How to calculate it
Binding length = 2 × (quilt width + quilt length) + finishing allowance. Divide by usable fabric width and round up to whole crosswise strips. Strip count × cut strip width ÷ 36 gives yardage, before pattern matching.
Worked example
For a 60 × 72 in quilt with 12 in extra, plan 276 in of binding. At 42 in per strip, cut 7 strips. Seven 2½ in strips take 17½ in of fabric length, about ½ yd.
Before you cut or buy
- Diagonal joins use some binding length; increase the finishing allowance for complex corners or joins.
- This is for crosswise strips, not bias binding. Check the chosen strip width against your batting loft and binding method.
Common questions
Does the estimate include fabric for joining binding strips?
The adjustable finishing allowance adds length for joins and the final overlap. If you use diagonal seams, a large quilt or a binding technique needing long tails, raise that allowance before cutting strips.
Is the result for bias binding?
No. It estimates crosswise strips cut across the usable fabric width. Continuous bias binding needs a different layout and yardage calculation.
Use your own measured materials and pattern instructions. Estimates cannot account for every variation in technique, shrinkage or layout.