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.
Calculate the square footage of a window in just a few steps.
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.