Calculate the batting rectangle and the length to cut from a roll. Use the edge allowance requested for your quilting process and the actual usable roll width.
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Add the allowance to both edges
Target width/length = top width/length + 2 × extra per edge. A 60 × 80 top plus 4 inches per edge needs 68 × 88, not 64 × 84. Confirm the allowance with your quilter.
Rotate the rectangle to compare roll cuts
A 90-inch roll covers the 88-inch dimension: cut 68 inches, about 1.89 yards, rounded to 2. A 72-inch roll needs an 88-inch cut, rounded to 2½ yards.
A 60-inch roll covers neither dimension. No single-piece cut fits; this tool does not join remnants.
Dimensions do not select the batting material
This checks size, not fiber, loft or quilting distance. Follow product guidance and use dimensions available after any required preparation.
Coordinate top, batting and backing
Include final borders. Calculate backing with its own allowance and binding from the outside edge.
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Questions about this calculation
Should batting and backing be the same size?
They may be, but the requirements depend on the process. Enter the allowance needed for each layer rather than assuming their dimensions must match.
Can the calculator join batting scraps?
No. It finds a single-piece roll cut with rotation allowed. If the usable width cannot cover either target dimension, it does not calculate a pieced alternative.
Does a queen-size package always fit a queen quilt?
No. Compare the package’s actual dimensions with the quilt plus its required edge allowance. Bed and package labels do not guarantee a fit.
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