About Craft Calculators
Free calculators for the math that comes up at the workbench: how much resin to mix, how much fabric to buy, what an Etsy sale really pays.
What this site is
Craft Calculators is a small, independent project. Each page solves one practical problem for people who make things by hand, works in inches or centimeters where it matters, and is free to use without an account.
How the calculators are built
- The formula is on the page. Every calculator explains the math it uses, with a worked example you can check by hand.
- Figures that change are dated and sourced. Fees, rates and package sizes come from the company that sets them wherever it publishes them, otherwise from established industry references, and each page says when they were last checked.
- Each calculator is tested against its worked examples before it goes live, and again when it changes.
- Nothing you type leaves your browser. The calculations run on your device. See the privacy page for details.
Results are estimates
Materials, products and platforms vary. Treat every result as a well-reasoned starting point and follow the instructions on your product's label, your pattern or your platform's own statements.
Found a mistake or want a calculator?
Corrections and ideas for new calculators are welcome. Use the contact page and, for a mistake, include the numbers you entered.
Trademarks
Etsy is a trademark of Etsy, Inc. Craft Calculators is not affiliated with or endorsed by Etsy or any other company named on this site.