A Guide to Measuring for Blinds: Step-by-Step Instructions

Accurate measurements are crucial when it comes to installing blinds. Whether you opt for inside-mount or outside-mount blinds, precise measurements ensure a perfect fit and optimal functionality.

This guide provides step-by-step instructions to help you measure blinds correctly. By following these instructions and using the right tools, you can ensure that your blinds fit seamlessly within your windows, providing privacy and light control and enhancing the overall aesthetic of your space. So, let’s dive into the process and learn how to measure blinds accurately.

Gather the Necessary Tools

Before you begin measuring for blinds, gathering the necessary tools is essential to ensure an accurate and efficient process. Here are the tools you will need:

Measuring tape: A reliable measuring tape is essential for obtaining precise measurements of your window dimensions. Make sure it is long enough to measure the window’s width and height.

Step ladder (if needed): If your windows are located higher up and are not easily accessible, a step ladder will help you reach the critical areas for measuring. Safety should always be a priority when using a ladder.

Pen and paper: Having a pen or pencil and a piece of paper to jot down your measurements is helpful. This will help you stay organized and ensure everything is clear when ordering or installing the blinds. Having these tools readily available allows you to streamline the measuring process and ensure you have everything you need to measure for blinds accurately.

Measuring inside mount blinds

Measuring inside mount blinds is a simple yet critical process for achieving a neat and tailored look. Follow these steps to measure accurately:

Measure the width: Take measurements at the top, middle, and bottom of the window opening. Use the narrowest width as your final measurement.

Measure the height: Measure the height on the left, center, and right side of the window opening. Choose the longest height measurement as your final dimension.

Note obstructions: Check for any window handles or locks and measure their distance from the window opening. By following these steps, you can confidently order inside mount blinds that perfectly fit your windows, creating a polished and stylish appearance.

Measuring outside mount blinds

When measuring for outside mount blinds, the process is slightly different to accommodate the blinds being mounted on the wall or window frame. Follow these steps for accurate measurements:

Measure the width: Determine how much coverage you want the blinds to have on each side of the window. Measure the total width from the outer edge of the desired coverage on the left to the outer edge on the right. Add a few inches for better light control and privacy.

Measure the height: Decide on the desired coverage above and below the window. Measure the total height from the top edge of the coverage to the bottom edge. Include a few extra inches for proper coverage and clearance.

Consider overlapping: If you have multiple windows close together, measure the distance between them and add extra width to allow for overlapping of the blinds.

By following these steps, you can ensure that your outside mount blinds provide the desired coverage and create a visually appealing and functional window treatment.

Double-checking the measurements

After taking initial measurements for your blinds, it is crucial to double-check them before placing an order or proceeding with the installation. This step helps ensure accuracy and prevents any potential issues. Follow these steps to double-check your measurements:

Review the measurements: Take a moment to carefully review the recorded measurements for your window’s width and height. Ensure that the numbers are correctly written down.

Compare measurements: Compare the measures you’ve taken at different points (e.g., top, middle, bottom for inside mount or left, center, suitable for outside support). They should be consistent. If there are any significant discrepancies, remeasure that particular dimension to confirm accuracy.

Consider obstructions: If obstacles are within the window frame, verify that you’ve accurately measured the distance between the block and the window opening. Ensure that you have accounted for any adjustments needed due to obstructions.

Measure again if in doubt: If you have any doubts about the accuracy of your measurements, it’s always better to measure again to be specific. Taking extra time to ensure precise measurements will save you from problems later.

By thoroughly double-checking your measurements, you can have confidence in their accuracy and order or install your blinds with peace of mind, knowing that they will fit your windows perfectly.


In conclusion, measuring blinds accurately is crucial for a proper fit and optimal functionality. By gathering the necessary tools and following the appropriate steps, such as counting the width and height, noting any obstructions, and double-checking measurements, you can ensure the blinds will fit seamlessly within your windows.