If you plan to order a new entry door, you will need several measurements to ensure a proper fit. Taking your own measurements will allow you to discuss several door options with a manufacturer before making any final decisions about your door. However, some people may prefer to hire a contractor to take the measurements and order the door for them. If you are taking your own measurements, make sure you are using a well-calibrated measuring tape and proper measuring techniques before taking the following measurements. 

For a Pre-hung Unit (The Door and the Frame)

If your current door frame is damaged or does not match your new door style, you will want to order a new frame as well as the door panel. If you plan to remove and replace your entire door unit, you will need the following measurements: 

  • Width of opening from stud to stud. 
  • Height of opening from floor to stud. 

To get these measurements, you may have to remove some of the molding or plaster around your door frame. You should do this on the inside of the door, removing in small amounts until you find the wooden studs of your doorway. 

For Just a Door Panel (Using Your Existing Frame)

If you plan to keep your current frame and only install a new door panel, you will need significantly more measurements. 

  1. Top of the door to the top of each hinge. Some doors have three hinges and some have four, depending on their height. Make sure to note whether you want three or four hinge guides drilled in your door and take a measurement for each hinge. 
  2. Height and width of hinges. When measuring the hinges, make sure the hinges are open and you measure the full width of the hinge. You may also want the width of each panel of the hinge. Talk to your contractor or manufacturer to see if this is a necessary measurement. 
  3. Top of door to the center of the deadbolt and lockcase. Measuring to the center of your deadbolt and lockcase allows for the appropriate placement of these items. Make sure to not measure to center of these items as opposed to the top, as each door can use a different size of deadbolt case or lockcase. 
  4. Side of the door to the center of the deadbolt and lockcase. Since the deadbolt and lockcase are stacked directly on top of each other, these two measurements should be the same. However, make sure to measure both to double check your measurements and ensure a proper fit. If your measurements are not the same, call your door manufacturer to ask for advice before placing an order. 
  5. Height and width of your current panel. When measuring the height of your door, only include the solid panel part. Do not include the door sweep on the bottom of the door. If you have any sealing strips around your door, do not include them in the measurement, either. 
  6. Height and width of your current frame. Some manufacturers may want the height and width of your frame as opposed to your current panel. However, this is not as common as measuring the actual panel. Make sure you note which measurements you took when discussing panel possibilities. 

If you are unsure of your measurements, you may want to hire a contractor to take the measurements for you. This will allow you to order a properly prepped door the first time and not waste time or money with wrong orders. However, even taking rough measurements can help you start a conversation with your contractor about your entry door needs.