Updated · Published by Radif Partners
Newfoundland Weight & Growth Chart
Complete weight guide with growth charts for male and female Newfoundlands from puppy to adult.
The Newfoundland belongs to the Working group and originates from Canada. Adults typically weigh between 100 and 150 pounds, standing 26 to 28 inches at the shoulder. Life expectancy runs from 9 to 10 years, and the figures on this page describe that range rather than a single average, because the spread is what matters when you are deciding. Running costs settle around $279 a month once the dog is past puppyhood, before insurance and before anything unexpected. These numbers come from published breed standards and, where a standard is silent, from longevity and veterinary studies; they describe the breed as a population and not the dog in front of you. Line, upbringing, early socialisation and simple chance move an individual well away from the typical profile, and two dogs of the same breed often differ more than two dogs of different breeds. Nothing here is a diagnosis: for a specific animal, a veterinary surgeon who has examined it will always know more than a table.
Newfoundland Weight Overview
Adult Newfoundlands typically weigh between 100 and 150 pounds, with males generally being larger than females. Males average 100–150 lbs while females typically weigh 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..
Newfoundland 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.
Newfoundland Male vs Female Size Differences
Male and female Newfoundlands differ noticeably in size, a pattern common in giant breeds. Males typically weigh 100–150 lbs, while females weigh 85–132 lbs. Both sexes stand 26–28 inches tall at the shoulder, though males tend to fall at the upper end of this range.
These size differences can influence practical ownership decisions. Larger males require more food, larger crate sizes, and stronger leash handling. Female Newfoundlands at the lower weight range may be easier to manage physically for smaller handlers or families with children. Both sexes share the same temperament and health profile, so size preference should be a practical decision rather than a temperament-based one.
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..
Newfoundland Weight Management Tips
Maintaining your Newfoundland at a healthy weight between 100 and 150 lbs is one of the most impactful things you can do for their long-term health. Studies consistently show that lean dogs live an average of 1.8–2.5 years longer than overweight dogs of the same breed.
Portion control: Use a measuring cup for every meal rather than estimating. Feed the amount recommended for your Newfoundland's ideal weight, not their current weight if they are overweight. Divide daily food into two meals for adults and three meals for puppies under six months.
Treat management: Treats should not exceed 10% of daily caloric intake. Use small, low-calorie training treats and consider using pieces of your dog's regular kibble as rewards during training sessions. Avoid table scraps entirely, as they add unpredictable calories and can introduce foods that are toxic to dogs.
Exercise alignment: With an exercise needs rating of 3/5, the Newfoundland requires moderate daily exercise. Balance food intake with activity level, adjusting portions during periods of reduced activity such as recovery from illness or injury.
Regular weigh-ins: Weigh your Newfoundland monthly and track the trend. Gradual weight gain of even one to two pounds per month can lead to significant obesity over time. Your veterinarian can establish your dog's ideal weight during wellness visits and recommend caloric adjustments as needed.
Feeding Recommendation
An adult Newfoundland's daily food intake is typically 1.5–3.0 cups of high-quality kibble, fed in two meals. 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.. At 100–150 lbs with energy level 2/5, a joint-supporting formula is recommended for this giant-sized working breed.
Newfoundland Weight by Age Table
The following table shows expected weight ranges for male and female Newfoundlands at key developmental milestones. Individual dogs may fall slightly outside these ranges depending on genetics, nutrition, and activity level. Consult your veterinarian if your Newfoundland's weight deviates significantly from these benchmarks.
| 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 |
Health Risks of Incorrect Weight in Newfoundlands
Both underweight and overweight conditions pose serious health risks for the Newfoundland. Understanding these risks reinforces the importance of maintaining your dog within the 100–150 lb target range.
Overweight risks: Excess weight places additional strain on joints, increasing the risk and severity of conditions like Subaortic Stenosis. Overweight Newfoundlands also face higher rates of diabetes, heart disease, respiratory compromise, heat intolerance, and reduced lifespan. Even moderate excess weight, just 10–15% above ideal, shortens life expectancy and reduces quality of life.
Underweight risks: A Newfoundland consistently below 100 lbs may be experiencing inadequate nutrition, parasitic infection, dental problems that prevent eating, or underlying illness. Underweight dogs have weakened immune systems, poor coat quality, reduced energy, and slower healing. If your Newfoundland appears thin despite normal feeding, veterinary examination is essential to rule out medical causes.
Frequently Asked Questions
Related Breeds You May Also Like
If you are interested in the Newfoundland, you may also want to explore these breeds with similar size, temperament, or group classification.