How To Measure Windows For Square Feet

Measuring the square footage of windows can be useful in custom window installations or when determining the amount of add-on materials, like solar-blocking films, that are necessary to coat the windows. You can do the job quickly with just a few simple tools and calculations.

Step 1

Stretch a tape measure across the bottom of the window glass. Record the measurement in inches.

Step 2

Stretch the tape from bottom to top. Record the measurement in inches.

Step 3

Multiply the two numbers together. Divide the result by 144 to get the resulting square foot measurement.