Bias Tape Yardage Calculator
Calculate how much fabric you need to cut bias tape or bias binding for a project.
Enter the total tape length needed and finished tape width.
What Is Bias Tape? Bias tape is fabric cut at a 45-degree angle to the straight grain. Because fabric stretches along the bias, bias tape can bend around curves without puckering — making it ideal for curved necklines, armholes, quilt binding, and decorative edging.
Cutting Width vs Finished Width Single-fold bias tape: cut 4x the finished width. Double-fold bias tape (most common): cut 4x the finished width (fold in half twice). Example: for 1/2" double-fold tape, cut strips 2" wide.
Calculating Fabric Needed From a square of fabric cut on the bias, you can get a very long continuous strip. The formula: strip length = (fabric area) / cut width. For a 15" square: area = 225 sq in. At 2" cut width: 225/2 = 112.5" of tape (about 3 yards).
Joining Strips Join bias strips with a diagonal seam (not straight across) to distribute bulk. Press seam open. Always add 10% extra for joining waste and beginning/end overlaps.