If you are interested in replacing or installing new doors on your home, the first step you need to take is to become aware of how to take accurate measurements for a door. You do not want to arrive home with a door that is too small or too big for your door frame. There are some steps that you should take to measure a door properly. First, you want to start by measuring the width. Measure the door from the left edge of the door to the right edge, horizontally. Do this three times and record the smallest measurement. Next, you want to measure the height of the door. Measure the door from top to bottom, vertically. Do this three times and record the smallest measurement. If your door has weatherstripping, do not include this in the measurements. Lastly, you want to measure the door jamb (depth of the wall). Measure this from the interior trim to the exterior trim. Do this three times, and record the smallest measurement. By following these three steps, you should be able to accurately the door’s measurements.