How To Measure for New Windows or Window Blinds

January 01, 2010

For any upgrade to windows, such as replacement windows or new window blinds, a proper, accurate measurement is needed. Make a list, check it twice - the measurement that is. For each room, note the number of windows, the type of current window installed and the function of the room.

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Draw a picture of each window, it makes it much easier for reference and to avoid confusion. Make sure to note the measurement in the nearest 1/8 inch increment. Measuring more than once to ensure accuracy can save you from costly measuring mistakes.


To measure the width of the window, open it first. Measure the width between the jambs. Measure three times, at the bottom, middle, and top of the window in case the old jamb is warped. If there are discrepancies between the three measurements, use the narrowest measurement. Note all measurements on your diagram.


Measure the height of the window with the window open. Measure between the jambs, and again, measure on each side and the middle in case the jamb is warped. Use the shortest measurement to ensure an accurate fit.

Note in your drawing if there is any aluminum framing or weather stripping within the jamb or any other notes that are needed to accurately fit the window.

Accurate measurements are critical in getting the most efficiency and best value for your window. The measurements are normally required for estimates, so have them handy when you begin shopping for replacement windows.

Do as much research as you can to make an informed decision - the right window choice will add value to your home and the cost of the window can be recouped in added value and energy efficiency.

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