Quilt Binding Calculator — Strips & Fabric

For double-fold binding (most common), cut strips 6–6.5cm wide — 6.35cm is the 2.5-inch quilting standard. Folded in half and machine-sewn, this finishes at approximately 6mm–1.25cm (about ¼–½ inch) on the front, depending on the seam allowance you use (a ¼-inch/6mm seam gives the narrower ¼-inch finish). For single-fold binding, 4cm strips give about 1cm finished binding.

Join strips at 45-degree angles (diagonal seams) for a smooth transition. Place two strips right sides together at right angles, draw a diagonal line, sew along it, trim to 0.6cm, press open.

Add 25cm to the perimeter for joining the strips, negotiating corners, and overlapping the start/finish. This calculator includes this extra automatically.