How big will your puppy get? Upload a photo for instant AI breed detection, or enter your puppy's details for a veterinary-grade adult weight estimate based on AKC breed standards and Cornell University growth curves.
Choose your preferred method below. Photo detection is the easiest — just snap a picture of your pup.
Upload a photo of your puppy or dog
Our AI will identify the breed automatically
Three simple steps to know your puppy's future size
Snap a photo of your puppy and our AI identifies the breed instantly. Or type the breed manually if you know it.
Tell us how old your puppy is in weeks and their current weight. That's all we need.
See your puppy's projected adult weight range and a month-by-month growth curve based on real veterinary data.
Our predictions use the "Rule of Paws" growth multiplier method validated across thousands of dogs in peer-reviewed veterinary studies. Growth rates are calibrated by breed size category using data from the AKC, Merck Veterinary Manual, and Cornell University's College of Veterinary Medicine.
Reference ranges from AKC breed standards and veterinary literature
| Size Category | Adult Weight Range | Maturity Age | Example Breeds |
|---|---|---|---|
| Toy | 3 – 7 lbs (1.4 – 3.2 kg) | 9 – 10 months | Chihuahua, Yorkshire Terrier, Maltese, Pomeranian |
| Small | 12 – 25 lbs (5.4 – 11.3 kg) | 12 months | Beagle, French Bulldog, Pug, Shih Tzu, Boston Terrier |
| Medium | 25 – 55 lbs (11.3 – 25 kg) | 12 – 15 months | Labrador, Golden Retriever, Border Collie, Boxer |
| Large | 55 – 90 lbs (25 – 41 kg) | 18 months | German Shepherd, Rottweiler, Husky, Doberman |
| Giant | 90 – 180 lbs (41 – 82 kg) | 18 – 24 months | Great Dane, Saint Bernard, Mastiff, Newfoundland |
Sources: AKC Breed Standards, Merck Veterinary Manual 11th Edition. Individual dogs may vary based on genetics, diet, and health.
For known purebred dogs, our predictions are typically within 10-15% of actual adult weight based on the veterinary "Rule of Paws" multiplier method. Mixed breeds and very young puppies (under 8 weeks) have more variability. Genetics, nutrition, and health all affect final size.
Predictions are most reliable between 8 and 16 weeks of age for small/medium breeds, and between 12 and 20 weeks for large and giant breeds. Earlier predictions have wider confidence ranges.
We use a computer vision model trained on millions of dog images to identify breed characteristics from your photo. The tool shows you the top breed matches and their confidence scores. For mixed breeds, we use the most likely breed for the weight calculation.
Upload a photo and our AI will identify the most prominent breed traits. Alternatively, select "Mixed Breed (Small/Medium/Large)" based on the parent breeds you know. Our size-group predictions are still quite reliable for mixes.
Small breeds typically stop growing at 9-12 months. Medium breeds reach adult size by 12-15 months. Large breeds take 15-18 months, and giant breeds like Great Danes can continue growing until 18-24 months of age.
This tool is for informational purposes only. For concerns about your puppy's growth, nutrition, or health, always consult a licensed veterinarian. Regular vet check-ups are the best way to monitor healthy development.
