Calculated result
Adjust the editable example, then select Calculate.
Method and assumptions
Perimeter = 2 × (width + length). Add your extra binding length. Whole strips = ceiling(total binding length ÷ usable fabric width). Fabric cut width = strips × strip width. Raw yardage = cut width ÷ 36. Optional purchase rounding is always upward to the selected increment.
Worked example
A 58 × 66-inch quilt has a 248-inch perimeter. With 20 extra inches, 40-inch usable width, and 2.5-inch strips: 268 inches binding, 7 strips, 17.5 inches fabric, and 0.486 raw yards (0.5 yard rounded upward to 1/8 yard).
Limits of the estimate
Strip joins, angled seams, bias cuts, pattern matching, fabric defects, and project-specific finishing can increase actual fabric needs. Defaults are editable examples, not universal binding rules.
Privacy
Measurements and results stay in this browser tab. The calculator does not send input values, store them, or place them in the URL. No account or upload is required.