Measure Bedroom Curtains Before Ordering: A Simple Worksheet

Curtain measurements become confusing when the window opening, curtain rod and fabric width are treated as the same thing. They describe different parts of the installation. Separate them on a worksheet before comparing products, and keep all measurements in one unit.

This is a measuring process rather than a specification for a particular curtain product. Heading styles and manufacturers use different conventions, so check the instructions for the curtains and hardware you choose.

Decide what the curtains need to do

Write down whether your priority is privacy, light control or simply softening the room. Think about when you use the bedroom and whether curtains must open fully. A decorative panel that never closes has different width needs from a pair intended to cover the entire window.

Look for obstructions: a bedside table, a radiator, an opening window handle or a wardrobe door. Follow appliance clearance instructions around heaters. Do not plan fabric to drape across a heat source because it looks better in a photograph.

Make a worksheet with these measurements

Measurement	What it describes
Window opening width	The visible opening you want to cover
Usable rod or track width	The distance over which the curtains can travel
Hanging point to intended hem	The finished length required for your heading style
Space at each side	Room for fabric to gather when open
Furniture and handle projections	Obstacles the moving fabric must clear

For an existing rod, measure the usable span rather than including decorative finials. For new hardware, establish a suitable fixing position before calculating curtain length. Do not assume every wall or ceiling accepts the same fixings.

Work out panel width from the listing

Read whether the stated width applies to one panel or a pair. Two panels each measuring 140 cm provide 280 cm of flat fabric; a pair advertised as 140 cm total does not. This example explains the arithmetic, not the amount of fabric your window requires.

The fullness you need depends on the heading, fabric and desired appearance. Use the supplier’s guidance for the particular curtain. Gathering takes up some flat fabric width, so a panel equal to the window width may not cover it as expected when hung.

Measure length from the correct point

Eyelet, tab-top and hooked curtains hang differently. Establish where the product’s stated length begins before measuring downward. Measure at the left, middle and right of the intended span; floors and rods may not be perfectly level.

Choose whether the hem should clear the floor or finish at another intentional point. Fabric that pools on the floor needs different care and can get caught under furniture. If hemming is necessary, confirm that the fabric and lining can be altered before ordering.

Check the opening as well as the closed view

Picture where each panel gathers during the day. It may cover some glass, interfere with a handle or overlap a bedside table. A wider rod is useful only if there is suitable wall space and a safe fixing location for it.

Keep operating cords out of children’s reach and follow the window-covering manufacturer’s safety instructions. Choose appropriate hardware rather than improvising a hanging method for heavy fabric.

A worked width calculation

Suppose your usable track is 180 cm wide and the supplier recommends flat fabric equal to twice the track width for your chosen heading. The calculation is 180 × 2 = 360 cm of total flat fabric. For two equal panels, each would need 180 cm of flat width under that specific recommendation. This is an illustrative calculation, not a universal fullness rule.

If a listing offers two 140 cm panels, the total is 280 cm: 80 cm less than the example calls for. A longer rod does not solve that shortage. Choose another panel width, another quantity supported by the heading system, or a different product. For ready-made pleated curtains, the listed width may already describe the gathered coverage; do not multiply it again without checking.

Troubleshoot before ordering

What you notice	What to check next
Curtains close but look stretched flat	Compare total fabric width with the supplier’s fullness guidance
The hem differs from one side to the other	Recheck the rod level and all three floor measurements
Fabric covers too much glass when open	Check stack-back space and whether the hardware can extend safely
Light enters at the top or sides	Review hardware projection, overlap and lining; extra length alone will not fix every gap

For a bay window or several connected tracks, label each segment separately. Curves, brackets and joins affect where runners can travel. Ask the hardware supplier how to measure the system before using the straight-track example above.

Final ordering checklist

Confirm panel quantity, heading type, finished length, flat width, care instructions and return conditions. Keep your worksheet with the order confirmation so that you can check what arrived. For the rest of the room, explore our bedroom guides.