Newfoundland Weight & Growth Chart

Complete weight guide with growth charts for male and female Newfoundlands from puppy to adult.

Male Adult Weight

100–150 lbs

Female Adult Weight

85–132 lbs

Newfoundland Weight Overview

Weight range for the Newfoundland: 100–150 lbs overall. Males: 100–150 lbs. Females: 85–132 lbs.

Males weigh 130-150 pounds, females 100-120 pounds; some males exceed 175 pounds, and the breed should appear powerful but never clumsy or fat.. Consult the growth chart below for typical weight progression by age.

Growth Chart

When Does a Newfoundland Stop Growing?

As a giant-sized working breed from Canada, the Newfoundland reaches full height of 26–28 inches by approximately 15–24 months. Full adult weight of 100–150 lbs follows within a few months as the dog fills out.

Nutrition during the growth phase is critical. Given the breed's predisposition to Subaortic Stenosis, proper growth-rate management is especially important.

Is My Newfoundland Overweight?

Is your Newfoundland at a healthy weight? The ideal range is 100–150 lbs (males 100–150, females 85–132). Check these three signs:

Ribs: Easily felt with light pressure; not visible but not buried under fat
Waistline: A clear narrowing behind the ribs when viewed from above
Abdominal tuck: The belly slopes upward from the ribcage to the hind legs when viewed from the side

If your dog fails any of these checks, consult your vet. Heart disease, particularly subaortic stenosis, is the breed's most critical concern; cardiac screening of breeding stock is absolutely essential..

Feeding Recommendation

Feed an adult Newfoundland approximately 1.5–3.0 cups of quality kibble daily, split into two meals. Males (100–150 lbs) may need slightly more than females (85–132 lbs). Males weigh 130-150 pounds, females 100-120 pounds; some males exceed 175 pounds, and the breed should appear powerful but never clumsy or fat.. With moderate energy (2/5), portions at the middle of guidelines usually suffice.

Weight by Age Table

Age	Male (lbs)	Female (lbs)
3 months	27.1–32.9	23.0–28.0
6 months	61.1–73.9	51.8–62.9
9 months	88.2–106.8	74.8–90.9
12 months	108.6–131.4	92.1–111.9
18 months	129.0–156.0	109.4–132.9
24 months	135.8–164.2	115.1–139.9

Frequently Asked Questions

Males: 100–150 lbs. Females: 85–132 lbs. Males weigh 130-150 pounds, females 100-120 pounds; some males exceed 175 pounds, and the breed should appear powerful but never clumsy or fat.. Consult your vet for a personalized assessment.

Height plateaus around 15–24 months for the Newfoundland, with males reaching 150 lbs and females 132 lbs at maturity. As a working breed from Canada, they continue filling out for several months after reaching full height.

For a Newfoundland at healthy weight (100–150 lbs), you should feel ribs without pressing hard, see a defined waist from above, and notice an abdominal tuck from the side. As a giant-sized working breed, maintaining lean body condition is critical for joint health and can extend lifespan by 1–2 years.

Start with the food label's guidelines for your puppy's current weight and adjust based on body condition. Newfoundland puppies should eat 3–4 meals daily until 6 months, then transition to twice daily. Given the breed's predisposition to Subaortic Stenosis, your vet may recommend specific dietary considerations. Target adult weight is 100–150 lbs (100–150 for males, 85–132 for females).

If your Newfoundland puppy isn't gaining weight as expected (target adult weight: 100–150 lbs), consult your vet. Common causes include intestinal parasites, insufficient calorie intake, or malabsorption. The breed's predisposition to Subaortic Stenosis could also be a factor worth investigating. A fecal test and blood work are typically the first diagnostic steps.