Newfoundland Dog Size Chart – Height, Weight & Growth Guide

A Newfoundland standing on its hind legs can look you in the eye. Some are taller than their owners. If you’re wondering how big this dog gets, the answer is very big.

How big do Newfoundland dogs get? Males reach 27–29 inches tall and 130-150 pounds. Females stand 25–27 inches and weigh 100-120 pounds. The Newfoundland dog breed, known as Newfies, is one of the largest in the world.

This Newfoundland dog size chart and growth chart covers height and weight for male and female dogs from puppy to full maturity. This chart gives dog owners the reference ranges for every stage of the Newfoundland’s growth. The weight chart is built into each table below.

Newfoundland Size Chart by Age

Male Newfoundlands weigh more and stand taller than females at every age. Growth is fastest during the first 6 months. A pup can gain 10 pounds per month during this phase.

A 6-month-old Newfoundland male is already 6-month-old and 65–90 lbs. That’s bigger than most adult dogs at just six months old. Every milestone in the first year is dramatic. A 10 pounds gain per month is normal.

Female Newfoundlands are smaller at every stage. Female Newfoundlands weigh 20–40 pounds less than males at full maturity. Your newfie pup will hit most of their height by 1 year but keep filling out.

When Do Newfoundlands Stop Growing?

Newfoundlands stop growing in height by 12–18 months. But they don’t reach their full adult weight until 2 years of age. Some large males keep adding bulk until 3 years old.

A fully grown adult Newfoundland male stands about 28 inches tall at the shoulder and weighs 150 pounds. According to the AKC and the Kennel Club, males should be 27–29 inches. Females stand about 26 inches and weigh around 120 pounds.

A full-grown dog’s skeletal system isn’t done until years of age 2–3. That’s why large and giant breed dogs need controlled exercise during the first two years. Don’t overfeed during growth — excess weight stresses developing joints.

For detailed weight tracking, the Newfoundland weight chart breaks down lbs and kg by age.

Factors That Affect Newfoundland Growth

Your Newfoundland growth chart results depend on several factors. Not every newf hits the same marks at the same age:

Genetics: The biggest factor. If the parents are large, the pup will be large. Ask the breeder about parent sizes. The largest pup in a litter isn’t always the biggest adult. Genetics play out over years.

Diet: Newfoundland puppies need giant breed dog food with controlled calcium. The Newfoundland food chart covers what to feed at each stage.

Exercise: Too much too early damages growing joints. A dog may look big enough for long runs at 6 months, but their bones aren’t ready. Keep it moderate.

Health: Your vet should monitor newfie’s growth at regular checkups. Stenosis (a heart condition) can affect energy and growth. Catch it early.

These canine giants were once powerful working dogs for fisherman communities and rescue dogs in the Atlantic.

That powerful working heritage shaped their massive frame. Understanding your newfie’s growth throughout their life helps you keep them at a healthy weight. The average weight varies by sex and genetics.

How Newfoundlands Compare to Other Giant Dogs

Among giant dog dog breeds, newfs aren’t the tallest or heaviest. But they’re among the broadest. 

Their barrel chest gives them a bear-like look. The biggest dog breeds chart ranks them all. The dog size chart covers every category. For a direct comparison, the Bernese vs Newfoundland page goes deeper.

What Size Gear Does a Newfoundland Need?

At full adult size, you’ll need XXL everything:

Crate: 54-inch XXL. The dog crate size chart has specs.

Bed: XL or XXL (120+ cm). The dog bed size chart covers dimensions.

Sweater: XXXL if needed. The dog sweater size chart lists sizes by breed.

Does Spaying or Neutering Affect Size?

Early neutering (before 12 months) can cause bones to grow longer than normal. This changes proportions and may increase joint stress.

Many veterinarians now recommend waiting until 18–24 months for giant breeds. This lets growth plates close naturally. Newfies that are neutered early may end up taller but with weaker joints.

Keeping Your Growing Newfoundland Healthy

Giant dogs have giant vet bills. Consider pet insurance while your puppy is young. It’s cheaper to insure a puppy than an adult.

Joint supplements with glucosamine help during growth. Start early. A healthy and happy newf needs proper nutrition, moderate exercise, and regular vet visits.

For coat care during growth, For color options, the Newfoundland colors guide shows all coat varieties. For how size affects lifespan, the Newfoundland lifespan page covers that link.

FAQs

How tall is a full-grown Newfoundland?

Males: 27–29 28 inches at the shoulder. Females: 25–27 inches. On hind legs, males reach 5–6 feet.

Are female Newfoundlands much smaller?

Yes. 20–40 pounds lighter and 2–3 inches shorter. Still a big dog by any standard among dog breeds.

How big is a Newfoundland at 4 months?

At 4 months, males weigh 40–60 lbs and stand 16–19 inches. They’re growing fast at this stage. Newfoundland puppies at four months old are already bigger than many adult small breeds.

When are Newfoundlands fully grown?

Height by 1 year. Full weight by 2–3 years. Newfs are slow to mature. A newfie pup at 12 months still has growing to do.

My Newfoundland puppy seems small for their age. Should I worry?

Not always. Some pups are late bloomers. If your newfie is active and eating well, they’re likely fine. If weight is flat for 2+ weeks, see your vet. For naming your growing puppy, the Newfoundland names guide has 150+ ideas.