Curtain Measurement Calculator

For puddle effect or extra drop

Your Curtain Measurements

Recommended Rod Width
Curtain Width per Panel
Total Fabric Width Needed
Curtain Length/Height

Note: These calculations are estimates. Actual requirements may vary based on curtain style, fabric type, and header style. Always add a few extra inches for hemming and seam allowances.

About Our Curtain Measurement Calculator

How to Measure for Perfect Curtains Every Time

Welcome to our comprehensive Curtain Measurement Calculator. Getting the perfect curtains starts with accurate measurements. Our calculator takes the guesswork out of this process, ensuring your curtains look professionally installed and function perfectly.

Understanding the Importance of Proper Curtain Measurements

Perfectly sized curtains can transform a room, making windows appear larger and ceilings higher. They provide the right amount of light control, privacy, and add a stylish finishing touch to your interior design. Incorrect measurements, on the other hand, can result in curtains that are too short, too narrow, or simply don’t hang properly.

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Precision Calculations

Our calculator accounts for fullness, rod extensions, and extra length to ensure perfect coverage and elegant draping.

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Multiple Mounting Options

Whether your curtain rod is mounted above the window, inside the frame, or from ceiling to floor, we provide accurate measurements.

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Customizable Fullness

Choose from different fullness options to achieve your desired look, from light and casual to luxuriously full drapery.

How to Use the Curtain Measurement Calculator

  1. Measure your window width from edge to edge using a metal tape measure for accuracy.
  2. Measure your window height from the top of the window frame to where you want your curtains to end.
  3. Choose your curtain fullness based on the look you want to achieve.
  4. Select your rod position to determine the right curtain length.
  5. Add extra length if you want a puddle effect or additional drop.
  6. Decide how far the rod will extend beyond your window (typically 6-12 inches total).

Understanding the Results

After calculating, you’ll receive four key measurements:

  • Recommended Rod Width: The ideal width for your curtain rod, including extensions on both sides.
  • Curtain Width per Panel: The width each panel should be when using a pair of curtains.
  • Total Fabric Width Needed: The total width of fabric required, accounting for fullness.
  • Curtain Length/Height: The finished length your curtains should be.

Frequently Asked Questions

What is curtain fullness and why does it matter?
Curtain fullness refers to how much wider the curtain fabric is compared to the area it covers. A fullness factor of 2x means the curtain width is twice the rod width, creating elegant folds and drapes. Higher fullness (2.5-3x) creates a more luxurious, fuller appearance, while lower fullness (1.5x) offers a more streamlined look.
How high should I hang my curtain rod?
For standard installations, mount the rod 4-6 inches above the window frame to make the window appear taller. For more dramatic effect, you can position the rod halfway between the window frame and ceiling, or even at ceiling height for a particularly elegant look that maximizes perceived height.
What length should my curtains be?
For a modern look, curtains should either hover just above the floor (½ inch), lightly touch the floor (“kiss” the floor), or puddle slightly with 1-3 extra inches. For more dramatic or formal spaces, a larger puddle of 6-8 inches creates a luxurious effect. Avoid curtains that end above the floor unless there’s a radiator or deep windowsill.
How do I measure for inside-mount curtains?
For inside-mount curtains (often used for kitchen windows or sunrooms), measure the exact width and height of the inside of the window frame. You’ll typically want a tension rod that’s slightly wider than your measurement to ensure a snug fit, and curtains that are the exact height of the frame.
Should I use one panel or two panels per window?
In most cases, two panels (one on each side) create a more balanced look and allow you to frame the window better. Single panels work well for smaller windows or when space on one side is limited. Our calculator assumes a pair of curtains, dividing the total width needed between two panels.

Expert Tips for Perfect Curtains

  • Always measure twice to ensure accuracy.
  • Consider the curtain heading style (rod pocket, eyelet, tab top, etc.) as this may affect length requirements.
  • For patterned fabrics, you may need additional width to match patterns.
  • Remember to account for hemming if you’re making DIY curtains.
  • For very wide windows, consider using multiple panels for easier opening and closing.

Our Curtain Measurement Calculator is designed to help homeowners, decorators, and interior design enthusiasts achieve professional-looking window treatments. By following the measurements provided by our calculator, you’ll create a polished, custom look that enhances your entire room.