Quilt Backing Calculator
Calculate fabric requirements for quilt backing including piecing and allowances
About this calculator
The Quilt Backing Calculator helps quilters determine exactly how much fabric they need for their quilt backing, including necessary allowances and piecing requirements. This tool eliminates guesswork and prevents costly fabric shortages by calculating precise yardage based on your quilt dimensions and fabric width. Whether you're planning a simple backing or need to piece multiple fabric panels together, this calculator ensures you purchase the right amount of backing fabric for your quilting project.
How to use
Enter your finished quilt dimensions (length and width) and select your backing fabric width (typically 42", 60", or 108"). The calculator will determine if piecing is needed and display the total fabric yardage required, including standard allowances for quilting shrinkage and trimming.
Frequently asked questions
How much extra fabric allowance should I add?
Standard practice is adding 4-6 inches on all sides, which this calculator includes automatically for proper quilting allowance.
When do I need to piece my quilt backing?
Piecing is required when your quilt width exceeds your fabric width minus seam allowances and shrinkage considerations.
Can I use different fabric widths for backing?
Yes, the calculator works with standard fabric widths including 42", 60", and 108" wide backing fabrics.