Circle Sewing Calculator

Sewing circles to a straight side panel is where most round projects go wrong. Cut the panel a little short and the circle won't fit. Cut it a little long and the seam puckers. This free calculator does the math and makes creating circle sewing patterns for bags, baskets, cushions, poufs, bolsters and bucket hats a breeze.

Enter your circle's diameter or radius and pick a project. You get exact cut sizes with seam allowance added, how much fabric to buy, and a full-size PDF pattern for Letter or A4 paper.

in

Cut list

    Cut line Stitch line Letters match the cut list

    Printable pattern

    Print every piece at full size, tape the pages together, and use them as your cutting templates. Rectangles include notches for matching the circle and, on bags with handles, boxes showing where to sew the handles.

    Show the math
      Sewing tips for this project