« Back to Puppies

20–23 Weeks: What to Expect From Your Puppy

Tips to Curb Your Puppy's Adolescent Urges :: Five Ways to Deter Your Puppy's Chewing :: How to Calculate Your Puppy's Adult Weight :: A Checklist for Getting Your Puppy Spayed or Neutered

How to Calculate Your Puppy's Adult Weight

This may seem superfluous but knowing your puppy's adult weight can save you time and money. It can be tough to decide on a crate size or even something as big as a car if you don't have any idea how big your puppy will be when he's grown. Likewise, you can prepare now for illnesses or disorders associated with small or large dogs, such as foot problems or Hip Dysplasia.

If you've adopted a purebred puppy, you can guess fairly well what his weight will be when he's grown. But there have been known mutants within a breed, such as "Superpug" from Arkansas who weighs three times the size of a normal Pug. Likewise, there have been known microscopic dogs, such as "Dancer," a Chihuahua from Florida who weighs only 18 oz.

If you have a mixed breed puppy, you can get an idea of his upcoming size by determining what breed(s) he most looks like or doing a DNA Test. But, in all the cases, there's no surefire way to know. That's where a simple calculation comes in handy.

Using this calculation can help you plan for your dog's future and, if you're a really organized person, it means you can develop your pet budget for food, collars and so on.

  1. Categorize your puppy as either small, medium or large based on his breed or the breeds you think he has in him.

  2. Calculate your puppy's age in weeks, which is easy because this is week 22.

  3. Weigh your puppy.

  4. Now here's the actual calculation: GROWTH = Current weight in lbs / by Age in weeks; ADULT WEIGHT = Growth x 52

  5. For example, take a Beagle who is thirteen pounds at 22 weeks. GROWTH = 13/22 = .5909 lbs/week and ADULT WEIGHT = .5909 x 52 = 30.72 lbs

Based on your pup's category, small and medium sized puppies' growth is slowing at this time, while large puppies are still growing fast. Also, males are usually larger than females. If you have a purebred, you can also check with your breeder about the average size of dogs in your puppy's lineage.

Keep in mind this provides an estimated adult weight. Many factors play a role in a puppy's growth, including nutrition, health, pre-existing conditions and illnesses. A puppy who has Distemper, for instance, will often have their growth stunted. So keep those good, healthy meals coming, get your pup lots of exercise and make sure he's had all his vaccinations. With luck and heredity on your side, you might end up with a star basketball player.

Advice from Other Dog Owners 

How to Keep Your Puppy Off the Christmas Tree

Puppies should be supervised at all times. She or he should be crated while alone, leashed while you are around. Time to teach the "leave it" command. You will really mean it when you fear for the dogs safety! Baby gates might deter him - unless he's that curious kind that looks to defeat all confinement. If he's leashed it's easy to give a sharp leash correction if he goes near the tree. Put the tree up for a few days without trimming to get the dog used to it without risking fragile ornaments.

~Liz C., owner of German Shepherd mix


When Puppies Lose Their Teeth

Puppies have a full set of 28 milk teeth - 4 canines, 12 incisors and 12 molars. The incisors and canines grow in first, the molars last. At around three to four months of age, your dog is going to start losing milk teeth and growing in her adult set of teeth, which consists of a total of 42 teeth - a lot more than the puppy teeth she has. The first to fall out are going to be her incisors, her front teeth. She will start growing her adult incisors first. Around four to five months of age you will see her adult molars and canines to grow in. By about six months, she should have her full set of adult teeth.

~Chris & Brian C., owner of German Shepherd

Add Your Own Advice 


Comment headline
Your comment
Submitted by
Owner of