Cast On Gauge Calculator: a free Claude skill

A small skill that turns your swatch into gauge, shows how big your project will really be, and works out how many skeins to buy.

• Your real finished size
• Needle change or new cast-on count
• Skeins to buy, with a spare

Made by Cast On, part of What If Labs.

Install it

1. Download cast-on-gauge-calc.zip (don’t unzip it).
2. In Claude on the web or desktop, open Customize, then Skills, click +, choose Upload a skill and pick the ZIP.
3. Make sure code execution is on in Settings, Capabilities. It works on any Claude plan, including the free one.
4. Ask Claude something in plain words. It picks the skill up on its own.

Using Claude Code instead? Copy this folder into ~/.claude/skills/.

Try a free tool first

No Claude needed: the Knitting Gauge Calculator and Cast-On Count runs in your browser and shows its working.

Want the whole thing?

The Cast On Pattern Helper is $15, one time, with a 14-day refund. Gauge, sizing, yarn and pattern help in one.

• Gauge math and finished sizes
• Pattern resizing
• Evenly spaced increases and decreases
• Yarn substitution and skein counts
• Simple pattern design
• Abbreviations, charts and fixes
• Project tracking
• Updates for a year

License

MIT. Use it, change it, share it. Please keep the credit to Cast On.