108-inch wideback calculator
Check whether wide backing removes the seam—and how much to buy.
Enter the finished quilt size and overage. The calculator tests both fabric orientations using 108-inch backing.
Wideback result
—yards to buy
—panels
—fabric direction
Compare standard-width fabric.
The main calculator shows whether 42- or 44-inch panels use less or more total length.
Compare fabric widths →Wideback removes seams only when usable width covers the required span.
The default usable width is 106 inches after a two-inch selvage allowance. Directional prints may prevent rotating the layout even when rotation uses less yardage.