Quilt Size Calculator

Sashing strips sit only in the gaps between blocks, and a row of blocks has exactly one fewer gap than it has blocks — five blocks across means four gaps between them, not five. This calculator uses that count when adding up total sashing width, which is also why setting sashing width to zero simply removes all the gaps and pushes blocks flush against each other.

It adds 8 inches to each dimension, because the border wraps around both sides — top and bottom for length, left and right for width — and each side gets the full border width. A quilt with a 40-inch inner area and a 4-inch border finishes at 48 inches in that dimension, not 44.

No — it's simply the finished quilt's width times length converted to square feet, useful as a rough size reference. Real batting and backing purchases are typically cut several inches larger than the finished quilt top on every side to allow for the quilting process, which pulls the layers in slightly, so shopping lists for those materials should add that margin rather than using this area figure directly.

Blocks across scales the finished width and blocks down scales the finished length independently, so an uneven block count — say, five across but seven down — produces a rectangular rather than square quilt. This is the standard way quilters plan a longer bed-runner shape versus a more square wall-hanging layout from the same block size.