Bias tape is cut diagonally so it stretches around curves. A square of fabric yields a surprising length of continuous bias strip.
Length = A ÷ Wᵒ
What the terms mean
| Symbol | Meaning |
|---|---|
| Length | Total bias length, in inches |
| A | Fabric area, in square inches |
| Wᵒ | Strip width, in inches |
Worked example
An 18 by 18 in square is 324 in². Cut into 2 in strips it yields 324 ÷ 2 = 162 inches of bias tape.
Continuous bias saves fabric. The continuous-loop method turns a single square into one long strip with far less waste than cutting separate diagonal pieces.
See the Bias Tape Calculator and the Seam Allowance Calculator.