How to work out how much fabric you need for binding

How to work out how much fabric you need for binding Patchwork & Quilting Tips
How to work out how much fabric you need for binding

We get asked this question a lot: "How much fabric will I need for binding?" So here's how to work it out yourself!

How to calculate for a standard, straight-grain, 2½ wide, double-fold binding :

  • Measure the width (A) and length (B) of your quilt; add these together, then multiply by two to find the total perimeter, 
    Eg, 50" + 72" = 122" x 2 = 244" total perimeter (If your quilt is an odd shape, you'll need to add together all four sides instead to get this number).
  • Add 20" for joining seams and corners.
    Eg, 244" + 20" = 264" 
  • Divide the total perimeter by the usable width of the binding fabric – for most fabrics that's 40", but for extra-wides it could be up to 104" – and round up to a whole number; this is the number of strips you'll need to cut.
    Eg, 264" ÷ 40" = 6.6 ≈ 7 strips 
  • Now multiply the number of strips by 2½ to get the quantity of fabric you need off the bolt.
    Eg, 7 strips x 2½" = 17½" 
  • You can also round up an inch or two for straightening up the fabric for your strips, if you want to be extra careful.
    Eg, 17½" ≈ 20"

Ta dah! That's how much fabric you need for binding!

Quilt shown is our  "Good Times Charm Pack Quilt" kit using the "Good Times" collection from American Jane Fabrics.