Bias Tape Calculator
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Estimate continuous bias tape yield from a square of fabric and your strip width.
Square & strip width
Bias tape length
162 in
From 18 in square, 2 in strips
- Yards
- 4.5
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Continuous bias tape
Bias tape is cut on the 45° grain so it stretches smoothly around curves. The continuous-bias method sews a square into a tube and spirals one long strip — far less waste than cutting individual strips.
Approximate yield equals the square's area divided by strip width. A 18-inch square cut into 2-inch strips yields roughly 162 inches of bias before seam losses — about 4.5 yards.
Example: 15-inch square, 2-inch strips → 15 × 15 ÷ 2 = 112.5 inches (~3.1 yards). Add extra for seam joins and trimming.
Common questions
Why cut on the bias?
Fabric on the bias (45° to the grain) has more stretch and drapes around curves — ideal for binding necklines, armholes, and quilt edges.
Does this include seam allowances in strip width?
Enter your finished binding strip width before folding. If you cut wider and fold in half, use the cut strip width that produces your desired finished binding.