Curtain Size Calculator

Find the right curtain width and length for your window.

Enter your window size, choose a style, and get recommended dimensions instantly.

Enter Your Window Size

Input the window dimensions and curtain style.

How to Use

Get your curtain size in 3 simple steps.

Enter or Select

Input your window width and height, then choose a curtain style (e.g., Standard 1.5×).

Calculate

Click the Calculate button to get the recommended curtain width and length.

Review & Share

Check the results and visualization, then use Share or Copy Link to share this page.

Reference Guide

Useful information to choose the right curtain size and style.

Calculation Formula

Curtain Width = Window Width × Fullness
Curtain Length = Window Height
(+ optional adjustment)

ExampleIf the window is 180 cm wide and you choose Standard (1.5×):180 × 1.5 = 270 cm (curtain width)

Fullness (Style) Guide

Style	Multiplier	Look & Best Use
Light	× 1.2	A neat, minimal look. Good for small spaces.
Standard	× 1.5	A balanced, natural drape; a versatile choice.
Full	× 2.0	A rich, luxurious look with deeper folds. Great for living rooms and bedrooms.

Length Adjustment (Optional)

ShortMeasure the desired lower edge

StandardSame as window height

Floor-LengthMeasure rod to floor

Tips & Notes

Measure the window width and height accurately (cm or inches).
Standard fullness (1.5×) works well in most spaces.
For a soft, luxurious look, choose Full fullness (2.0×).
For a floor-length curtain, measure from the hanging point to the floor and subtract your desired clearance; the calculator does not make this adjustment.

Real-world Examples

See how the calculator works in real situations.

Example 1

Living Room (Large Window)

Window size: 240 cm (W) × 200 cm (H)

Style: Standard (×1.5)

Result: 360 cm (W) × 200 cm (L)A natural and full look for a bright living room.

Example 2

Bedroom (Standard Window)

Window size: 150 cm (W) × 140 cm (H)

Style: Standard (×1.5)

Result: 225 cm (W) × 140 cm (L)A well-balanced size that creates a cozy feel.

Example 3

Small Window (Kitchen)

Window size: 90 cm (W) × 100 cm (H)

Style: Light (×1.2)

Result: 108 cm (W) × 100 cm (L)A simple, neat look that fits small spaces.

FAQ

Common questions about curtain sizing.

Q. What is “fullness,” and which option should I choose?

Fullness is the extra width of the curtain compared to the window width. It creates fabric folds (drape) for a more attractive look.

Light (×1.2): A simple, neat look (good for small spaces).
Standard (×1.5): A balanced, natural look (recommended for most cases).
Full (×2.0): A rich, luxurious look with deeper folds (great for living rooms and bedrooms).

Q. Should the curtain length be the same as the window height?

By default, the reference length equals the window height you enter. It is not the finished hanging drop: measure from your chosen hanging point and allow for the header, hem and floor clearance before ordering.

Q. How do I choose between a window-length and floor-length curtain?

For a window-length curtain, measure from its hanging point to the intended lower edge. For a floor-length curtain, measure from the hanging point to the desired clearance above the floor; window height alone cannot determine this.

Q. Do I calculate the width per panel or the total width?

The result is the total flat width for all panels combined. Divide it by the number of panels you plan to hang.

Q. What units can I use?

Yes. Choose cm or in separately for width and height. One inch equals exactly 2.54 cm.

Q. Can I use this calculator for blackout or sheer curtains as well?

Yes. The formula does not depend on opacity; choose the fullness that suits the fabric and check the product specifications.

Q. What should I keep in mind when buying ready-made curtains?

Compare the calculated total flat width with the combined listed widths of all panels. Check each panel size, overlap and mounting details before buying.