How long does a Great Dane Mastiff Mix live?

A typical lifespan is 6–10 years, the midpoint of the Great Dane (7–10 years) and the Mastiff (6–10 years).

Is a Great Dane Mastiff Mix easy to train?

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

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Great Dane Mastiff Mix

A Great Dane Mastiff mix is a cross between a Great Dane and a Mastiff. Most grow into giant dogs of 115–200 lb and live 6–10 years.

Great Dane, a purebred dog — Great DanePhoto: Markovade.pero, CC BY-SA 3.0 rs, source

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

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

Weight115–200 lbcan be 110–230 lb

Height28–31 inat the shoulder

Lifespan6–10 years

SizeGiant

How big does a Great Dane Mastiff Mix get?

Great Dane110–175 lb

The mix115–200 lb

Mastiff120–230 lb

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

Height runs 28–31 inches at the shoulder, against 28–32 in for the Great Dane and 27.5–30 in for the Mastiff.

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

High

Plan on long daily walks plus real exercise, such as running, fetch or a sport. A yard alone will not tire this dog out.

Trainability

Moderate

The Great Dane rates moderate and the Mastiff moderate; a puppy may lean either way.

Grooming

Very low

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

Temperament

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

Great Dane vs Mastiff vs the mix

Trait	Great Dane	Great Dane Mastiff Mix	Mastiff
Weight	110–175 lb	115–200 lb	120–230 lb
Height	28–32 in	28–31 in	27.5–30 in
Lifespan	7–10 yr	6–10 yr	6–10 yr
Shedding	moderate	moderate	low
Energy	high	high	moderate
Group	Working	mixed	Working

Questions about the Great Dane Mastiff Mix

How big does a Great Dane Mastiff Mix get?: Most grow to 115–200 pounds and 28–31 inches at the shoulder. Because puppies can take after either parent, the full possible range is 110–230 pounds.
How long does a Great Dane Mastiff Mix live?: A typical lifespan is 6–10 years, the midpoint of the Great Dane (7–10 years) and the Mastiff (6–10 years).
Does a Great Dane Mastiff 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 Great Dane Mastiff Mix easy to train?: Trainability is moderate, based on how both parent breeds respond to training. Start early and keep sessions short.

Other Great Dane mixes

Other Mastiff mixes

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