Sewing & Garment Calculators

These tools cover garment and piecework measurements: circle-skirt radius, rectangular cutting layouts, seam allowances, pattern scale, and a simple fabric cost check.

Each calculator states its construction assumptions. Where a sewing method has more than one common practice, the input stays editable instead of being presented as the only correct value.

Circle Skirt Calculator

Find the seam-line radius and the inner and outer cut radii for a quarter, half, full, or double circle skirt.

Fabric Yardage Calculator

Lay out rectangular pieces on a usable fabric width, with an optional vertical repeat and an explicit rotation choice.

Pattern Scaling Calculator

Scale a pattern measurement from an original and a target, or from a print percentage.

Seam Allowance Calculator

Add a separate allowance to each edge of a finished rectangle to get the cut size.

Fabric Cost Calculator

Add waste, round the quantity up to a purchase increment, then apply your price and tax.