How big will my puppy get?
Puppies reach a predictable share of their adult weight at each age, and that share depends on size category - toy breeds finish growing months before giants do. Tell us your puppy's age, current weight and size group for a ballpark adult weight.
At this age your puppy has reached roughly - of its adult weight.
How it works: puppies hit known milestones - small breeds are about half their adult weight by ~4 months, large breeds by ~5 months, giants a bit later. We divide the current weight by the share reached at this age. Breed, sex and genetics shift the real number, so treat this as a friendly estimate.
How this works
- Your puppy's weight is divided by the share of adult weight a puppy of its size class usually carries at that age, read off a growth curve for the class (toy, medium, large, giant) and interpolated between ages.
- The ends of the curves follow the WALTHAM growth-chart study of more than 6 million young dogs (PLOS ONE, 2017): very small dogs reach adult weight at 8-12 months, larger breeds take up to 24 months. The points in between are our approximation of those curves, not a published table.
What it leaves out:sex, neutering age, breed lines and mixed breeds - the same study found wide differences between individual dogs, so treat the result as a range and track the real weight.
Estimates are least reliable for very young puppies (under ~8 weeks) and mixed breeds, where adult size is hardest to call. The most accurate guide is the breed standard and the size of the puppy's parents. Don't over- or under-feed to "hit a number" - feed for healthy, steady growth.
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