Quilting Math Shows Its Working

Field notes

The calculators expose variables that quilting tools often hard-code, including usable fabric width, backing overhang, binding strip width, and the seam allowance measured on a particular machine. Outputs include cut lists, fabric quantities, strip counts, and printable planning grids. The half-square-triangle calculator shows both the derived formula and the rounded ruler-friendly convention behind “add seven eighths,” while the backing tool compares fabric orientation rather than assuming one direction.