Crafting Calc – know what you still need.
Every crafting session starts with the same question: what am I missing? Crafting Calc answers it. Pick an item, set an amount, and you get the complete recipe tree with a have/need count on every step – green when covered, red when not.
The checklist that follows you
Pin a calculation and it stays on screen while you play, including inside your inventory, the crafting table and chests. It recalculates live, so lines turn green as you gather, and a finished recipe removes itself.
Reverse mode
Have 34 iron and wonder how many hoppers that is? Switch the mode, pick the ingredient, read the answer.
Works with your mods
Crafting Calc reads every recipe the server sends to the client, so items, blocks and recipes from other mods are included without any configuration. Furnace steps stay as raw materials, and recipe cycles (ingots, blocks and nuggets) are detected so the numbers stay honest.
Item picker
Browse items in the same categories as the creative inventory, with their icons, or use the search field which covers German and English names.
Settings
A gear button opens the settings: where the checklist sits on screen (3x3 grid), one list at a time or all stacked, recipe items or raw materials, and whether the list shows up in containers.
Controls
C – open the calculator
H – show or hide the checklist
V – next pinned recipe (Shift+V for previous)
Client side only
Nothing is installed on the server, no network access, no telemetry. Your pins and settings are stored locally in config/craftcalc-pins.json and config/craftcalc-settings.json.
Requirements
Minecraft 1.21.1
NeoForge 21.1.x
Java 21

