What this workbench does
Plan a gathered strip with seams, joins and a chosen fullness ratio.
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
Gather a short sample onto a measured edge and choose the ratio by appearance before calculating the full project.
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.