How big will my Newfoundland get?
An adult Newfoundland weighs 130 to 150 pounds for males and 100 to 120 pounds for females (59 to 68 kg for males and 45.4 to 54.4 kg for females), according to the American Kennel Club. Put in your puppy’s age and weight to see where they’re heading.
Newfoundland puppy weight calculator
Newfoundland adult weight
| Pounds | Kilograms | |
|---|---|---|
| Male | 130 to 150 pounds | 59 to 68 kg |
| Female | 100 to 120 pounds | 45.4 to 54.4 kg |
Adult weight from the American Kennel Club’s Newfoundland breed page, checked 1 October 2026. Individual dogs vary, and a healthy weight for your dog is one for your vet to judge.
How the estimate works
The calculator takes your puppy’s weight, divides it by their age in weeks, and multiplies by 52. It’s a quick guide, not a growth chart: puppies gain fast early on and slow down as they near adult size, so the answer shifts as they grow. That’s why the result is shown next to the breed’s adult weight. If the two disagree, trust the breed’s weight and your vet.
More on the Newfoundland
- Ask other owners on the forum how their Newfoundland grew.
- Find a dog trainer near you, ranked by Bark Score with training methods labelled.
- Dog age calculator: your dog’s age in human years.