About YardageLab

YardageLab makes free, reliable fabric-math tools for people who sew and quilt. Buying too little fabric means a second trip and a dye-lot mismatch; buying too much wastes money. Our calculators exist to get that number right the first time.

What we believe

• Utility first. Every page is a tool you can use, not a wall of text wrapped around an ad.
• Show the work. We separate the exact mathematical result from a shop-friendly amount to buy, and we list our assumptions on every result.
• Tested math. Each formula is backed by a suite of automated golden tests and human review before it ships.
• Fast and calm. No pop-ups over the inputs, no layout shift, no sign-up.

How the numbers are made

Read the calculation methodology for the exact formulas and rounding rules, and our editorial policy for how we research and review each tool.

Spotted something off? Tell us — corrections from real makers make these tools better.