?
Which game version is supported?
More from andriyt2233
What the author says
Simple In-Game Calculator Simple In-Game Calculator is a lightweight and user-friendly mod for Fabric 1.21.4 that adds a fully functional calculator directly into the Minecraft interface. No more Alt-Tabbing or searching for your phone to calculate resources for your next big build or redstone farm. Compact Design…
Official listing
- Modrinth page
- modrinth.com/mod/simple-in-game-calculator
- Owner
- andriyt2233
- Published
- 2026-05-07
- Updated on Modrinth
- 2026-05-07
- Facts verified
- 2026-10-15