How do I install Calculator - Item Calculator?

Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. Download the .jar. Put it in the .minecraft/mods folder and launch that loader profile. Opens on Modrinth — not every file is mirrored on our own servers.

What Minecraft version does Calculator - Item Calculator work with?

The listing gives Minecraft 1.21.1, 1.21.2, 1.21.3, among others. This is the version stated by the author or source site, not something we verified ourselves.

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Calculator - Item Calculator

by Mightyyy · on Modrinth

Which Minecraft do you have?

Every version of the game needs its own build. Pick yours, then download — the wrong build installs fine and then does nothing in the game. This mod is built for Fabric only.

Minecraft 1.21.1–1.21.11Newest
Minecraft 1.20.4–1.20.6
Minecraft 1.20.1–1.20.3

⬇ Download for 1.21.1–1.21.11 ⬇ Download for 1.20.4–1.20.6 ⬇ Download for 1.20.1–1.20.3

I don't know my version or loader

Open the Minecraft launcher and look at the profile you play on — it names both, like fabric-loader-1.21.4. The version also shows in the bottom-right corner of the game's main menu.

No loader in the profile name? Then it's plain Minecraft, and these mods won't run — you need Fabric or NeoForge installed first.

Open in MC Java Mods Get it on Google Play →

Item Calculator adds a full calculator directly to the Minecraft inventory.
Open your inventory and click the centered > tab on its right edge. A
Minecraft-styled calculator smoothly slides out while your inventory remains
visible and usable.
Features
Full on-screen number and operator keypad
Addition, subtraction, multiplication, and division
Decimal numbers, negative values, and parentheses
Equals, clear, and delete controls
Physical keyboard and numpad input
Toggleable calculation history
Clear-history control
Smooth inventory-attached slide animation
Correctly follows the inventory when the recipe book moves it
Client-side only; servers do not need to install the mod
How To Use
Open the player inventory.
Click the > tab centered on the inventory's right edge.
Enter a calculation using the on-screen keypad or your keyboard.
Press = or Enter to calculate the answer.
Click HIST to view previous calculations.
Supported Versions
Fabric 1.20.1
Fabric 1.20.4
Fabric 1.20.6
Fabric 1.21.1
Fabric 1.21.4
Requirements
Fabric Loader
Fabric API
Install the JAR matching your exact Minecraft version.

Quick facts

Edition: Minecraft Java
File type: .jar
Minecraft versions listed: 1.21.1, 1.21.2, 1.21.3
How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.

Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.

Verified by MCModsHub

Ships as item-calculator-fabric-1.21.1-0.1.0.jar — drop this file into the mods folder
Download size: 13 KB
Download link checked 11 Sept 2026 — working

These come from our own check of the pack file, not from the source page.

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