Gather Calculator — Fabric for Gathered Sections

Light gathers: 1.5x. Medium gathers: 2x. Full gathers: 2.5-3x. The ratio depends on fabric weight — lightweight fabrics (chiffon, voile) look best with higher ratios (2.5-3x); heavier fabrics need less (1.5-2x).

Sew two rows of long basting stitches (4mm+) within the seam allowance. Pull the bobbin threads from both ends to draw up the fabric evenly. Pin at regular intervals to distribute gathers before sewing the final seam.

Gathering creates one row of fullness at a seam line. Shirring uses multiple rows of elastic thread to create stretchy, gathered fabric over a wider area. Shirring typically uses 2-3x fullness.