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How to Measure Your Pet for a Pet Door

How to Measure Your Pet for a Pet Door

How to Measure Your Pet for a Sliding Glass Pet Door

Pet doors are a convenient way to give your cat or dog access to both outdoors and indoors, even when you’re not home. This is especially helpful to pet owners who work long hours and can’t always let the pets out for bathroom breaks. Having a pet door for cat or dog helps eliminate accidents during housebreaking and can reduce overall training time. It also prevents boredom by providing all the mental and sensory stimuli the outdoors has to offer. Boredom leads to a number of unwanted behaviors like chewing, so an entertained pet means less household destruction.

It’s important to install the correct size door for your pet or pets in order to prevent injury to the animal and undue damage the door. To begin, you will need a tape measure and you will want to measure the largest pet that will be using the door.

Sizing Up Your Pet

Using your largest pet, take the following measurements:

  1. Measure across the widest part of the pet, usually the chest, then add one to two inches to this number for door width
  2. Double-check your width by opening the door this amount, then having the pet step through
  3. Measure from the ground to the highest point of your pet’s back (not the head), usually the top of the shoulders
  4. Measure from the ground to the lowest point on your pet’s underside (in some breeds, this is the stomach, while in other breeds, it will be the chest)
  5. Subtract the low-point number (belly) from the high-point number (shoulders), then add one to two inches to get your door opening height
  6. Rise (how far the pet has to step up to use the door) plus your door opening height should be one to two inches higher than the tallest pet’s shoulder height

Cardboard Test

Before you order your sliding glass pet door, it’s a great idea to confirm your pet’s measurements. In addition to taking all the measurements a second time, you can make an easy mock-up of your dog door. Using your final measurements, draw a rectangle of those exact dimensions on a piece of cardboard or poster board. Make sure the bottom of your rectangle is situated at the same rise height that you want your pet door. Cut out your rectangle, then have a friend hold up the poster board while you coax your dog to step through it. If he fits with no problems, you’re all set to start the installation of your pet door.

Tips to Remember When Measuring Your Pet for a Pet Door

Your dimensions should be large enough to comfortably accommodate your largest pet. They should not have to crouch or stoop to fit through, as this repetitive action can lead to a strain injury to the neck or back. However, your smallest pet should be able to easily see and step through as well, so factor that into your rise height. Keep in mind that as pets age, it may be more difficult for them to step through a high rise. When in doubt, always go with one size larger rather than smaller. For more information on measuring your pet for a pet door or any of Advanced Windows USA‘s services, head on over to our contact page or call us at 801-505-9622.

Download a PDF on how to measure your pet for a pet door.

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Sandra Sk AvatarSandra Sk
I couldn't ask for a better group of hardworking men who did a professional job! Mario, Francisco, and Martin are amazing guys who did a fabulous job! I didn't even know they were here! They cleaned up any and all messes while they were working and when they were done with the job! Communication with the crew was absolutely great! I would reccommend Advanced Windows to anyone, they won't disappoint! I promise you this my friend's! - 2/19/2026 
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John Taylor AvatarJohn Taylor
Advanced Window just replaced three of my windows that were aging and leaking. Eli was the installer and he was excellent. He was extremely knowledgeable and demonstrated an attention to detail and professionalism The new windows matched perfectly and they work just as designed. In addition, Eli cleaned up the work area and left it pristine. The windows were also cost effective. I highly recommend them if you need replacement windows. - 2/10/2026 
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Angel and team did a great job installing my new windows and patio door and wow the difference in noise and heat coming in is amazing. - 2/07/2026 
Kathryn Robinson AvatarKathryn Robinson
We are very happy with our windows. We had an unfortunate rough start but the company moved quickly to solve the problem and our experience from then on was very positive. All Communication with the company was helpful and friendly. Our satisfaction was always their goal. The installers were friendly, careful, respectful and very competent. They completed the installation much faster than we expected and they left everything in perfect condition. We would definitely recommend Advanced Windows to everyone. - 2/06/2026 
McKay Roberts AvatarMcKay Roberts
Got canvased and next thing I know I was buying all new windows and sliding glass doors. We had them do a custom color to paint match some blue trim and it turned out perfectly. The sliding glass doors are also pretty slick with a cool locking feature to make sure they get shut all the way. The only hiccup was one of the windows didn’t fit upon install but they expedited getting another one made which I was really pleased with. Overall I was extremely happy with my purchase and would recommend to others. - 2/05/2026 
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Doug Woodley AvatarDoug Woodley
Advanced windows replaced 4 windows in our house. The whole window replacement took about 4 hours. The installers were very efficient and professional. I would certainly recommend Advanced Windows, and would use them again. - 2/04/2026 
Vicki Henderson AvatarVicki Henderson
We love our new windows! The process from start to finish was smooth. The crew arrived on time and finished installing 15 new windows in one day! I was very impressed. You can’t beat the lifetime warranty and the quality of the windows and installation is top notch. We were well overdue for new windows and the result is fantastic! - 2/03/2026 
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