Free sewing & quilting calculators

Free calculators for sewing and quilting

Fast, accurate answers to the fabric-math questions every sewist hits — how many yards, how many strips, how many widths. No sign-up, nothing to install.

• Fabric Yardage Calculator

  How many yards to buy — from your piece size, piece count, and the width of the bolt, with a shrinkage allowance built in.

• Quilt Backing Calculator

  Backing yardage for your quilt top, including the overage a longarm needs — and which way to run the seams to buy less fabric.

• Quilt Binding Calculator

  How many strips to cut and how much fabric they take, counting the mitred corners and the fabric every diagonal join swallows.

• Curtain Fabric Calculator

  Yardage for curtains from your rod width, drop, and fullness — with multiple widths per panel and pattern repeats handled.

Why fabric math matters

Fabric is the one supply you can't un-cut. Buy too little and the dye lot may be gone when you go back for more; buy too much and quilting cotton at twelve dollars a yard adds up fast. The math itself — how many pieces fit across the bolt, how many cutting rows that means — is simple but tedious, and a small mistake compounds across a whole project. These calculators get the numbers right in seconds, using the same row-counting approach cutting tables use.

They also count the things quick estimates leave out: the half inch every seam eats when you piece a backing, the three inches a diagonal join swallows on binding, the whole pattern repeat you pay for on every curtain cut. Those are the details that turn "about four yards" into a second trip to the shop.

Everything runs instantly in your browser — your projects never leave your device.