Nenxo
Curtain size calculator

What size curtains should I buy?

Enter a few measurements from your window. Nenxo tells you how long the rod should be, how many curtain panels to buy and what curtain length to look for.

Calculate my curtain sizeNot sure how to measure?
No signupInches + centimetresCompare store curtains
Step 1

Measure your window

You only need a tape measure. Start with the basics; mounting details are optional.

Quick examples
1

Your window

Measure the width, the free wall beside it and the height to the floor.

Measure the opening or the outside trim—just use the same reference throughout.
Use this when several windows share the same measurements and curtain choice.
If the rod is not installed yet, measure from where you plan to place it.
Measure to the nearest corner, cabinet or other obstacle.
2

How you want the curtains to look

The defaults are a sensible everyday starting point. Change them only if you want a different look.

More space lets open curtains sit beside the glass instead of covering it.
Not sure? Leave this on “Classic full look”.
3

If you already found a curtain

Enter the width of one panel from the product listing. If you have not chosen one yet, keep the example value and use the result as a guide.

Use the flat width shown by the store, before the curtain is gathered.
Optional: mounting positions
Only needed if you want Nenxo to show bracket marks. Check your rod instructions for this number.

Everything is calculated in your browser. Edits stay in this tab; Nenxo only creates a share URL when you choose “Copy share link”.

Your curtain size

60 in window · two-sided curtains

Fits your wall space
Simple answerUse a 76 in rod, 4 panels and aim for 96 in curtain length.Already found curtains? Compare them below ↓
Rod / pole length per window76 in
Curtain panels per window4
Curtain length96 in
Final fullness2.74×
Matching windows1
Room total panels4 total
Show mounting details

Where the wall brackets go

Left bracket
Right bracket

Your shopping list

Step 2
Compare curtains you found in a store
Paste the size and price from up to three product listings. Nenxo checks how many packs you need, whether the length works and what the real total cost will be.


Use the same measurements above. You can compare products from different stores side by side.




Curtain A
Your first option
Enter size
What to buy—
How full—
Length check—
Total price—


Curtain B
Second option
Enter size
What to buy—
How full—
Length check—
Total price—


Curtain C
Third option
Enter size
What to buy—
How full—
Length check—
Total price—


A useful detail stores often hide
Some curtains are sold as single panels and others as pairs. Nenxo converts everything into whole packs, so you see what you actually need to buy—not a fractional panel count.


Curtain sizing in plain English
What the numbers actually mean
You do not need to learn curtain jargon. These are the four decisions that matter before you order.


1. Rod width
The rod is usually wider than the window so open curtains can sit beside the glass. Nenxo checks your available wall space before suggesting a span.


2. Curtain width
Curtains need more fabric than the rod width or they look flat when closed. A classic everyday look is around 2× the rod width; the calculator does the multiplication for you.


3. Curtain length
Measure from the top of the planned rod to the floor. Then choose whether the fabric should sit just above the floor, touch it or gather slightly on it.


4. Number of panels
Nenxo divides the fabric you need by the width of one store panel and rounds up to whole panels—or whole packs in the comparison tool.




Example
A 60 in window with an 8 in rod extension
The rod becomes 76 in wide. At a classic 2× fullness you want about 152 in of flat curtain fabric. If one panel is 52 in wide, two panels are not enough, so Nenxo rounds the plan up to four balanced panels.
Try your own measurements


Before you click “buy”
Check the listing says panel or pair“52 × 96” may describe one panel even when the photo shows two.
Check the listed width is flat widthUse the product specification, not the gathered width in a styled photo.
Check the curtain lengthA curtain that is too short cannot be fixed by hemming; a longer one usually gives you more options.
Check the rod instructionsVery wide rods may need a centre support or different wall fixings.


Quick answers
Curtain sizes for common window widths
Pre-calculated with the same rules as the calculator: the rod extends 8 in (20 cm) past each side of the window, panels are 52 in (132 cm) wide and a centre-opening pair is rounded to an even number of panels. Your wall space, panel width or fullness may change the answer — run your own numbers.
Rod length and number of 52 inch curtain panels for common window widths
Window widthRod lengthPanels for 2× fullnessPanels for 1.5× fullness
36 in 91 cm52 in 132 cm2 2.00×2 2.00×
48 in 122 cm64 in 163 cm4 3.25×2 1.62×
60 in 152 cm76 in 193 cm4 2.74×4 2.74×
72 in 183 cm88 in 224 cm4 2.36×4 2.36×
84 in 213 cm100 in 254 cm4 2.08×4 2.08×
96 in 244 cm112 in 284 cm6 2.79×4 1.86×
108 in 274 cm124 in 315 cm6 2.52×4 1.68×
120 in 305 cm136 in 345 cm6 2.29×4 1.53×
144 in 366 cm160 in 406 cm8 2.60×6 1.95×
Curtain length is independent of window width: measure from the top of the rod to the floor and see the standard curtain size chart for the stock length that matches.


More ways to plan before you buy
Different windows, different questions
The main calculator is best for one window size. Use these tools and guides when a whole room has mixed openings or when you need to decide fullness and length before comparing products.
Interactive tool
Plan a room with different window sizes
Add several window or door sizes, set a quantity for each and turn them into one combined panel, pack and cost plan.
Open the room curtain plannerPanel count
How many curtain panels do I need?
Use rod width, fullness and the seller-listed flat panel width to get whole panels, packs, purchased fullness and optional total cost.
Calculate panels & packsRod width
How wide should my curtain rod be?
Turn window width plus your chosen side extension into a rod span and check left/right wall clearance separately.
Calculate rod lengthStock sizes
Which standard curtain size fits?
Match your rod width and height to US, UK or EU stock lengths and see how many panels of each common width you need.
Open the size chart & finderSewing
How much fabric for home-made curtains?
Turn rod width, length, fabric width and pattern repeat into drops, cut lengths and total yards or metres.
Calculate curtain fabricWidth decision
1.5×, 2× or 2.5× fullness?
See how the fullness multiplier changes total fabric width and why panel count can jump when curtains open in the middle.
Read the width & fullness guideLength decision
84, 96, 108 or 120 inches?
Measure from the planned hardware to the floor first, then compare that target with the ready-made lengths you actually find.
Read the curtain length guideBeyond size
Hardware, headings, fabrics & special windows
Plan rod vs track, curtain headings, light control, fabric behavior, patio doors and bay windows without repeating the sizing guides.
Explore all curtain guidesInstallation
Ready to hang the curtains?
Use a six-step run-sheet for rod height, bracket marks, level checks, wall verification, installation and the final movement test.
Open the installation guide
Your measurementsWindow width, clear wall and rod-to-floor height.
Your preferencesExtension, fullness, finish and opening style.
Your shopping answerWhole panels or packs, target length and real total cost.
Need help measuring?
Measure first, shop second
The measuring guide shows exactly where to place the tape and which numbers to write down before you open the calculator.
Open the 5-minute measuring guide
Frequently asked questions
How wide should my curtains be?
For a classic full look, the combined flat width of all curtain panels is often around twice the rod width. Nenxo calculates this from your actual rod span and rounds it to real panels.
Why can four panels be better than two?
Two panels may physically cover the window but still look stretched and flat when closed. Nenxo checks the total fabric width, not just whether the glass can be covered.
Do both sides of the window need the same wall space?
No. Enter the free wall space on each side separately. Nenxo warns you if the chosen rod extension would hit a corner, cabinet or other obstacle.
Can I compare curtains from different stores?
Yes. Enter up to three listings and Nenxo uses the same window measurements for all of them, so you can compare required packs, fit and total price fairly.
What curtain length should I buy?
Measure from the top of the rod to the floor, then choose the finish you want. Nenxo gives you the target length and the product comparison tells you whether a specific store length is too short, close to ideal or long enough to hem.
What if curtains are sold as a pair?
In the comparison section, set “Panels in one pack” to 2. Nenxo then calculates whole packs and the real total cost automatically.
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