Chat Calc

Chat Calc

The *fastest* calculator around; built right into your chat; just type in and you'll see your answer!

by
371.8K Downloads
fabricutility
Configure a Compatible Minecraft Server

About this Mod

This is a port of ChatCalc by RTTV (which is also a port of ChatCalc by Kokeria) to the newest minecraft versions, because it hasn't been updated in a long time. It's also completely converted from Java to Kotlin, just because I can.

The functionality hasn't changed much, so you can check the original mod's description. There is, however, an additional dependency - Fabric Language Kotlin - which is needed for Kotlin to work.

I do plan on adding some features later, such as better config handling and allowing calculations in text fields other than chat, like signs (done), books, anvils etc. They aren't available yet, though. If there's anything else that you want to see in the mod, please create an issue on github.


Available Versions

Chat Calc 4.2.5release
MC 1.21.10fabric
October 15, 2025
Chat Calc 4.2.4release
MC 1.21.9fabric
October 3, 2025
Chat Calc 4.2.3release
MC 1.21.8fabric
October 3, 2025
Chat Calc 4.2.2release
MC 1.21.7fabric
July 3, 2025
Chat Calc 4.2.1release
MC 1.21.6fabric
June 23, 2025

How to Install Chat Calc on Your Client

1

Install the Mod Loader Locally

Install fabric for your local Minecraft version.

2

Download the Matching File

Choose the Chat Calc file for fabric and Minecraft 1.21.10.

3

Install Mod

Place the .jar file in your local .minecraft/mods folder and restart Minecraft. No server-side installation is required.

Compatibility

Mod Loaders

fabric

Minecraft Versions

1.21.10, 1.21.9, 1.21.8 (+10 more)

Server-side

Unsupported

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

Does Chat Calc need to be installed on the Minecraft server?

No. Modrinth marks Chat Calc as unsupported on the server side. Install it only in your local Minecraft mods folder. Your server can remain unchanged unless the mod page lists an additional dependency.

Which version and loader does Chat Calc require?

Use a file for fabric and your exact Minecraft version. Supported versions include 1.21.10, 1.21.9, 1.21.8. Files for different loaders are not interchangeable.

Chat Calc is not working – what should I check?

First check the Minecraft version, loader version and required dependencies. Put the .jar file in your local .minecraft/mods folder and remove older duplicates. Because this mod is client-side, adding server RAM will not fix it.

Minecraft Server for Your Group

Chat Calc stays on your client. Host a compatible world for your group.

Recommended RAM
4 GBfrom €5.2/mo
Minimum 3 GB | per 8 players
Create Server Now
Client Compatibility Guide
NVMe SSD Storage
DDoS Protection included

Details

License
Mozilla Public License 2.0
Server-side
Unsupported

Supported Versions

1.21.101.21.91.21.81.21.71.21.61.21.51.21.41.21.31.21.21.21.1+3 more