- 1). Measure the width of the window inside the window frame with a tape measure. Take a measurement near the top, in the middle, and near the bottom. Write these measurements down. Use the smallest of these measurements as the actual width of the window.
- 2). Record a number that is 1/2 inch less than the number calculated as the finished width of the window covering mounted inside the frame of the window.
- 3). Measure the window width from the outside edges of the window frame in three different places to plan for an outside mounted flat-panel blind. For outside mount, use the largest of these three numbers as your actual window width.
- 4). Add a minimum of 2 inches to the actual window width noted to get the finished width for an outside mounted flat panel.
- 1). Measure the length of the drapery rod that you intend to use.
- 2). Multiply the length of the rod by one-and-a-half to twice the width for heavier fabrics and lined panels to obtain the finished width. For example, for a 36-inch-rod, you would need a 54 inch to 72 inch finished width of fabric. Since most drapery fabrics come in 54-inch widths, you could use one width of fabric divided in half to make the two drapery panels for a 36-inch rod.
- 3). Multiply the rod length by three for lighter draperies, such as sheers, to obtain the finished width. This will ensure proper fullness.
Calculating the Finished Width of a Flat Panel Window Covering
Calculating the Finished Width of Drapery Panels
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