How to Calculate Quilt Fabric Cost
Buying too little fabric is every quilter's nightmare. Buying too much means money sitting folded on a shelf. This calculator gives you a precise yardage and cost estimate before you ever walk into the fabric store.
What Goes Into the Estimate
The calculator works by dividing your finished quilt dimensions into blocks, distributing those blocks evenly across the number of colors or fabrics you plan to use, then converting block area into yardage. It accounts for seam allowances (adding a standard 0.5 inch to each block dimension before computing area) and a waste/shrinkage percentage (15% is the industry-standard starting point, though beginners often benefit from bumping this to 20%).
Standard Fabric Width
Most quilting cotton sold in the US is 44 inches wide. The calculator uses 44 inches as its basis. If you're working with wider home-dec fabric or a narrower specialty print, your actual yardage requirement will differ.
Round Up at the Store
Fabric is typically sold in quarter-yard increments. The calculator already rounds each color to the nearest quarter yard to reflect real purchasing units. Still, it's worth adding one extra quarter yard per color as a safety margin — especially for prints that are hard to match if you run short mid-project.
Backing and Binding
This calculator covers only the quilt top (the patchwork front). For a complete project budget, remember to add yardage for the backing fabric (typically quilt width + 8 inches by quilt length + 8 inches) and binding strips (usually 2.5 inches wide, total length equal to the quilt perimeter plus 12 inches for joining). Batting is sold by the package or by the yard and is priced separately.