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Newfoundland Growth Chart
Newfoundlands are gentle, powerful water dogs with a sweet temperament. Adults typically weigh 100–150 lb, with males heavier than females. Most reach adult weight around 24 months; slow, steady growth is essential.
View weight chart (lb & kg)Calculate Your Newfoundland Puppy's Adult Weight
Enter your Newfoundland puppy's age and current weight for an estimated adult weight range.
Newfoundland weight by age
Typical male and female puppy weight ranges by age, available in lb and kg. Individual puppies may vary.
Most Newfoundland puppies approach adult weight around 24 months, although individuals may finish earlier or later.
These estimated ranges combine the breed's adult weights with a size-based growth curve. They are not measured breed-specific percentiles or health targets. Month labels are rounded approximations; use the week values for each row. How these weight ranges are calculated
Newfoundland Growth Stages
Understanding the typical growth stages helps you know what to expect as your Newfoundland puppy grows.
Neonatal
0–2 weeksPuppies are born with eyes and ears closed, relying entirely on their mother. Rapid weight gain occurs during this period.
Socialization
3–12 weeksEyes and ears open. Puppies begin to explore, play, and learn social behaviors. This is a critical period for development.
Juvenile
3–8 monthsRapid growth continues. Puppies become more independent, start teething, and develop coordination.
Adolescent
8–18 monthsGrowth rate begins to slow. Puppies reach sexual maturity and may test boundaries. Muscle mass develops.
Young Adult
18–24 monthsGrowth is nearly complete. Your puppy is filling out and approaching adult proportions.
Adult
24+ monthsYour puppy has reached their full adult size. Weight should remain relatively stable with proper nutrition.
Newfoundland FAQ
How much will my Newfoundland puppy weigh as an adult?
Most adult Newfoundlands typically weigh between 100 and 150 lb. Males often reach 130–150 lb, while females usually finish at 100–120 lb.
At what age is a Newfoundland fully grown?
Newfoundlands are slow to mature and usually keep growing until about 24 months. Height finishes before weight, as heavy muscle fills in last.
How accurate is a Newfoundland puppy weight chart?
Charts show typical trends, not guarantees. Newfoundlands vary with lines and nutrition. Because growth is so prolonged, track the trend over months.
Do male and female Newfoundlands grow differently?
Males are substantially larger and heavier-boned, often 30 lb heavier than females. Females tend to mature slightly earlier.
How much should I feed my Newfoundland puppy?
Feed a giant-breed puppy formula in measured meals and keep growth slow and steady — fast growth damages joints in a dog this size. Ask your vet to monitor the growth curve closely.