Curtain Installation Dubai
April 23, 2025

How to Measure Your Windows Correctly for Curtain Installation

Installing curtains is a great way to improve the look and feel of your home. But to get that perfect fit, you need to start with one important step—measuring your windows the right way. If your measurements are not correct, your curtains might end up too short, too long, too narrow, or too wide. This can spoil the whole look.

In this blog, we will guide you step-by-step on how to measure your windows correctly before installing curtains. Whether you’re planning to hang curtains yourself or get help from a professional, these tips will make sure your curtains fit perfectly.

Note: Looking for professional help with Curtain Installation Dubai? Let our team handle it for you—fast, neat, and stress-free. Contact us today to book your curtain installation and get the perfect look for your home

Why Accurate Measurements Matter Before Curtain Installation

Wrong measurements can lead to a bad finish

When you hang curtains that are too short or too long, it can make your room look unbalanced or untidy. Accurate measurements help your curtains hang neatly and improve the look of your space.

You save money and time

Getting the measurements right the first time saves you from buying the wrong curtain size or making changes later. It also saves you from repeat visits to the store or calling the installer again.

Custom curtains need exact sizes

If you’re planning to order custom-made curtains, exact window measurements are very important. A small mistake can make your curtains unusable.

Step-by-Step Guide: How to Measure Your Windows Correctly

Now let’s break it down in a simple and clear way. Follow these steps for the perfect fit:

Step 1: Decide How You Want to Mount Your Curtains

Curtains can be mounted in two ways:

Inside Mount

  • The curtain rod is fixed inside the window frame.
  • It gives a neat and fitted look.
  • It works best if your windows have deep frames.

Outside Mount

  • The curtain rod is fixed outside and above the window frame.
  • This style makes windows look larger.
  • It allows more light to come in when the curtains are open.

Tip: Most people go for outside mounts because they give more flexibility and a fuller curtain look.

Step 2: Collect the Right Tools Before Measuring

Here’s what you will need:

  • A steel measuring tape (not a cloth one)
  • A pencil and notebook or phone to note down measurements
  • A step stool or ladder (if your windows are high)

Tip: Always use a steel tape for better accuracy. Cloth tapes can stretch and give wrong results.

Step 3: Measure the Width of Your Window

For Inside Mount:

  • Measure the inside width of the window frame from one end to the other.
  • Take the measurement in three places – top, middle, and bottom – and use the smallest one.

For Outside Mount:

  • Measure the total width you want the curtains to cover.
  • Add 4 to 6 inches on each side beyond the window frame. This helps block light and gives your curtains a full look.

Example: If your window is 40 inches wide, measure 48 to 52 inches for outside mount curtains.

Step 4: Measure the Height (Length) of Your Window

For Inside Mount:

  • Measure from the top of the inside frame to the bottom.
  • Again, take the measurement in three places and use the shortest one.

For Outside Mount:

  • Start measuring from where you’ll place the rod (usually 4 to 6 inches above the frame).
  • Measure down to where you want the curtain to end:
    • Just below the window sill
    • To the floor
    • Puddling on the floor (for a dramatic style)

Tip: For floor-length curtains, leave about half an inch above the floor so the curtains don’t drag or get dirty easily.

Step 5: Decide How Full You Want Your Curtains to Look

Curtain “fullness” means how wide your curtain panels should be compared to the width of your window.

Basic Fullness

  • Curtain width = 1.5 times the window width (For a 50-inch window, curtain width should be 75 inches)

Standard Fullness

  • Curtain width = 2 times the window width (For a 50-inch window, curtain width should be 100 inches)

High Fullness

  • Curtain width = 2.5 to 3 times the window width (For a richer, hotel-style look)

Tip: If you’re using two panels, divide the total width by 2 for each panel.

Different Curtain Styles and How They Affect Measurements

The style of your curtain can change how you measure. Let’s look at a few types.

Eyelet or Grommet Curtains

  • These have metal rings at the top.
  • Measure from the top of the rod (not the top of the curtain).
  • Add 1 to 1.5 inches above the window frame for the rod placement.

Rod Pocket Curtains

  • These have a pocket at the top where the rod slips in.
  • The top of the curtain will scrunch a bit, so add extra height if needed.
  • Measure from the top of the rod to the desired bottom length.

Tab Top Curtains

  • These have fabric loops at the top.
  • The rod shows between the tabs.
  • Measure from the top of the tab for total curtain length.

Extra Tips for Special Window Types

Measuring Bay Windows

  • Measure each panel section separately.
  • Decide if you want one long curtain or multiple panels for each section.

Measuring French Doors or Sliding Glass Doors

  • Measure the full width of the door.
  • Add extra width (6 to 12 inches) on both sides so the curtain clears the door when open.
  • Measure from above the door frame to the floor.

Measuring Arched or Odd-Shaped Windows

  • These are better suited for outside mounts.
  • Measure the widest and tallest parts.
  • Consider getting custom-made curtains for a better fit.

Common Mistakes to Avoid When Measuring for Curtains

Not using a metal measuring tape

  • Cloth or plastic tapes can stretch and give wrong results.

Measuring only once

  • Always measure at least twice to make sure you didn’t make an error.

Forgetting to add extra width or height

  • Many people forget to add extra inches for the rod, curtain style, or light blocking.

Not writing down measurements immediately

  • It’s easy to forget the numbers if you don’t note them down right away.

Frequently Asked Questions (FAQs)

Can I install curtains without drilling holes?

Yes, there are tension rods and adhesive hooks available that allow you to hang curtains without screws or nails.

What if my curtains are too long?

You can hem them using fabric tape, a sewing machine, or by taking them to a tailor.

Is it better to hang curtains high above the window?

Yes. Hanging curtains 4–6 inches above the frame makes the room look taller and more open.

Do I need a professional to measure and install curtains?

Not necessarily. If you follow these simple steps, you can do it yourself. But if you’re unsure or have custom curtains, a professional can help.

Conclusion: Measuring Right Makes Curtain Installation Easy

Measuring your windows correctly is the first and most important step before installing curtains. It may seem simple, but taking the time to measure carefully can make a big difference in how your curtains look and function.

By following the steps in this guide—deciding your mount type, using proper tools, measuring accurately, and avoiding common mistakes—you’ll be ready to buy or install curtains that fit perfectly.

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