What this workbench does
List top, bottom and continuous boxing-strip dimensions for a rectangular cushion.
It combines an editable calculator, baseline comparison, one-input sensitivity chart, transparent formulas, worked examples and a printable measurement sheet.
How to assess the result
Check the closure and piping plan before cutting. Mark top and bottom orientation for directional fabric.
The calculations implement the stated geometric or arithmetic model. They are estimates where real materials, equipment or processes differ from that model. The specific assumptions are listed on the calculator and reference pages.
Version
Workbench release 1.0 · 3 November 2026. Calculated examples and shared numeric engine checked automatically. Real-world project performance has not been independently certified.