How to Measure for Curtains: Width, Length and How High to Hang Them

Most curtain mistakes come down to a few inches: panels that don't meet in the middle, hems that float above the floor, or a rod hung so low the window looks small. This guide covers every measurement you need, in the order you should take it, so your curtains fit the first time.

You'll need a steel tape measure, a pencil and a step stool. If your rod is already up, measure from the rod. If it isn't, decide where it will go first, because the rod position sets both your width and your length.

Step 1: Decide where the rod goes

Rod placement changes how big the window looks and how much light the curtains block.

• Height: a common rule is 4–6″ above the top of the window frame. In rooms with tall ceilings, mounting the rod closer to the ceiling (halfway between the frame and the ceiling, or just below crown molding) makes the window and the whole room look taller.
• Width: extend the rod 4–6″ past the frame on each side, or up to 10–12″ if you want the open curtains to clear the glass completely and let in more light.

Mark the bracket positions lightly in pencil, then take your measurements from those marks.

Step 2: Measure the width

Measure the full length of the rod from end to end, not counting the finials. If the rod isn't up yet, measure the window frame and add the extra width you chose in step 1.

Curtains need extra fabric so they look full when closed. Multiply your rod width by a fullness factor, then split the total across your panels.

For blackout curtains, aim for the fuller end of the range so the panels overlap in the middle and wrap past the frame. Most light gets in around curtains, not through them.

Step 3: Measure the length

Measure from the top of the rod to where you want the hem to end. For pinch pleat curtains on rings, measure from the bottom of the ring instead, and for a track, from the top of the track.

Measure the length at both ends and in the middle of the window, because floors and ceilings are rarely perfectly level. Use the shortest number for floor-length curtains so the hem doesn't drag.

Step 4: Choose a heading style

The heading changes how the curtain hangs and how you measure the length.

• Pinch pleat: stitched triple pleats on a stiffened header that hang from rings or a traverse rod. Tailored and full, and they block light well. Measure length from the bottom of the ring.
• Back tab: hidden loops on the back that make soft, even folds. Measure from the top of the rod.
• Rod pocket: a sewn channel the rod slides through. Best for curtains you rarely open.
• Tab top: visible fabric loops for a relaxed look.

Measuring special windows

Sliding glass doors

Extend the rod well past the frame on the side where the curtains will stack, so the open panels don't block the door. Wide panels or a traverse rod with pinch pleat drapes keep the curtains easy to open and close.

Tall and floor-to-ceiling windows

Measure from the rod to the floor at several points. Long drops are where made-to-measure curtains make the biggest difference, because ready-made panels usually stop at 84″, 96″ or 108″.

Wide windows and corner windows

Measure each section separately and note where the rods meet. Very wide sheers look best without a seam, so check the maximum panel width before you order.

Check your numbers with our calculator

Once you have your rod width and drop, our curtain size calculator works out panel width and length for you. Then build your curtains in exact sizes: Fabrica Kraft makes panels from 10″ to 120″ wide and up to 144″ long.

• Custom indoor curtains and drapes
• Custom pinch pleat curtains
• Custom blackout curtains
• Custom sheer curtains, cut seamless up to 120″ wide
• Outdoor curtains for porches, pergolas and cabanas

Not sure about your numbers? Send your measurements and a photo of the window before you order and we'll check them. Custom curtains are made to your size, so they can't be returned, and we'd rather get it right before we cut.

FAQ

How do you measure for curtains?

Measure the rod width end to end and multiply by 1.5 to 2 for fullness. Then measure from the top of the rod (or the bottom of the ring for pinch pleats) to where you want the hem. Take the length at both ends and the middle and use the shortest.

How wide should curtains be?

Together, your panels should be 1.5 to 2 times the width of the rod. Use 2 times for sheers and pinch pleat drapes, and 1.5 times for a flatter, modern look.

How high should you hang curtains?

A common rule is 4–6″ above the window frame. In rooms with high ceilings, hang the rod closer to the ceiling to make the window and room look taller.

How long should curtains be?

For most living rooms and bedrooms, curtains should end just above or just touching the floor. Sill length suits windows over a counter or radiator, and a 1–2″ puddle gives a softer, formal look.

Should curtains touch the floor?

Usually, yes. Floor-length curtains look finished and make rooms feel taller. Leave about ½″ of clearance if you want them to slide easily or if you vacuum often.

What size curtains do I need for a sliding glass door?

Measure the door width, add 8–12″ on each side so the open curtains clear the glass, and multiply by 1.5 to 2 for fullness. Most patio doors need two wide panels or one very wide panel per side.

What are standard curtain lengths?

Ready-made curtains usually come in 63″, 84″, 96″ and 108″ lengths. If your window falls between them, made-to-measure curtains let you order the exact drop, up to 144″ with us.