Typically, you can do this with a tape measure.

How to measure the width of a door. Run a tape measure along your door from the left corner to right corner, and record this number. Measure at the top, middle and bottom of your door opening. The width of the door should generally be two inches less than the interior width of your door frame.

Measure the width of the door. Open the door and measure from the inside of one jamb to the inside of the opposite jamb—this is the spot where the sides of the door would fit when closed. Measure height of exterior door;

Measure the internal door frame. However, you have to measure more than the slab and jamb. To measure the door jamb size you may need to remove any trim moulding or siding you have on the door.

Measuring the door width from left to right, run the tape measure well over the width of the door, excluding the surrounding frame and any other components. 91 cm, 81cm, or 76 cm. If you do not remove the trim measure from the inside edges of the trim or moulding,.

Measure the door slab take the width measurements take the height measurement take the thickness measurement 2. How to measure exterior door for replacement things. Using a tape measure, obtain the measurement from the top corner of.

The quick steps below can help you size the exterior door the right way. As for how to measure a door frame: To measure a wooden door frame, use a tape measure to measure the width of the door frame at the top, middle, and bottom.