How to Measure Curtains: A Simple Guide

Ever bought curtains online, excitedly awaited their arrival, only to find they’re completely the wrong size for your windows? You’re not alone. Measuring for curtains might seem straightforward, but even a small miscalculation can lead to frustration, wasted money, and windows that are either awkwardly exposed or drowning in fabric. Getting the right measurements is crucial for achieving the perfect aesthetic and functionality for your space, from light control and privacy to energy efficiency and overall visual appeal.

Accurate curtain measurements are the foundation for a successful window treatment project. Properly measured curtains will hang beautifully, provide the desired level of light filtering or blocking, and contribute to the overall style of your room. Neglecting this vital step can result in curtains that are too short, too narrow, or simply don’t complement your windows, leading to costly alterations or the need to start from scratch. So, let’s dive into the process and ensure your next curtain purchase is a perfect fit.

What are the most common mistakes people make when measuring for curtains?

How do I measure for curtain width, accounting for fullness?

To determine the correct curtain width, first measure the total width of the window or area you want to cover, including any desired overlap onto the wall on either side. Then, multiply this measurement by a fullness factor, typically between 2 and 3, depending on the desired level of fullness. A factor of 2 provides a moderate fullness, while a factor of 3 creates a more gathered and luxurious look.

Curtain fullness is essential for achieving an aesthetically pleasing and functional window covering. It refers to the amount of fabric used relative to the width of the window. Insufficient fullness will result in flat, lifeless curtains that don’t drape well, while excessive fullness can overwhelm the space and make the curtains difficult to operate. Common fullness factors are:

• 2x Fullness: This provides a moderate gather and is suitable for lighter fabrics and more contemporary styles.
• 2.5x Fullness: A good balance between fullness and fabric usage, creating a classic and elegant look.
• 3x Fullness: Ideal for heavier fabrics and creating a luxurious, dramatic effect.

For example, if your window width plus desired overlap is 50 inches and you want 2.5x fullness, you would calculate: 50 inches x 2.5 = 125 inches. This means you’ll need a total curtain width of 125 inches, which could be achieved with two 62.5-inch wide panels. Remember to round up to the nearest whole number for easier purchasing. Consider the rod pocket or hanging style when purchasing and ensure you purchase enough panels accordingly.

What’s the best way to measure curtain length for different mounting heights?

The best way to measure curtain length depends on the desired look and mounting height. First, install the curtain rod at your chosen height. Then, measure from the top of the rod (or the bottom of the rings if using rings) down to your desired curtain end point: floor length (grazing or pooling), sill length (ending at the windowsill), or apron length (a few inches below the sill). This measurement determines your finished curtain length.

Consider the visual impact of your mounting height. Mounting the rod higher above the window frame creates an illusion of height, making the room appear larger. When mounting higher, you’ll naturally need longer curtains to reach your desired endpoint. Standard practice is to mount the rod 4-6 inches above the window frame, but you can go higher for a more dramatic effect. Be sure to factor this added height into your length measurement.

It’s crucial to decide on the final curtain “break” or hem style before measuring. For a modern, clean look, curtains can just “kiss” or graze the floor. For a more romantic or traditional style, allow the curtains to “pool” slightly on the floor, adding a few extra inches to the length. Sill-length curtains are suitable for kitchens or bathrooms where you want to avoid floor contact. Always measure in multiple places across the window as floors and window frames are rarely perfectly level, and use the longest measurement to ensure adequate coverage. Account for any headings or pleats at the top of the curtain, as these will impact the overall finished length.

Should I measure with the rod already installed?

Yes, you should absolutely measure with the rod already installed. The rod’s placement and style significantly impact the overall look and functionality of your curtains. Measuring without the rod in place can lead to curtains that are the wrong length or don’t hang correctly.

By having the rod already up, you can accurately determine the distance from the top of the rod (or rings, if using them) to where you want the curtains to fall. This is crucial for achieving the desired aesthetic, whether you prefer them to graze the floor, puddle slightly, or fall just below the window sill. Consider the style of your curtains as well. For example, curtains with grommets will hang differently than those with rod pockets, and you’ll need the rod in place to account for that difference in height. Furthermore, the rod’s projection from the wall influences how the curtains will drape and block light. If the rod is too close to the wall, the curtains might not stack back properly when open, obstructing your window view. Measuring with the rod installed allows you to visualize and account for these factors, ensuring your final measurements accommodate the rod’s position and your desired level of light control and privacy. Using the installed rod as your starting point helps guarantee a professional and well-fitted look.

How do I measure for curtains that will be hung on a track system?

To measure for curtains on a track system, you’ll need to determine both the width and the drop (length). For the width, measure the entire length of the track, then add extra for fullness (typically 1.5 to 2.5 times the track length, depending on the desired pleat style). For the drop, measure from the top of the track to where you want the curtains to finish – this could be the sill, below the sill, or to the floor.

To elaborate on width, the fullness factor is crucial. Curtains look best when they are gathered, so you need more fabric than the straight length of the track. If you want a subtle gather, multiply the track length by 1.5. For a more luxurious, fuller look with deeper pleats, multiply by 2 or even 2.5. Remember to divide the total width by the number of curtain panels you plan to have (usually two) to determine the width of each individual panel. When measuring the drop, decide where you want the curtains to finish. Sill-length curtains typically end about 1/2 inch above the windowsill. Below-sill curtains usually extend 4-6 inches below the sill. Floor-length curtains should either kiss the floor (just touch it) or have a slight break (pooling slightly on the floor). Measure from the top of the track (where the curtain hooks or gliders attach) to your desired finishing point. Account for any rings or hooks that will add to the overall length. If your track is already installed, this is a straightforward measurement. If not, ensure you know the intended height of the track before ordering your curtains. Accurate measurements are essential for a professionally finished look.

How much extra length should I add for hemming?

For standard curtain hems, add at least 4 inches to your desired finished length. This allows for a double-fold hem of approximately 2 inches, which provides a clean, professional finish and adds weight to help the curtains hang nicely. For deeper hems or specific design details, you may need to add more.

The amount of extra length needed for hemming ensures you have enough fabric to create a neat and durable hem without sacrificing your desired curtain length. A double-fold hem is recommended because it encases the raw edge of the fabric, preventing fraying and providing a more polished look. Consider the weight and thickness of your fabric; heavier fabrics might benefit from a slightly wider hem (2.5-3 inches) for added weight and improved drape. If you are adding embellishments like trim or fringe to the hem, remember to factor their width into your calculations. Add the width of your trim *after* creating the hem so the trim lays correctly at the finished edge. It’s always best to err on the side of adding too much length rather than too little, as you can always trim away excess fabric. Before making any cuts, press the hem and test the drape to ensure you are satisfied with the overall look and length of your curtains.

What’s the difference between inside mount and outside mount measurements?

The key difference lies in where the curtains or blinds will be installed relative to the window frame. Inside mount measurements are taken within the window frame itself, aiming for a snug fit. Outside mount measurements are taken outside the frame, considering the desired overlap of the curtains or blinds onto the wall.

When measuring for an inside mount, precision is crucial. You’ll measure the exact width and height of the window opening within the frame where you intend to install the hardware. Remember to measure at the top, middle, and bottom for width, and left, right, and center for height, using the smallest measurement of each to ensure a proper fit. This method is ideal for a clean, streamlined look, showcasing the window frame itself. However, inside mounts might allow more light to leak in around the edges compared to outside mounts. Outside mount measurements offer greater flexibility in terms of light control and window coverage. For width, you’ll determine how far you want the curtains or blinds to extend beyond the window frame on each side. This overlap is crucial for blocking light and providing privacy. For height, consider how far above the window frame you want the hardware to be installed to visually elongate the window and how far below the sill you want the curtains to fall. An outside mount can also be a good choice if your window frame isn’t deep enough for an inside mount or if you want to conceal an unattractive frame.

How do I measure for tie-back curtains?

To measure for tie-back curtains, first determine your desired curtain length and width as you would for regular curtains. Then, decide where you want your tie-backs to sit on the curtain panel – typically about one-third of the way up from the bottom – and factor in extra fabric width (usually 6-12 inches per panel) to accommodate the gathered effect created by the tie-backs.

Choosing the placement of your tie-backs is crucial for the final look and functionality. A lower placement creates a fuller, more dramatic drape at the bottom, while a higher placement allows more light to enter and can make a smaller window appear taller. To visualize, temporarily hang a piece of fabric or even paper at your window and experiment with different tie-back positions. Pin the fabric to see how it looks gathered. Remember to account for the “return,” or the amount of fabric that wraps around the side of the rod to the wall, especially if you’re using a decorative rod. This ensures your curtains cover the window adequately when closed. Finally, before ordering or cutting your fabric, consider the weight of the fabric and any lining you plan to use, as heavier fabrics will drape differently and may require slightly more width for the gathered effect.

And there you have it! Measuring for curtains doesn’t have to be a headache. Hopefully, these tips have made the process a little clearer and easier. Thanks for reading, and be sure to come back soon for more helpful guides and inspiration!