About QuiltCraft Tools

QuiltCraft Tools is a small project with a simple goal: free, fast, honest quilting math. Most quilting calculators we found were either buried inside apps, outdated, or missing the explanations that tell you why the number is what it is. We built the tools we wanted to use.

Our standards

• Free forever. No sign-up, no paywall, no email required.
• Explained assumptions. Every calculator tells you the formula and the assumptions behind it, so you can adjust for your own methods.
• Built for quilters. Imperial and metric, common fabric widths, seam allowances where they matter.
• Private. Calculations happen in your browser. We never see your numbers.

Have a calculation you wish existed? The tools here are based on commonly used quilting formulas from industry-standard references. We're always adding more.