Curtain Measuring Mistakes and How to Avoid Them

Measuring for curtains may seem straightforward, but it’s surprisingly easy to get wrong. As one of the UK’s leading experts in blinds and curtains, DotcomBlinds has seen it all—from misjudged measurements to mismatched hardware. These common errors can turn a simple project into a frustrating experience.

The good news? With a little expert advice, you can avoid these pitfalls and achieve perfectly fitted curtains every time. In this guide, we’ll walk you through the most frequent curtain measuring mistakes and show you how to get it right. Whether you’re a seasoned decorator or tackling your first curtain installation, DotcomBlinds is here to ensure your curtains look flawless and function beautifully.

Understanding Pole or Track Placement: Getting the Basics Right

One of the most common mistakes in curtain measuring is neglecting to properly position the pole or track. It’s easy to assume that any placement will do, but the position of your pole or track directly impacts the look, functionality, and fit of your curtains. A poorly placed track can make your curtains look awkwardly short, too wide, or even limit how smoothly they open and close.

The Mistake:

Installing your pole or track too low, too high, or too narrow. For example, placing the pole too close to the window frame can block light, while installing it too high can leave your curtains looking stretched.

How to Avoid It:

Measure carefully before installing your curtain hardware. Aim to position the pole or track 10-15cm (4-6 inches) above the window frame and extend it 15-20cm (6-8 inches) beyond each side. This allows for better light coverage and ensures your curtains hang elegantly. For floor-length curtains, ensure you account for the drop to avoid a gap or excess fabric pooling. Taking time to plan your pole or track placement will set the stage for perfectly hung curtains.

Mastering Measurements: CM vs. Inches

Measurement mix-ups are surprisingly common, especially when switching between centimetres and inches. A tiny error in measurement can throw your entire curtain project off balance, leading to poorly fitting curtains that either drown your window in fabric or barely cover it.

The Mistake:

Confusing centimetres with inches when taking measurements or ordering custom curtains. For instance, mixing up 100cm (about 39 inches) with 100 inches can result in a massive discrepancy.

How to Avoid It:

Decide whether you’ll use centimetres or inches and stick to one system throughout the process. Use a measuring tape that clearly displays both units and double-check your notes before placing any orders. When ordering online, carefully check the unit system displayed online. Our site allows for millimetres, centimetres, and inches, so make sure that your measurements are the same as those you're inputting. Staying consistent with your measurements will save you time, frustration, and the hassle of returns.

Measuring Matters: Why Accuracy is Key

Taking incorrect measurements is one of the most significant and costly mistakes when it comes to curtains. Rushing through measurements or failing to account for essential details can result in curtains that are too short, too long, or ill-fitting.

The Mistake:

Measuring only the width or the height of the window without considering the full area the curtains need to cover. Skipping over minor adjustments like overlap or drapery style can also lead to poor results.

How to Avoid It:

Use a proper steel measuring tape for accurate results. Measure the width of the window, adding an additional 30-40cm (12-16 inches) to allow for proper curtain stacking. For the height, measure from the pole or track to the desired drop point (e.g., floor, sill, or below the sill). Always double-check your numbers to avoid errors. When in doubt, take a few extra minutes to re-measure.

Getting the Right Fabric Coverage: Don’t Skimp!

Insufficient curtain fabric is a mistake that can leave your windows looking bare or your curtains unable to close properly. This often happens when you underestimate the fabric width or fail to consider the curtain style.

The Mistake:

Not allowing enough fabric for pleats, folds, or overlaps. Curtains that are too narrow for the window look awkward and fail to provide adequate coverage.

How to Avoid It:

A general rule of thumb is to have fabric that’s 1.5 to 3 times the width of your pole or track, depending on your chosen curtain style. For example, pencil pleats require more fabric for fullness than flat panel curtains. Check our product description for your guide for the exact fabric-to-width ratio based on your curtain type.

The Importance of Multiple Measurements: Avoiding Costly Errors

Measuring a window just once can lead to costly mistakes, especially if your measurements aren’t perfectly accurate. Walls, window frames, and even floors can be slightly uneven, and relying on one measurement might not account for these irregularities.

The Mistake:

Only taking one measurement and assuming it will apply to the entire window or area. Variations in height or width can make your curtains look uneven once installed.

How to Avoid It:

Take at least three measurements for both the width and height of your window—top, middle, and bottom. Use the smallest measurement as your final width to ensure the curtains fit neatly. This method accounts for any irregularities and guarantees a seamless look.

Considering Curtain Types: One Size Doesn’t Fit All

Choosing curtains without considering their type can lead to installation headaches and style mismatches. Each curtain type—pencil pleats, rod pockets, or eyelets—has unique requirements for fabric width, pole style, and installation.

The Mistake:

Failing to account for the curtain type, which can result in mismatched hardware or curtains that don’t hang properly.

How to Avoid It:

Decide on your curtain style before measuring or purchasing. For example, eyelet curtains require a pole, while rod pocket curtains need a rod with no rings. Check the recommended pole diameter or track type for your chosen curtain style to ensure compatibility.

Choosing the Right Hardware: The Final Touch

Using the wrong hardware can completely undermine your curtain installation. From poles that are too weak to hold heavy drapes to tracks that don’t match your curtain style, hardware mistakes are often overlooked but can lead to frustrating results.

The Mistake:

Installing poles or tracks that can’t support the weight of your curtains or don’t suit their style. For instance, pairing a delicate rod pocket curtain with a heavy, oversized pole creates a visual and functional mismatch.

How to Avoid It:

Choose hardware designed for your specific curtain style and weight. Heavier curtains require sturdier poles or tracks, while lighter fabrics work well with slimmer designs. Check for compatibility with your curtain type and ensure the hardware can handle the fabric’s weight and movement.

Curtain Measurement Help at DotcomBlinds

Measuring for curtains doesn’t have to be daunting, especially with DotcomBlinds by your side. Our step-by-step Curtain Measurement Guide is packed with expert advice to help you measure with confidence and achieve a perfect fit.

Ready to find the ideal curtains for your home? Explore our stunning range of curtains to suit every style and space. If you still have questions or need personalised assistance, our friendly team is just a click away—reach out to us via our contact page.

At DotcomBlinds, we’re committed to making your curtain journey seamless, from measuring to installation. Let us help you get it right the first time!