Quilting Calculators
Quilt sizing, binding, backing, blocks, sashing, borders and batting calculations.
Quilt Size Calculator
Calculate quilt dimensions for standard bed sizes with drop allowances.
Quilt Binding Calculator
Calculate binding strip fabric and length for finishing quilts.
Quilt Backing Calculator
Work out backing fabric needed with seaming for wide quilts.
Quilt Block Calculator
Calculate number of blocks and fabric for a quilt layout.
Strip Piecing Calculator
Calculate strip quantities for strip-pieced quilt blocks and designs.
Half Square Triangle Calculator
Calculate fabric and cutting sizes for half-square triangle units.
Fat Quarter Calculator
Work out how many pieces you can cut from fat quarters.
Quilt Batting Calculator
Calculate batting size needed with overhang for quilting.
Sashing Calculator
Calculate sashing strip quantities and fabric for quilt layouts.
Border Calculator
Calculate fabric needed for single or multiple quilt borders.
10 free calculators in Quilting
Quilting Calculations and Fabric Planning
Quilting involves precise fabric calculations to ensure you have enough material for the quilt top, backing, binding and batting. Standard UK quilt sizes range from cot quilts (100cm × 120cm) to super king (260cm × 260cm), with drop allowances typically adding 30–40cm per side.
Quilting cotton is typically 112cm (44") wide on the bolt. For quilt backing wider than the bolt, you need to piece the backing with a horizontal or vertical seam. Our quilt backing calculator works out the total meterage accounting for seaming and a 10cm overlap on each side for quilting frame grip.
Binding is cut from strips (typically 6.5cm wide for double-fold binding) joined together. You need enough binding to go around the entire quilt perimeter plus approximately 25cm for joining and corners. Fat quarters (50cm × 56cm pieces) are popular for variety in quilt blocks — our fat quarter calculator shows how many usable pieces you can cut from each one.