Sewing drapes is a straightforward project if you measure twice, cut once, and use a basic running stitch

Sewing drapes means taking fabric, hemming the sides and bottom, adding a header (the pocket that holds the rod), and hanging them. You do not need a serger or an industrial machine—a standard home sewing machine handles drapes well. The hardest part is measuring your window and calculating how much fabric to buy; the actual sewing is repetitive and forgiving. Most people finish a pair of drapes in four to six hours spread across a weekend.

The process breaks into five steps: measure the window, buy and cut the fabric, hem the sides, create the header, and hang. Each step has a clear order, and mistakes in one step are usually fixable in the next. This guide walks you through each one so you know what to expect before you start.

Key Takeaways

  • Measure your window height from the rod to where you want the drapes to end (usually the sill or floor), then add 8 inches for the header and bottom hem.
  • Measure the width of your rod or window, multiply by 1.5 to 2 for fullness, then divide by the width of your fabric bolt to find how many widths you need to sew together.
  • Hem the sides first with a half-inch fold, then the bottom with a two-inch fold, using a straight stitch on your machine.
  • The header is a casing sewn at the top; a standard size is 2.5 inches deep, which fits most standard rods.
  • Hang the drapes while they are still on the machine table or ironing board so you can adjust the length before you trim the excess.

Measure Your Window and Calculate Fabric Length

Start by measuring the height from where your rod will sit to where you want the drapes to end. Most people hang drapes to the windowsill, the floor, or somewhere in between. Measure in at least two places on the window because walls are rarely perfectly level. Use the longest measurement.

Add 8 inches to that number: 4 inches for the header (the pocket at the top) and 4 inches for the bottom hem. That total is your cut length. For example, if your window is 60 inches from rod to sill, you will cut fabric that is 68 inches long.

Write this number down. You will use it to buy fabric and to cut your pieces.

Measure Your Window Width and Calculate How Much Fabric to Buy

Measure the width of your curtain rod from end to end, or measure the width of your window. Drapes look fuller and hang better when they are wider than the window itself, so multiply that number by 1.5 or 2. A 36-inch window with a 1.5 multiplier needs 54 inches of fabric width; with a 2 multiplier, it needs 72 inches.

Fabric comes in standard widths: usually 45 inches or 54 inches wide. Divide your needed width by the width of your fabric to find how many fabric widths you need. If you need 72 inches and your fabric is 54 inches wide, you need two widths sewn together (54 + 54 = 108 inches, which is wider than 72 and gives you fullness).

Multiply the number of widths by your cut length. If you need two widths and each is 68 inches long, you need 136 inches of fabric total, which is about 3.8 yards. Buy 4 yards to have a little extra for mistakes. Write down the number of widths you need—you will cut and sew them together before you hem.

Cut and Prepare Your Fabric

Lay your fabric on a large, flat surface—a cutting table, a clean floor, or a large bed. Straighten one end by cutting perpendicular to the selvage (the finished edge). Measure from that cut line and mark your cut length with pins or chalk every few inches across the width. Cut straight across.

If you need more than one width, cut all your pieces to the same length. Lay them side by side to check that they match. Press each piece with an iron on a medium setting to remove wrinkles and folds.

If you need to sew widths together, place two pieces right sides together (the pretty sides facing each other), align the edges, and sew a half-inch seam down the length using a straight stitch. Press the seam open with an iron. Repeat until all widths are sewn together into one large panel.

Hem the Sides and Bottom

Lay your sewn panel flat with the wrong side (the back) facing up. Fold one long edge toward the back by half an inch, press it with an iron, then fold it again by another half inch and press. This creates a finished edge that will not fray. Pin the fold in place and sew it down with a straight stitch, staying close to the inner fold. Repeat on the other long edge.

Fold the bottom edge up by two inches toward the back, press, then fold it up again by two inches and press. Pin and sew this hem the same way. The bottom hem is thicker than the side hems because weight helps drapes hang straight.

Press all hems with an iron when you are done. They should be flat and crisp.

Create the Header (the Rod Pocket)

Fold the top edge down toward the back by half an inch, press it, then fold it down again by 2.5 inches (or whatever depth you want your header to be) and press. This creates a casing that your rod will slide through. Pin the fold in place.

Sew along the bottom edge of this fold with a straight stitch, staying close to the fold. This creates the pocket. Then sew again about half an inch above that line, parallel to it. This second line of stitching reinforces the header and keeps it from sagging under the weight of the rod.

Press the header flat. Slide your curtain rod through the pocket to check that it fits snugly but not so tight that you cannot move it. If it is too tight, you can carefully cut a small slit in the back and add a snap or hook to close it, but this is rarely necessary.

Hang and Adjust the Length

Hang your drapes on the rod while they are still on your work surface or ironing board if possible. If not, hang them and step back to look at the length. The bottom should just touch the sill, the floor, or wherever you measured to. If the drapes are too long, fold the bottom hem up a bit more and re-sew. If they are too short, you may have measured wrong—check your math and consider adding a decorative trim or band at the bottom.

Once the length is right, let the drapes hang for a day or two. Fabric relaxes and stretches slightly, so the length may change a little. Check again and adjust if needed.

Frequently Asked Questions

What stitch should I use on my sewing machine?

Use a straight stitch at a medium length (about 2.5 on most machines). Drapes do not need a fancy stitch—a straightforward straight line holds fabric together and looks clean. Backstitch at the beginning and end of each seam to lock the thread.

Can I use a serger instead of a regular sewing machine?

A serger works, but it is not necessary. A serger finishes raw edges and looks professional, but a regular machine with a straight stitch and a pressed hem is just as functional and more common for home drapes.

What thread should I use?

Use all-purpose polyester or cotton thread that matches your fabric color, or use a neutral color like beige or gray if you cannot find an exact match. Avoid very thin thread—it breaks easily on heavy fabric. One spool is usually enough for a pair of drapes.

Do I need to pre-wash the fabric?

Check the fabric care label. Most home décor fabrics do not need pre-washing, but if the label says to wash, do it before you cut. Wash in cool water and dry on low heat to avoid shrinkage.

What if my fabric has a pattern that needs to match at the seams?

Lay your fabric widths side by side before you sew them together and shift them until the pattern lines up. This takes extra time but makes the seams invisible. Pin carefully and sew slowly so the pattern stays aligned.