Quilt Binding Calculator Estimate Fabric Needs for Your Quilt
Quilt Binding Calculator
Find out how many binding strips to cut and how much fabric to buy.
This calculator helps you determine how much fabric is needed to bind your quilt based on its width, length, and the desired binding strip width. It offers two different calculation options:
- "Regular" binding – This method involves cutting the binding strips parallel to the width of the fabric on a bolt.
- Bias binding – With this method, the binding strips are cut along the bias of the fabric.
To use the calculator, enter the fabric width (which is set to 43 inches by default), the width and length of your quilt, and the preferred binding strip width. Based on these measurements, the calculator determines:

- The total length of binding required, which is equal to the perimeter of the quilt.
- The amount of fabric needed to cut the binding strips.
- The number of strips that need to be cut from the fabric (for "regular" binding only).
Note on Flange Binding: Flange binding is made by sewing two fabric strips together along their long edges, and each strip can be made from a different fabric. One strip is 1/4" wider than the other to accommodate the seam allowance when the two strips are joined. If you are planning to make a flange binding and want to calculate the required yardage, use the binding calculator twice, once for each strip. Make sure to enter the appropriate binding strip width for each fabric strip.
"Regular" Binding Calculations
Total binding length (inches) =
Number of strips to cut =
Binding Yardage =
Bias Binding Calculations
Bias strips are cut diagonally from a square or rectangular piece of fabric, as illustrated in the diagrams on the right. The calculator determines the amount of fabric required using two different methods:
- For a square: The calculator determines the required dimensions of the fabric square needed to cut the bias binding strips.
- For a rectangle: The calculator calculates the amount of fabric yardage to cut from a bolt, based on the fabric width entered above.
For both methods, the calculator includes an additional margin in the calculation to help ensure that enough fabric is available. This also prevents you from having to cut bias strips all the way to the corners of the square or rectangle, where the resulting strips would be very short and less practical to use.
Total binding length (inches) =
Square Size (inches) =
Yardage to be Cut from Bolt =
FAQs
Conclusion
This quilt binding calculator makes it easier to estimate the fabric needed to finish your quilt neatly and efficiently. Whether you choose regular binding or bias binding, it helps calculate the total binding length, required fabric yardage, and number of strips to cut. By entering accurate quilt measurements and selecting the right binding strip width, you can plan your project with greater confidence, reduce fabric waste, and achieve a clean, professional-looking finish.
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