A dog weight chart by size is more useful than it sounds, because how fast a puppy grows depends far more on how big it will end up than on which breed it is. Dogs heading for the same adult weight follow much the same curve. Pick the class your puppy is growing into, or use the calculator if you are not sure which one that is.
- Toy breedsUnder 11 lb (5 kg)2 charts
- Small breeds11-24 lb (5-11 kg)5 charts
- Medium breeds24-51 lb (11-23 kg)2 charts
- Large breeds51-90 lb (23-41 kg)4 charts
- Giant breedsOver 90 lb (41 kg)2 charts
When to use a breed chart instead
Use a size class chart when you do not know the breed — a mixed breed, a rescue of uncertain parentage, or a breed that does not have its own page here yet. The class chart has to cover every breed in that class at once, so its range is wide by design.
Use a breed weight chart when you do know. A breed page takes the same curve and scales it to that breed’s adult weight range from the American Kennel Club standard, then splits it by sex. That usually halves the range, which is the difference between a chart you can act on and one that only tells you the obvious.
The two are the same underlying data cut two ways, not competing answers. If a breed page and a class chart disagree, the breed page is the more specific of the two.
Why size class and not breed
The growth curves behind every chart here come from a study of around 15 million bodyweight records collected at US veterinary hospitals. Its central finding was that adult size, not breed, determines the shape of the growth curve: a 30 kg dog of any breed follows roughly the same trajectory. That is what makes one set of five curves able to serve every breed, and what makes an estimate possible for a puppy whose breed nobody knows.
Two honest caveats. The source records contain no breeds averaging between 14 and 23 kg, so the medium-class curve is interpolated from the classes either side and is the least certain of the five. And the original study could not model dogs above 40 kg, so the giant-class figures are percentiles calculated from the same raw records rather than results the study itself certified.
How to read any of these charts
Every row shows a range, not a target. A quarter of perfectly healthy puppies sit below the range for their age and a quarter above. What matters is the line your puppy holds across several weighings, not whether any single weigh-in lands inside the band. A puppy that has dropped from one part of the range to a lower one is worth a vet visit; a puppy that has always sat at the lighter end is usually just a lighter dog.