How accurate is this result?

It is a practical planning estimate based on the visible assumptions. Product specifications and real-world conditions can vary.

Can I change the assumptions?

All editable assumptions appear as calculator inputs. Fixed assumptions are listed on the page.

Rechner

Seam Allowance Calculator

Add seam allowances to rectangular pattern-piece dimensions.

Answer with the example values

Cut Length: 63 · Cut Width: 43

Formula: Add seam allowances to rectangular pattern-piece dimensions. The method uses the entered values in consistent units and rounds only the final purchase quantity.

Assumptions: Adds the allowance to both sides of each dimension.

Werte eingeben und anschließend berechnen.

Your answer and the practical quantities behind it will appear here.

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Formel und Methode

Add seam allowances to rectangular pattern-piece dimensions. Berechnen Sie, was Sie brauchen, wie viel Sie brauchen und was Sie kaufen sollten.

Annahmen und Grenzen

Adds the allowance to both sides of each dimension.

Rechenbeispiel