How to measure curtain rods: width and height guidelines

Accurate curtain rod measurements help drapes hang neatly, open fully and frame a window without blocking valuable light. The basic dimensions are straightforward: measure the window, allow space for the curtain stack, and decide how high the rod should sit above the architrave or recess.

Australian homes often need a little extra planning. A Sydney apartment may have limited wall space, while a Queensland room can benefit from airflow and sun protection. In Melbourne, well-fitted curtains can help reduce winter draughts, and homes in Perth or Adelaide may need generous coverage against strong afternoon sun.

Start with the outside width

For most curtains, an outside-mounted rod should extend beyond both sides of the window. Measure the window frame or architrave width, then add approximately 150–300 mm on each side. This gives the fabric somewhere to stack when open and reduces the amount of glass covered by the curtain.

A wider extension is useful for thick, thermal or blackout drapes because they need more room when gathered. If the window is 1,800 mm wide, a practical rod length may be between 2,100 and 2,400 mm, depending on the available wall space and the fullness of the curtains.

Decide how high the rod should sit

Mounting the rod 100–150 mm above the window frame is a reliable starting point. For a taller appearance, position it closer to the ceiling or just below the cornice, provided there is enough room for the brackets and heading style. This draws the eye upwards and can make standard Australian ceiling heights feel more generous.

Measure from the proposed rod position down to the floor, sill or another finishing point. Floor-length curtains usually sit just above the floor, while puddled hems require extra length and are less practical in high-traffic rooms. In homes with polished timber or tiled floors, a small clearance helps prevent dirt and moisture from collecting in the hem.

Allow for stack-back and hardware

Rod width is about more than the glass area. The curtain stack-back is the section of fabric gathered at each side when the panels are open. Allowing around 150–250 mm per side is common, although heavily lined drapes may require more. This matters in rooms where you want maximum daylight, such as a north-facing living area.

Include finials, returns and brackets in your planning. A return rod that curves towards the wall can reduce light gaps, which is helpful for bedrooms. Decorative finials may add several centimetres to the overall width, so check the product dimensions before marking the wall.

Measure bays and unusual windows

Bay windows need separate measurements for each section, especially when the walls change angle. A flexible or multi-sided bay track may be more suitable than a single straight pole. Measure each window face, note the angles, and record the distance between the window and nearby corners.

For corner windows, sliding doors and wide openings, identify where the curtains will meet and where they will stack. In compact Sydney or Melbourne apartments, furniture can limit the available clearance beside a window. Mark the intended bracket positions with removable tape before drilling to confirm that doors, handles and cabinetry will remain accessible.

Match the rod to the curtain fabric

Lightweight sheers can use a slimmer rod, while velvet, lined cotton and thermal drapes require stronger brackets and a suitable support in the centre. Long rods should not rely only on end brackets, particularly when children or pets may pull on the fabric.

Insulated curtains can improve comfort in both hot and cool rooms. For guidance on how they may support household energy efficiency, see these thermal drape benefits. In Brisbane or Darwin, also consider humidity, ventilation and fabric care when selecting a lined window treatment.

Check light, privacy and mounting surfaces

Before finalising the height, observe the room at different times of day. A bedroom facing a bright street may need the rod positioned wide and high enough to minimise side gaps. A west-facing room in Perth or Adelaide may benefit from overlapping panels and a wraparound return to block late-afternoon glare.

Use a stud, masonry anchor or appropriate plasterboard fixing rather than relying on a standard screw alone. Australian brick homes, plasterboard walls and concrete apartment structures require different hardware. Confirm that the bracket depth clears the window handle, security screen or roller blind.

Measuring recommendations to keep nearby

Use these practical checks before ordering a custom rod or curtain set:

• Record every measurement in millimetres, including window width, wall width and finished drop.
• Measure in at least two places because frames, floors and ceilings may not be perfectly level.
• Add space for curtain stack-back before choosing the final rod length.
• Check bracket strength, centre supports and wall fixings against the curtain weight.
• Order fabric samples and confirm the heading style before locking in the finished drop.

A consistent measuring record makes custom ordering much easier. Factory Direct Drapes provides custom drapery options with fabric choices, measuring guidance and made-to-order styles suited to both residential and commercial spaces.

For a calm bedroom atmosphere, curtain placement can work alongside soft, low-glare lighting; these ideas for gentle filament lighting offer useful inspiration. Once the width, height, clearance and fixing points are confirmed, submit your measurements for a tailored window treatment made to fit your Australian home.