Free puppy growth tool
Is my puppy a healthy weight?
Enter your puppy's breed, weight and age. We'll show the healthy weight range for its age, whether it's on track, and the typical adult size for the breed, using WALTHAM growth science. Built for puppies up to about 24 months.
Expected weight now
Typical adult (breed)
Free 12-page guide
Get the puppy years right
It's great that you're tracking growth, the first year shapes a dog's whole life. Our free Longevity Guide covers how dogs develop, the foundations of healthy growth, and the habits that add years.
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Estimates are based on WALTHAM Petcare Science Institute size-category growth research and your breed's adult weight range. Individual puppies vary with genetics, neuter status, sex and nutrition, so treat this as guidance, not a diagnosis. Your veterinarian can confirm whether your puppy is growing healthily.
How the puppy growth estimate works
The WALTHAM Petcare Science Institute built growth standards from over 6 million weight measurements across 50,000 healthy puppies, the same way pediatric growth charts work for children. Puppies of each size category reach a predictable percentage of their adult weight at each age, so from your puppy's current weight and age we can show the healthy weight range for that age, check whether growth is on track, and show the typical adult size for the breed.
When puppies stop growing
Smaller dogs finish first: toy and small breeds are usually full-grown by 10-12 months, medium breeds by 12-14 months, large breeds by 14-18 months, and giant breeds keep developing until 18-24 months. Bigger dogs grow for longer, which is exactly why large-breed puppy nutrition matters.
Why growing too fast is a risk
In large and giant breeds, growing too quickly is linked to developmental joint problems like hip dysplasia. Steady, lean growth, not maximum growth, is the goal. See our joint health guide for the support side, and check your adult dog with the Dog Weight Checker.
Common questions
How accurate is this weight check?
It's a guide, not a diagnosis. It's most reliable after about 12-16 weeks, once early growth has settled. Mixed breeds and unknown parentage add uncertainty. Your vet's body condition score is the final word.
My puppy is a mixed breed, what do I pick?
Pick the breed it most resembles, or the larger parent for a safer upper estimate. The size category drives the growth curve more than the exact breed.
Is my puppy underweight or overweight?
This tool compares your puppy to the expected weight for its age and breed. Below the expected band can mean a lean or smaller individual; well above can mean fast growth. Either way, confirm with a vet body condition score.
Where does the data come from?
The growth model uses WALTHAM Petcare Science Institute size-category growth research and your breed's published adult weight range. It is educational guidance, not a diagnosis.
