By: Sharon Dianora
Why use a puppy weight calculator? The simple answer is, it helps to predict how much your cute little puppy will weigh as an adult dog. Apart from the fact that it'll help you plan and prepare better, aren't you just a little bit curious of how big the little guy's gonna get?
If you know the breed, you may know what to expect (roughly), but there is so much variation in size it's hard to tell sometimes. And if you don't know the breed, or if its a mix-breed, then you may be entirely in the dark.
That's why using a puppy weight calculator can help you to estimate how much your puppy will weigh when fully grown.
At this point, you may be asking, are puppy weight calculators accurate?
The answer is they can be, but it depends on the formula used and the growth rate of the puppy. All puppies grow at different rates; however, breed size is a good indicator of how much weight they'll gain and how quickly.
That's why our puppy weight calculator uses the growth rate for each breed size to estimate the adult weight. A puppy weight calculator that doesn't use the breed size to predict the final weight may be off by quite a lot.
Typically dog breeds are split into five categories by size. These are; toy, small, medium, large, and giant. It's not an exact science, and many breeds will have some overlap. However, in general, the smaller the breed size, the quicker they grow, and the sooner they'll reach maturity. The bigger breeds mature slower and don't reach maturity until much later.
To use, enter his current weight, age, and breed size, and the interactive tool will do the rest. If you have a mix-breed dog, see our puppy weight charts to see which breed category your puppy falls into based on his current weight and age.
Puppy Weight Calculator
What is your puppy's age in weeks?weeks
What is your puppy's current weight (lbs)?pounds
What is your puppy's size?
Toy (less than 12lbs at adult weight)
Toy (less than 12lbs at adult weight)
Small (12lbs - 25lbs at adult weight)
Medium (25lbs - 50lbs at adult weight)
Large (50lbs - 100lbs at adult weight)
Giant (Over 100lbs at adult weight)
The smallest of all breeds are the toy breeds. Adult dogs that weigh less than 12lbs are considered toy breeds.
Toy breeds grow faster than larger dogs achieving their adult weight by eight or nine months. On average, they gain 5 -10% of their body weight daily, amounting to one to five ounces each week.
Most of their growth is experienced between 0 - 11 weeks.
Below is an exhaustive list of toy breeds as determined by the American Kennel Club.
Like toy breeds, small breed dogs also grow faster than larger breed dogs but on a slightly slower scale than the toy breeds. Small breeds reach their adult weight between eight and twelve months.
Small breed dogs weigh between 12 - 25lbs when fully grown.
Theses guys gain about 5 - 8 ounces each week, which is roughly 5 - 10% increase in weight daily. Most of their growth occurs between 0 - 11 weeks.
Below is an exhaustive list of small breeds according to the American Kennel Club.
Puppies that are considered a medium-sized breed, usually reach adult weight between nine and ten months old.
Dogs that are considered to be medium-sized are between 25 - 50 lbs at adult weight. Medium breed dogs do most of their growing between 0 - 16 weeks.
Large breed dogs grow slower than the smaller breeds and take 12 - 18 months to reach their adult weight. Large breed dogs weigh between 50 - 100lbs as adults. Their fastest growth period occurs between 0 - 20 weeks.
Last but certainly not least are the giant breeds of dogs. These are the majestic and lovable breeds that weigh over 100lbs. Giant breeds take longer to reach their adult weight, usually between 12 - 18 months; however, this can be as long as 2 or 3 years. Breeds within this category will gain 2 - 5lbs per week. Their quickest growth period happens between 0 - 25 weeks.
Then try using our puppy weight calculator to find out. The formula uses the growth rate of each breed size and the current age and weight of your puppy.
Hawthorne, A. J., Booles, D., Nugent, P. A., Gettinby, G., & Wilkinson, J. (2004). Body-Weight Changes during Growth in Puppies of Different Breeds. The Journal of Nutrition,134(8), 2027S-2030S. doi:10.1093/jn/134.8.2027sHome › New Puppy › Puppy Weight Calculator