Newfoundland weight chart by age
In a published growth study, adult Newfoundland dogs averaged about 95 lb (43.3 kg). Puppies reached 99 percent of that weight at around 46 weeks, which is about 11 months. Use the chart to see what is typical at each age, or enter your puppy's weight for an estimate of the adult size.
Your puppy is at about 40% of its adult weight.
Newfoundland puppy weight by age
| Age | Pounds | Kilograms | Of adult weight |
|---|---|---|---|
| 8 weeks | 14.1 | 6.4 | 15% |
| 12 weeks | 24.1 | 10.9 | 25% |
| 16 weeks | 37.9 | 17.2 | 40% |
| 20 weeks | 53.7 | 24.3 | 56% |
| 24 weeks | 68.2 | 30.9 | 71% |
| 32 weeks | 86.4 | 39.2 | 91% |
| 40 weeks | 92.9 | 42.1 | 97% |
| 1 year | 95.1 | 43.1 | 100% |
| 15 months | 95.4 | 43.3 | 100% |
| 18 months | 95.5 | 43.3 | 100% |
| Adult average | 95.5 | 43.3 | 100% |
Values are calculated from the growth curve fitted to the Newfoundland puppies in the study. Males and females were not reported separately here, and individual dogs vary, so treat the numbers as a typical pattern, not a standard.
Newfoundland growth chart
The dot marks one year. After that, weight changes slowly.
How fast does a Newfoundland grow?
This breed is in the giant group in our puppy size calculator. Growth was half done at about 19 weeks, which is when the curve is steepest. A Newfoundland is usually close to its adult weight by 11 months, although the body can keep filling out afterward. For how much to feed along the way, see the puppy feeding chart.
Questions
How much should a Newfoundland puppy weigh at 8 weeks?
In the study a Newfoundland weighed about 14.1 lb (6.4 kg) at 8 weeks.
How much should a Newfoundland puppy weigh at 16 weeks?
About 37.9 lb (17.2 kg), which is roughly 40 percent of the adult weight.
How much does an adult Newfoundland weigh?
The adult dogs in the study averaged about 95 lb (43.3 kg). Breed standards and individual dogs differ.
When is a Newfoundland fully grown?
Around 46 weeks (11 months) for weight, according to the growth curve.
Is my Newfoundland overweight?
Weight alone cannot say. Use the body condition check to look at ribs and waist.
Other breeds
Papillon, Cocker Spaniel, Miniature Schnauzer, Cairn Terrier, Beagle, English Springer Spaniel, Labrador Retriever, English Mastiff, St. Bernard, Irish Wolfhound, Great Dane. See also the dog weight chart for all breeds side by side.
Sources
- Hawthorne A.J. et al., "Body-weight changes during growth in puppies of different breeds", Journal of Nutrition, 2004.
Last reviewed 2026-10-26. This page is general information and not veterinary advice.