Enter the width, height, and number of panels into the calculator to determine the yardage needed for drapery; this calculator can also evaluate any of the variables given the others are known.

Drapery Yardage Formula

The following formula is used to calculate the yardage needed for drapery:

Y = (W * H * N) / 36


  • Y is the yardage needed for drapery
  • W is the width of the window or area to be covered in inches
  • H is the height of the window or area to be covered in inches
  • N is the number of panels or pieces of drapery

To calculate the yardage needed for drapery, multiply the width of the window or area by the height, then multiply the result by the number of panels. Divide the final result by 36 to convert it from inches to yards.

What is a Drapery Yardage?

Drapery yardage refers to the amount of fabric measured in yards required to create a piece of drapery or curtain. This measurement is crucial in determining the cost and feasibility of a drapery project. The yardage needed depends on several factors, including the style of the drapery, the size of the window, the desired fullness or thickness of the drapery, and whether or not there will be any additional features like valance or tiebacks. For instance, a simple, flat panel curtain may require less fabric than a pleated or ruffled style. Similarly, a larger window or a desire for a fuller, more luxurious look will also require more fabric. Therefore, calculating drapery yardage accurately is essential to ensure that enough fabric is purchased for the project.

How to Calculate Drapery Yardage?

The following steps outline how to calculate the Drapery Yardage:

  1. First, determine the width of the fabric (in inches).
  2. Next, determine the length of the drapery (in inches).
  3. Next, calculate the fullness factor. This is typically a percentage (e.g., 100% for no fullness, 200% for double fullness).
  4. Calculate the fabric width needed by multiplying the drapery length by the fullness factor.
  5. Finally, divide the fabric width needed by the width of the fabric to determine the yardage required.

Example Problem:

Use the following variables as an example problem to test your knowledge:

Width of the fabric (in inches) = 54

Length of the drapery (in inches) = 84

Fullness factor = 150%