Quilt Binding Calculator

Add up the perimeter of your quilt (2 × width + 2 × length), then add 10–15 inches for seam overlap and joining the ends. Divide that total by your usable fabric width (usually 40–44 inches) to get the number of strips, then multiply by the strip width to find the total inches of fabric needed. Divide by 36 to convert to yards.

The most common binding strip width for double-fold binding is 2.25 to 2.5 inches. Wider strips (2.5") are easier for beginners and work well for thicker quilts, while 2.25" strips give a slightly narrower finished edge. Single-fold binding typically uses strips around 1.25–1.5 inches wide.

Diagonal seams (cut at a 45-degree angle) are the preferred method because they distribute bulk more evenly and are less noticeable on the finished quilt. Straight seams are simpler to sew but create a slightly bulkier ridge where strips join. Both methods are fully functional — it's a matter of preference and skill level.

You need extra binding to account for the seam allowances where strips are joined, turning the corners of the quilt, and creating a neat overlap where the two ends of the binding meet. Most quilters add 10–15 inches as a safety buffer; 12 inches is the standard recommendation.

WOF stands for Width of Fabric — the measurement from selvedge to selvedge across the bolt. After washing and trimming selvedges, standard quilting cotton is usually 40–44 inches wide. This usable width determines how long each binding strip is, which controls how many strips you need to cut.

Yes — it's always wise to buy slightly more than the minimum calculated yardage. Fabric can shrink when washed, and cutting errors happen. A common rule of thumb is to round up to the nearest 1/8 or 1/4 yard. The calculator's 'Recommended Yardage' adds a small buffer for this reason.

This calculator is designed for straight-cut (WOF) binding, which is the most common type. Bias binding is cut diagonally across the fabric grain and requires more yardage for the same total length. If you plan to use bias binding, use the total binding length from this calculator but consult a dedicated bias binding yardage chart for the adjusted fabric amount.

The perimeter is the total distance around the outside edge of your quilt — calculated as 2 × width + 2 × length. Since binding wraps around all four edges, your binding must be at least as long as the perimeter. Extra inches are added on top for seams and joining.