Almost every curtain that looks wrong in a photograph looks wrong for the same reason: the rod is too low. Not the fabric, not the color, not the fullness. The rod. Hang it a couple of inches above the window trim, which is where instinct puts it, and the window stays exactly as short as it was. Hang it near the ceiling and the same window, the same fabric, reads a foot taller. This post is about that one number and the handful of rooms where the usual answer doesn't apply. If you just want your own number, our curtain length calculator takes your ceiling height and window position and returns the exact rod height, drawn to scale.
The rule, and the reason it works
The standard advice is 4 to 6 inches above the window frame. Treat that as the floor of the range, not the target. The better target is two thirds of the way from the top of the frame to the ceiling, and in a standard 8 or 9 foot room that usually lands you within about 6 inches of the ceiling. The only hard stop is bracket clearance: leave roughly 2 inches below the ceiling, or below the bottom edge of crown molding if you have it. Measure to the bottom of the crown, not to the ceiling behind it, because the bracket has to sit on flat wall.
Why it works is just optics. Fabric hung high draws one unbroken vertical line from near the ceiling to the floor, and the eye reads that entire line as the window. Hang the rod at the frame and the eye reads the frame instead, which in most houses means a 5 foot window marooned in an 8 foot wall with a wide band of blank drywall above it. The cost of the upgrade is a few extra inches of fabric per panel. There is no other change you can make to a room for that money that does as much work.
One caution, because it's the mistake that follows the rule. A high rod only pays off if the panel reaches the floor. Curtains hung near the ceiling that stop at the sill look like curtains hung too high, which is a worse outcome than not raising them at all. Height and length are one decision made twice.
When the wall runs out
Plenty of windows sit so close to the ceiling that there's no wall left to work with. Newer construction does this constantly, and so do remodels that pushed the header up. When you have less than about 4 inches of wall above the frame, stop trying to fit a rod into it and switch to a ceiling mount. Either a ceiling bracket that drops a standard rod down a few inches, or a track fixed to the ceiling itself, which is the version we specify most often. A ceiling track puts the heading at the highest point in the room and glides more smoothly than any rod across a long span, which is why ripple fold panels are almost always built for track rather than rod.
Ceiling mounting introduces its own problem, which is that ceiling drywall holds nothing. Find the joists. If they run parallel to the window instead of across it, and they often do, screw a mounting board to the joists first and fix the track to the board. That board disappears behind the heading and turns an impossible install into a routine one.
Bay windows, corners, and arches
Bay windows want one continuous rod or track that follows the angles, not three independent rods. Three rods means three stacks of fabric and a cluttered bay, and it makes the middle window look like an afterthought. Bendable rods handle gentle bays; a curved ceiling track handles anything. The thing people forget is stack space: panels have to go somewhere when they're open, and a shallow bay has no room for them, so plan on the outer panels stacking onto the flat wall past the bay.
Corner windows, the two-walls-meeting kind common in mid-century houses, work best with two tracks that meet at the corner, with the panels stacking outward toward the far ends. Running fabric into the corner itself buries the light and defeats the point of the window.
Arched windows are the one place where covering the top is a defensible choice. You can mount a straight rod above the arch and let the panels frame it, which is what we recommend when the arch is the nicest thing in the room, or you can follow the curve with a custom bent rod, which costs real money and permanently hides the shape you paid for. Transoms are the opposite case: if there's a fixed pane above the operable window, hang above the transom and treat the whole assembly as one tall window.
The rooms where the rule reverses
Low ceilings flip the advice. In a 7 foot 6 converted basement or an attic bedroom, a rod at the ceiling puts the heading right in the sightline of anyone standing up, and the room feels shorter, not taller. Mount a hand's width above the frame and let the length of the panel do the work instead.
Sloped and vaulted ceilings need a decision rather than a rule. Hang the rod level, always, even though the ceiling isn't, and pick a height that works at the lowest point of the slope above the window. A rod that follows a rake looks like a mistake even when it was deliberate. In genuine double-height rooms, going all the way to the top can strand the window in an ocean of fabric, so we'll often hang 12 to 18 inches above a 10 foot frame and let the proportions breathe. Rooms like that are worth a second opinion before anyone drills, and in LA and Ventura counties our in-home measurement is free for exactly this reason.
Brackets and anchors, which is where installs actually fail
A rod at ceiling height carrying two lined panels is heavier than it looks, and the weight pulls down and out on the bracket at once. In drywall, that means a proper toggle or snap toggle in every hole that doesn't land on a stud, not the small plastic sleeve that came in the rod's box. Those sleeves are the single most common reason a curtain rod ends up on the floor with a chunk of wall attached.
Older Los Angeles housing brings its own problem. Pre-war walls are plaster over wood lath, which is hard, brittle, and completely unpredictable about what sits behind any given spot. Drill slowly with a masonry bit to get through the plaster skin without cracking it, and if you hit lath rather than a stud, use a toggle that opens into the cavity. We recently hung 11 foot panels in a 1920s Spanish Revival where every bracket landed on lath and not one on a stud; the fix was toggles into the cavity and a mounting board spanning the run, and the rod hasn't moved since. Add a center support past about 60 inches and another past about 96, or the rod will bow under the fabric within weeks.
Get the height right and the rest of the order follows from it. Panel width, fullness, and yardage come out of our window measurement tool, the full set of rules lives in our curtain measuring guide, and if you're still deciding between lighter curtains and heavier lined drapery, our post on curtains versus drapes covers the tradeoff. Heavier panels and full-height treatments raise the stakes on every anchor decision above, which is also why professional installation comes free with every order we make locally.
Frequently asked questions
How do you hang curtains in a bay window?
Treat the bay as one continuous run rather than three separate windows, because three separate rods produce three separate stacks of fabric and a very busy corner. The usual answer is a bendable rod or a curved ceiling track that follows the bay's angles, with panels at each end and optionally one at each interior corner. Mount it at the same height you'd use for a flat wall, measured from the bay's tallest frame, and remember the panels need somewhere to stack when they're open, which in a shallow bay often means letting them stack against the flat wall on either side. Bay windows are also where the return, the bit of fabric that wraps back to the wall, stops being optional if you care about the light gap.
How do you hang curtains from the ceiling?
You mount either a ceiling-mount bracket that drops a conventional rod a few inches below the ceiling, or a track screwed directly to the ceiling itself. The track is what hotels use and what we specify most often, because it hangs the fabric at the absolute top of the wall and glides better than any rod at long spans. Find the joists first: a track carrying 12 feet of lined drapery is heavy, and ceiling drywall alone will not hold it. If the joists run the wrong way, which happens constantly, a length of wood blocking or a mounting board screwed across them gives you something solid to hit anywhere along the run.
Where should curtain rod brackets be placed?
Put the outer brackets past the window frame, not above it, so the open panels stack on wall instead of glass. Ten to twelve inches beyond the frame on each side is a good default, and the rod needs another few inches beyond the bracket for the finial. Add a center support bracket on any run past about 60 inches, and a second one past about 96 inches, or the rod will sag visibly under lined fabric within a month. Check what's on the wall before you commit, since light switches, alarm panels, and abutting walls all get a vote before you do.
How do you hang curtains without drilling?
Tension rods inside the window opening are the only genuinely no-drill option that holds real weight, and they cap out around a light or medium fabric on a narrow window. Adhesive hooks rated for several pounds each work for sheers and lightweight panels if you clean the wall with alcohol first and let them cure a full day before loading them, but they will not carry lined drapery and they fail in hot rooms. The honest answer for renters who want full-length panels is that a few small holes, patched with spackle at move-out, cost less than the alternatives and look immeasurably better. Landlords almost never notice a filled quarter-inch hole.
How do you hang curtains with rings?
Clip rings pinch the top of the panel directly, and pleated panels use drapery pins that hook into the eye of each ring. The detail worth knowing is that rings lower the fabric: the panel hangs from the ring's eye, roughly an inch below the rod itself, so a panel measured from the rod will run about an inch long. Order the length from where the fabric actually starts, and tell your workroom you're using rings so they build to that number. Space the rings evenly, put one outside each bracket so the panel's outer edge stays put, and count on roughly one ring every 4 to 6 inches for an even hang.