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Rolls
On a roll, what you pay for is the length you unroll. NestSmart packs panels across the roll’s width so each job consumes the least roll length, and reports that length as its headline figure.
Free, with no account needed.
How it is solved
Minimizing leftover area is the wrong goal for roll goods. Two panels 55″ wide and 80″ long on a 120″ roll should sit side by side and use 80″ of roll, not one after the other for 160″. NestSmart’s roll solver is built to find the side-by-side layout, and that exact case is a permanent test: a change that broke it would not ship.
Rolls are planned the way they are cut: full-width cross-cuts first, to take a band off the roll, then cuts within the band. Pieces that share a length end up beside each other in one band.
When several layouts use the same roll length, the one that leaves more continuous full-width material is preferred. The roll you still have is drawn to its full length, so a half-used roll never looks like an empty one.
What you control
Keep each panel as entered, or allow a 90° turn where the material has no direction. Panels are never turned end for end, so pile, nap and prints keep their direction.
Least roll length is the default measure for rolls. A priority of fewest stock pieces is read as least length, because on a roll they are the same question.
Enter panel widths and drops as fractions or decimals, in inches or metric. Sizes are kept exactly, with no rounding between your order and the cut.
Plan against the roll remainders you actually have, or leave the quantity blank for as many rolls as the job needs.
Set the smallest piece worth keeping. Leftover full-width tails and side pieces at least that size are marked on the plan.
Through the API, a roll can carry a selvedge on each side and a cut gap between pieces, both accounted for separately from waste.
A real job
Seven shade panels for three rooms, fabric orientation fixed so the weave runs the same way on every window. All seven panels come from 228″ of a 98″ roll, packed in bands across the width, with the rest of the remainder still on the roll.
Stock: 98″ wide × 25′ roll remainder, knife cut. Every figure is read from the solve shown at the top of this page.