Quilt Binding Length Calculator
Running short of binding on the last side of a quilt is one of the most avoidable frustrations in quilting, and this binding length calculator makes sure it does not happen. Enter the finished width and length of your quilt along with an overlap allowance for corners and the closing join, and the tool adds up the perimeter and the allowance to tell you exactly how much continuous binding strip to prepare. The perimeter is simply twice the sum of the width and the length, since a rectangle has two of each side, and the allowance covers the extra length used turning the four corners and overlapping the two ends where they meet. The result is given in both inches and feet so you can plan your fabric cuts with confidence. From the total strip length you can work out how many strips to cut and how much yardage you need by dividing by your fabric width and multiplying by your binding cut width. Because quilt sizes and the allowance quilters prefer vary, every input is fully editable rather than fixed. The method follows the standard perimeter-plus-allowance formula shown below, with a worked example that reconciles exactly to the calculator defaults so you can check it yourself before cutting.
Binding length is the quilt perimeter plus an allowance: length = 2 x (width + length) + overlap. A 60 x 80 inch quilt with a 10 inch allowance needs 290 inches of binding, about 24.17 feet.
Quilt binding length formula
Length = 2 x (W + L) + A
Feet = Length / 12
W = quilt width in inches
L = quilt length in inches
A = overlap allowance for corners and join
Doubling the sum of the width and length gives the perimeter of the rectangular quilt, and adding the overlap allowance covers the corners and the closing seam.
Worked example
Your quilt is 60 inches wide by 80 inches long, and you want a 10 inch overlap allowance.
- Perimeter = 2 x (60 + 80) = 2 x 140 = 280 inches
- Binding length = 280 + 10 = 290 inches
- In feet = 290 / 12 = 24.17 feet
You need 290 inches, about 24.17 feet, of binding. These are the calculator's default inputs, so the result above matches the widget exactly.
Quilt binding length calculator: frequently asked questions
How much binding do I need for a quilt?
Measure the quilt's width and length, add them and double the result to get the perimeter, then add an overlap allowance for turning the corners and joining the ends. A 60 by 80 inch quilt has a perimeter of 280 inches, and adding a 10 inch allowance gives 290 inches, which is about 24.17 feet of binding strip.
Why add an overlap allowance?
Binding has to turn four corners and the two ends must overlap and be joined neatly, all of which use extra length beyond the bare perimeter. A common allowance is around 10 to 15 inches to cover mitred corners and the closing seam. Adding a margin avoids running short on the final side, which is a frustrating place to discover a shortfall.
How do I turn strip length into fabric?
Once you know the total strip length, divide it by the usable width of your fabric to find how many strips to cut, then multiply the number of strips by your binding cut width to find how much fabric depth you need. Most quilters cut binding strips between 2 and 2.5 inches wide for a double-fold finish, joined end to end into one continuous length.
Should I use straight-grain or bias binding?
Straight-grain binding is the most common and most fabric-efficient choice for quilts with straight edges, and it is what this calculator's simple perimeter method assumes. Bias binding, cut at 45 degrees, is more stretchy and is preferred for curved edges or scalloped borders, but it uses more fabric, so allow extra if you choose it.
What is the quilt binding length formula?
Binding length equals two times (width plus length) plus the overlap allowance. For a 60 by 80 inch quilt with a 10 inch allowance, that is 2 x (60 + 80) + 10 = 290 inches, which is about 24.17 feet.
Official sources
- Length measurement standards and units: US National Institute of Standards and Technology (NIST). As at 25 June 2026.
Reviewed by the CalculatorHub team, edited by James Graham, 25 June 2026. See our methodology. This is general information, not financial, tax, legal or investment advice.