Plan your quilt binding before you cut

Start with the quilt you will actually bind

Measure the quilt after the borders are attached. Record its width and length in inches, then add them together and double the result. That gives the perimeter: the distance your binding needs to travel around the quilt.

Binding also needs a little room for corners and the final join. Quilt & Piece keeps this extra length separate from the length lost when you join individual strips, so you can see where each allowance goes. The default extra is 12 inches; change it to suit your pattern and finishing method.

Use the width you can cut, not just the bolt label

The fabric-width field means usable strip length after removing selvages and squaring the fabric. Measure the fabric you have, especially if you have washed it. A width printed on a shop listing is not a promise that every inch can go into your strips.

This calculator plans straight-grain, width-of-fabric strips. It does not calculate a continuous bias-binding square. For a curved edge or a pattern that specifies bias binding, use that pattern's cutting method.

Account for every strip join

If you cut n strips, you usually make n minus 1 joins to connect them. The planning model is: available binding = n × usable strip length − (n − 1) × join loss. It finds the smallest whole number of strips that reaches your perimeter plus extra length.

For the usual square-overlap diagonal join, a useful planning estimate for the loss is one strip width. The default is 2.5 inches for a 2.5-inch-wide strip. If your joining technique consumes a different amount, update the join-loss field instead of assuming each strip contributes its full cut length.

An example: a 60 × 72-inch quilt

The perimeter is 264 inches. Adding 12 inches gives a binding target of 276 inches. With 42-inch usable strips and a 2.5-inch loss at each join, seven strips provide 279 inches after six joins; six strips would provide only 239.5 inches.

Seven strips cut 2.5 inches wide use 17.5 inches along the bolt, or about 0.486 yard. Rounded upward to the next 1/8 yard, the shopping amount is 1/2 yard. That rounding is a shopping aid; extra for shrinkage, print matching, or your preferred reserve is still your choice.

Keep these notes with your project

Save the strip width, usable fabric width, and joining method with your project. When it is time to cut, your printed list will be more useful than a yardage number on its own.

• Confirm the final quilt measurements and the binding method in your pattern.
• Measure usable fabric width after your chosen fabric preparation.
• Check the strip count and allowances before cutting the full batch.