Picking the right curtain size is key to making your windows look just right and adding a touch of style to your space. The Window Curtain Calculator takes the guesswork out of it by helping you figure out the ideal curtain size based on your window’s measurements, how full you want the fabric to look, and where your curtain rod is placed. This is very easy to use tool that saves you from the hassle of buying too much fabric or ending up with too little. In this blog, we’ll walk you through how the calculator works, explain the formulas it uses, and give you a clear example to make everything easy to understand.

How to Calculate Window Curtain 

To get the perfect curtain width and height, you’ll need to consider two things: Here’s the formula to help you figure it out:.

$\text{Curtain Width} = \text{Window Width} \times \text{Fullness Factor}$

The Fullness Factor depends on how gathered you want the curtains to be:

• Standard Fullness (1.5x) – Light gathering
• Medium Fullness (2x) – Regular gathering
• Heavy Fullness (2.5x - 3x) – Luxurious look

Formula for Curtain Height Calculation

The height of the curtain depends on where you want to place the rod and how long you want the curtains to fall. The formula is:

$\text{Curtain Height} = \text{Rod Height} - \text{Window Height} + \text{Additional Length}$

The Additional Length can vary based on the curtain style:

• Floor-Length: Extra 10-15 cm
• Puddled: Extra 20-30 cm
• Sill-Length: Aligns with the window sill

Example Calculation

Let’s assume you have the following details:

• Window Width: 1.5 meters
• Fullness Factor: 2x
• Rod Height: 2.5 meters
• Window Height: 1.8 meters
• Additional Length: 10 cm

Step 1: Calculate Curtain Width

$\text{Curtain Width} = 1.5 \times 2 = 3 \text{ meters}$

Step 2: Calculate Curtain Height

$\text{Curtain Height} = 2.5 - 1.8 + 0.1 = 0.8 \text{ meters}$

Conclusion

The Window Curtain Calculator allows you to quickly figure out what size curtain you need for your windows so that it fits right and looks stylish. Whether you want a simple drape or a beautiful flow, this tool makes it easy to measure — and thus keep accurate. So, give it a try right now and give a boost to the décor of your home without any extra effort!

FAQ

How do I measure a window for curtains?

To measure the curtain sizing for a window, find the width of the window and multiply that number by a fullness factor (1.5x for light gathering, 2x for standard and 2.5 to 3x for luxe). For height, measure all the way from the curtain rod to your desired length (sill-length, floor-length or puddled).

Which fabric is best for window curtains?

The right fabric for you will depend on your needs. Lightweight fabrics such as cotton and linen create a breezy feel while heavier weights like velvet and blackout materials are better for privacy and insulation. Sheer fabrics are lovely for diffused lighting and thermal curtains are good for energy efficiency.

How high should I hang my curtain rod?

For a more elegant look, mount the curtain rod 4 to 6 inches above the window frame or closer to the ceiling to create the illusion of height. Ensure the rod extends beyond the window width to allow the curtains to fully open.