Craftulator
Craftulator is a client-side chat calculator for NeoForge that evaluates a math expression typed after calc and prints the result in bold.
What it does
Typing calc followed by a math expression in chat makes the mod evaluate it at once and print the answer in bold. Addition with +, and parentheses for grouping, are the operations named by the author. The mod is useful for quick sums while playing, such as building or counting redstone and resource amounts, without leaving the game to open a calculator app.
Craftulator is a small mod with no dependencies beyond NeoForge itself. Because it runs only on the client, the server does not need it, and players can use it in singleplayer and on multiplayer servers alike. The code is released under the MIT License and is not open source. Files exist for 1.21.1 only, with 1.21.1 for 1.21.1 as the latest NeoForge file, published on 2026-07-30.
Key features
Chat calculation
Type calc followed by an expression in the chat box to get the result printed back in chat.
Addition
The + operator adds numbers within a single calc expression.
Parentheses grouping
Parentheses group parts of an expression so they are evaluated first.
No alt-tabbing
Quick math runs inside the game window, so the player keeps their place in the world.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Resource counts
Adding up stacks or amounts of materials while gathering or crafting.
Redstone and building
Working out quick numbers for circuit or build measurements during play.
Who it’s for: Players on NeoForge 1.21.1 who want a calculator inside the chat window. Only the client needs the mod, so server owners do not have to install it.
Questions
Does Craftulator need any other mods?
Does the server need Craftulator installed?
Which Minecraft versions does Craftulator support?
In the catalog
Craftulator is one of 8,499 Technology mods on ModsFinder, and one of 3,557 Technology mods for NeoForge. 32,366 mods support Minecraft 1.21.1.
More from BlockinCreations
Similar mods
What the author says
A tiny, dependency-free client-side mod that turns your chat into a Calculator. Sometimes you just need to do quick math while playing — building, redstone, resource counts — without alt-tabbing out of the game and running Calculator app.
Official listing
- Modrinth page
- modrinth.com/mod/craftulator
- Owner
- BlockinCreations
- Published
- 2026-07-30
- Updated on Modrinth
- 2026-07-30
- Facts verified
- 2026-10-15