Sewing Calculators
Free sewing calculators.
Dart fitting, button spacing, elastic length, and more.
Button Spacing Calculator
Calculate even button spacing for any number of buttons over a given length. Get exact positions from top and bottom.
Elastic Length Calculator
Calculate the unstretched elastic length needed for a waistband, cuff, or any garment opening. Avoid too-tight or too-loose results.
Sewing Dart Calculator
Calculate dart width and depth for garment fitting. Get the intake needed to shape flat fabric to body curves.