How long does a Mastiff Newfoundland Mix live?

A typical lifespan is 8–10 years, the midpoint of the Mastiff (6–10 years) and the Newfoundland (9–10 years).

Is a Mastiff Newfoundland Mix easy to train?

Trainability is high, based on how both parent breeds respond to training. Start early and keep sessions short.

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Mastiff Newfoundland Mix

A Mastiff Newfoundland mix is a cross between a Mastiff and a Newfoundland. Most grow into giant dogs of 110–190 lb and live 8–10 years.

Mastiff, a purebred dog — MastiffPhoto: Pleple2000, CC BY-SA 3.0, source

Newfoundland, a purebred dog — NewfoundlandPhoto: Hartmann Linge, CC BY-SA 4.0, source

Photos show the purebred parents. There is no single look for a mix: puppies in one litter can resemble either side.

Weight110–190 lbcan be 100–230 lb

Height27–29 inat the shoulder

Lifespan8–10 years

SizeGiant

How big does a Mastiff Newfoundland Mix get?

Mastiff120–230 lb

The mix110–190 lb

Newfoundland100–150 lb

Pounds. The dark band is where most Mastiff Newfoundland Mix dogs end up; the light band is the full range between the smallest and largest parent.

Height runs 27–29 inches at the shoulder, against 27.5–30 in for the Mastiff and 26–28 in for the Newfoundland.

Coat, energy and training

Shedding

Moderate

Neither parent has a low-shedding coat, so expect dog hair around the house and seasonal heavy shedding.

Energy

Moderate

Daily walks and some play are enough for most of these dogs.

Trainability

High

The Mastiff rates moderate and the Newfoundland high; a puppy may lean either way.

Grooming

Low

A weekly brush and the odd bath keep the coat in shape.

Temperament

The Mastiff is usually described as courageous, dignified, good-natured. The Newfoundland as sweet, patient, devoted. A mix can take after either parent or land in between. If you can, meet both parents of a puppy before you choose.

Mastiff vs Newfoundland vs the mix

Trait	Mastiff	Mastiff Newfoundland Mix	Newfoundland
Weight	120–230 lb	110–190 lb	100–150 lb
Height	27.5–30 in	27–29 in	26–28 in
Lifespan	6–10 yr	8–10 yr	9–10 yr
Shedding	low	moderate	moderate
Energy	moderate	moderate	moderate
Group	Working	mixed	Working

Questions about the Mastiff Newfoundland Mix

How big does a Mastiff Newfoundland Mix get?: Most grow to 110–190 pounds and 27–29 inches at the shoulder. Because puppies can take after either parent, the full possible range is 100–230 pounds.
How long does a Mastiff Newfoundland Mix live?: A typical lifespan is 8–10 years, the midpoint of the Mastiff (6–10 years) and the Newfoundland (9–10 years).
Does a Mastiff Newfoundland Mix shed?: Shedding is moderate. Neither parent has a low-shedding coat, so expect dog hair around the house and seasonal heavy shedding.
Is a Mastiff Newfoundland Mix easy to train?: Trainability is high, based on how both parent breeds respond to training. Start early and keep sessions short.

Other Mastiff mixes

Other Newfoundland mixes

Figures are calculated from each parent breed's standard height, weight and life expectancy. How we calculate.