How to Measure for Curtains
Share
A steel tape and five minutes of care will save you from panels that pool in a heap or hover three inches above the sill. Most curtain trouble traces back to one skipped step: people measure the glass instead of the space the fabric actually has to cover. Learning how to measure for curtains starts before you touch the window at all. It starts with the rod.
Use a metal tape, not a cloth one. Cloth stretches and lies to you.
How to measure for curtains: start with the rod
Curtains look best when the rod sits well above and beyond the frame. A reliable rule: mount the rod 4 to 6 inches above the top of the window frame, higher if you want the ceiling to feel taller. In rooms with 9-foot ceilings we've often gone all the way up, hanging the rod just below the crown molding so the panels read as one clean sweep of fabric. Extend the rod 8 to 12 inches past the frame on each side, too. That overhang lets the curtains stack off the glass when they're open, so you keep the whole window and all its light.
Measure only after the rod is up. Every number below depends on where it sits.
Width: the number most people get wrong
Here's where flat, tired-looking curtains come from: buying panels that match the window width exactly. You want fullness. Measure the full length of your rod, bracket to bracket, then multiply.
For a gathered, tailored drape, aim for total panel width of 2 to 2.5 times the rod length. Sheer linens can push to 3x if you want them really lush. So a 60-inch rod wants roughly 120 to 150 inches of combined panel width. If one panel is 50 inches wide, that's three panels, not two. Round up. Too full always beats too skimpy.
Length: where the hem lands
Measure from the top of the rod (or from the ring or hook point, depending on your header) straight down to your stopping point. You have three finishes to pick from.
Sill length stops about half an inch above the windowsill, which is practical for kitchens and baths. Apron length falls 4 to 6 inches below the sill. Floor length is where most living rooms want to be, and it's the one that reads expensive.
For floor length, measure to the floor first, then decide on the break. A hem that clears the floor by half an inch stays crisp and easy to vacuum around. A "kiss," where the fabric just grazes the boards, is the classic tailored choice. Want the romantic, slightly rumpled puddle? Add 2 to 6 inches. At ARCADA we lean toward the kiss for everyday rooms; it's forgiving and it photographs well. Our guide to linen curtains digs into how different fabrics hang and settle over the first few weeks.
One more thing people forget: measure each window on its own. Houses settle, frames shift, and two windows on the same wall can differ by an inch. Write every number down. Then browse Curtains & Window with real dimensions in hand, and pull the room together with the rest of your Living Room pieces. If bare walls flank the window, a gallery wall helps balance the height a high rod creates.
Frequently asked questions
How do I measure for curtains if the rod isn't up yet?
Decide where it will go first, 4 to 6 inches above the frame and 8 to 12 inches past it on each side, then measure from that planned position. The rod location sets both your width and your length, so guessing it after the fact throws every number off.
How much wider than the window should curtains be?
Measure the rod, not the window, and buy 2 to 2.5 times its length in total panel width. For sheer linen, 3x gives a fuller drape. That extra width is what creates soft folds instead of one flat, stretched panel.
Should curtains touch the floor?
In living rooms and bedrooms, yes. Floor length looks the most finished. A half-inch float above the floor is easiest to clean, a gentle kiss to the boards is the tailored standard, and a 2- to 6-inch puddle gives a softer, more traditional feel.