Zipper Length Calculator

Find the right zipper length for your project based on opening size and garment type.

Opening Length (inches)

Garment Type

Zippers come in standard lengths: 4", 7", 9", 12", 14", 16", 18", 20", 22", and longer.

When between sizes, always round up. A longer zipper is easier to shorten than extend.

Choose invisible for dresses, separating for jackets, and heavy-duty for bags and outdoor gear.

Calculate how much fabric you need for sewing projects. Account for pattern pieces, fabric width, and directional prints. Free tool.

Calculate quilt dimensions, number of blocks, and sashing requirements. Plan quilts for any bed size. Free tool.

Calculate binding strip length and fabric needed for your quilt. Supports straight grain and bias binding. Free tool.

Calculate batting dimensions needed for your quilt. Account for shrinkage and overhang. Compare batting types. Free tool.

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