
Modrinth · Minecraft mod
Chat Calc
The *fastest* calculator around; built right into your chat; just type in and you'll see your answer!
Quick answer
Which Chat Calc release should I use?
Chat Calc 4.2.5 targets 1.21.10 with Fabric. It must be installed on the client. Do not install it on the dedicated server. All 2 required mods have matching files.
Where it goes
Is Chat Calc required on the client, server, or both?
It must be installed on the client. Do not install it on the dedicated server.
This file is marked client-only.
What else does Chat Calc 4.2.5 need?
4.2.5. Change the file and its required mods may change too.
Install Fabric Language Kotlin, Fabric API first. We found matching files for this game-version and loader setup.
We only count dependency files that match this setup. A file for another loader does not fill the gap.
Before you install it
Add Chat Calc without breaking your instance.
Built for Chat Calc 4.2.5. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use 4.2.5. It targets 1.21.10 with Fabric; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
Install Fabric Language Kotlin, Fabric API first. We found matching files for this game-version and loader setup.
- 03
Put it on the correct side
It must be installed on the client. Do not install it on the dedicated server.
- 04
Pick the file you checked
Use the “Get this file” button beside 4.2.5. It opens that exact file at the source.
About this project
What does Chat Calc add?
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.
Project description from Modrinth.
Pick your setup
Chat Calc by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
1.21.10
1 loader build1.21.9
1 loader build1.21.8
1 loader build1.21.7
1 loader build1.21.6
1 loader build1.21.5
1 loader build1.21.4
1 loader build1.21.3
1 loader build1.21.2
1 loader build1.21.1
1 loader build1.21
1 loader build1.20.6
1 loader buildShowing the newest 12 of 13 game versions. Older files are in the list below.
Check the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Chat Calc versions and loaders
4.2.5
chatcalc-4.2.5.jar
15 Oct 2025
4.2.4
chatcalc-4.2.4.jar
3 Oct 2025
4.2.3
chatcalc-4.2.3.jar
3 Oct 2025
4.2.2
chatcalc-4.2.2.jar
3 Jul 2025
4.2.1
chatcalc-4.2.1.jar
23 Jun 2025
4.2.0
chatcalc-4.2.0.jar
23 Jun 2025
4.1.10
chatcalc-4.1.10.jar
25 Mar 2025
4.1.9
chatcalc-4.1.9.jar
24 Dec 2024
4.1.8
chatcalc-4.1.8.jar
5 Dec 2024
4.1.7
chatcalc-4.1.7.jar
29 Oct 2024
4.1.6
chatcalc-4.1.6.jar
2 Sept 2024
4.1.5
chatcalc-4.1.5.jar
6 Aug 2024
Looking for an older file? The official Modrinth project page is in Resources.