Results
Configure settings and press Calculate
The pleat depth is fixed. The number of pleats is chosen to best match the target gap:
The actual gap is then calculated to divide the finished width exactly across all n−1 gaps, so the curtain always comes out at the right width:
A warning is shown if G_actual differs from the target by more than 40%.
The total flat fabric required to produce the finished curtain is:
Every pleat folds 2×depth of flat fabric. The gaps lie flat between pleats.