Practical guide
How to reduce fabric waste
The best saving happens before the first cut.
A reliable method
Group pieces by size, compare orientations only when allowed, and label useful remnants. Compare several roll widths before buying. A lower waste percentage is not always cheaper if wider fabric has a much higher price.
Use the calculation in practice
The optimizer reports used length and estimated waste.
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Fabric, pattern and finishing instructions take priority over a general online estimate.