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Curtains should generally have a combined width of 1.5 to 2 times the width of the curtain rod so they have enough fabric to form folds when closed. The exact width depends on the amount of fullness you want and the curtain style.
How to Measure for Curtain Width
Measure curtain width from the usable width of the rod or track, excluding decorative finials. If you have not installed the hardware yet, start with the window width and determine how far you want the rod to extend beyond the frame.
- Measure the window. Measure across the outside edges of the window trim.
- Add the rod extension. Curtain rods commonly extend 4 to 6 inches beyond each side of the window.
- Determine the usable rod width. Do not include decorative finials.
- Choose the fullness. Multiply the rod width by 1.5 for lighter fullness or 2 for a fuller appearance.
- Divide between the panels. For two equal panels, divide the total curtain width by two.
Choose the size and design of your curtain or drapery rod before ordering curtains whenever possible. Once the hardware dimensions are established, you have a more accurate measurement for calculating curtain width.
Curtain Width Examples for Common Window Sizes
The examples below assume the curtain rod extends 4 inches beyond each side of the window and the curtains have 2-times fullness. A wider rod or greater fullness will increase the amount of fabric needed.
How wide should curtains be for a 36-inch window?
For a 36-inch window, you would need approximately 88 inches of total curtain width using a 44-inch rod and 2-times fullness.
- Rod width: 36 + 8 = 44 inches
- Total curtain width: 44 × 2 = 88 inches
- Width for two equal panels: 44 inches each
How wide should curtains be for a 48-inch window?
For a 48-inch window, you would need approximately 112 inches of total curtain width using a 56-inch rod and 2-times fullness.
- Rod width: 48 + 8 = 56 inches
- Total curtain width: 56 × 2 = 112 inches
- Width for two equal panels: 56 inches each
How wide should curtains be for a 60-inch window?
For a 60-inch window, you would need approximately 136 inches of total curtain width using a 68-inch rod and 2-times fullness.
- Rod width: 60 + 8 = 68 inches
- Total curtain width: 68 × 2 = 136 inches
- Width for two equal panels: 68 inches each
How wide should curtains be for a 72-inch window?
For a 72-inch window, you would need approximately 160 inches of total curtain width using an 80-inch rod and 2-times fullness.
- Rod width: 72 + 8 = 80 inches
- Total curtain width: 80 × 2 = 160 inches
- Width for two equal panels: 80 inches each
Ready-made panels may not come in the exact width you calculate. When choosing between available sizes, the next wider option will generally provide better coverage and fullness than panels that are too narrow.
Curtain Fullness Depends on the Heading
The curtain heading affects both how the fabric hangs and how its width is calculated. Flat ready-made panels with grommets, rod pockets, rings, or tabs are generally labeled according to their full fabric width, so you need to account for fullness when determining how many panels you need.
Pleated custom drapery works differently. Pinch pleats, Euro pleats, and similar headings are sewn to a finished width, with the additional fabric needed for the pleats incorporated during fabrication. You do not multiply that finished width again when determining coverage.
Ripple fold drapery also has its own fullness requirements based on the track and carrier spacing. The measurements should be determined according to the selected hardware system.
Fabric Weight Can Affect the Amount of Fullness
Curtain and drapery fabrics gather differently depending on their weight and construction. Lightweight and sheer fabrics can often accommodate greater fullness, while heavier fabrics create substantial folds with less gathering and require more room to stack when open.
Patterned fabrics may also require additional material so the design can be aligned across multiple panels. This extra fabric is separate from the amount needed to create fullness.
Functional Curtains Require Full Coverage
Curtains used for privacy or light control need enough width to cover the entire rod or track when closed. Depending on the design, additional fabric may also be needed for the center overlap and the returns at the outside edges.
Returns extend from the front of the rod toward the wall and help cover the gap at the sides of the window. A center overlap helps the two panels meet without leaving a visible gap.
Stationary side panels are different because they are designed to frame the window rather than close across it. Their width is based primarily on the proportions of the window and the desired finished appearance.
Custom Measurements Create a More Precise Fit
Ready-made curtains can work well when standard panel sizes provide the width and fullness you need. Large windows, structured pleats, patterned fabrics, and functional treatments can make the measurements more complicated.
With custom drapery, the finished width, fullness, heading, and stack position can all be planned around the window and selected hardware. This allows the proportions of the treatment to be determined as part of the overall design rather than by the closest available panel size.
Plan Your Custom Curtains With House of Shades
At House of Shades, we help determine the right curtain width, fullness, fabric, and hardware for your windows. Our team provides professional measuring and installation for custom curtains, drapery, and layered window treatments.
Book an appointment online or call (480) 336-3427 to get a free quote. We are happy to provide window treatment services to Scottsdale and the surrounding communities.
FAQs
Does the width on a curtain package refer to one panel?
It depends on the product. Some packages list the width of one panel, while others provide the combined width of a pair. Check the number of panels included before calculating the total curtain width.
Can curtains be too wide for a window?
Yes. Too much fabric can create bulky folds, take up additional space when the curtains are open, and add unnecessary weight to the hardware. The appropriate width depends on the fabric, heading, rod, and amount of fullness you want.
How wide should curtains be for a sliding glass door?
Measure the full usable width of the rod or track, including the area where the curtains will stack beside the door. Functional curtains must cover the entire opening when closed without preventing the door from operating.
