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Rottweiler Mastiff Mix
A Rottweiler Mastiff mix is a cross between a Rottweiler and a Mastiff. Most grow into giant dogs of 100–180 lb and live 8–10 years.


Photos show the purebred parents. There is no single look for a mix: puppies in one litter can resemble either side.
How big does a Rottweiler Mastiff Mix get?
Pounds. The dark band is where most Rottweiler Mastiff Mix dogs end up; the light band is the full range between the smallest and largest parent.
Height runs 25–28 inches at the shoulder, against 22–27 in for the Rottweiler and 27.5–30 in for the Mastiff.
Coat, energy and training
Neither parent has a low-shedding coat, so expect dog hair around the house and seasonal heavy shedding.
Daily walks and some play are enough for most of these dogs.
The Rottweiler rates moderate and the Mastiff moderate; a puppy may lean either way.
A weekly brush and the odd bath keep the coat in shape.
Temperament
The Rottweiler is usually described as loyal, loving, confident guardian. 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.
Rottweiler vs Mastiff vs the mix
| Trait | Rottweiler | Rottweiler Mastiff Mix | Mastiff |
|---|---|---|---|
| Weight | 80–135 lb | 100–180 lb | 120–230 lb |
| Height | 22–27 in | 25–28 in | 27.5–30 in |
| Lifespan | 9–10 yr | 8–10 yr | 6–10 yr |
| Shedding | moderate | moderate | low |
| Energy | moderate | moderate | moderate |
| Group | Working | mixed | Working |
Questions about the Rottweiler Mastiff Mix
- How big does a Rottweiler Mastiff Mix get?
- Most grow to 100–180 pounds and 25–28 inches at the shoulder. Because puppies can take after either parent, the full possible range is 80–230 pounds.
- How long does a Rottweiler Mastiff Mix live?
- A typical lifespan is 8–10 years, the midpoint of the Rottweiler (9–10 years) and the Mastiff (6–10 years).
- Does a Rottweiler 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 Rottweiler Mastiff Mix easy to train?
- Trainability is moderate, based on how both parent breeds respond to training. Start early and keep sessions short.
Other Rottweiler mixes
- German Shepherd Rottweiler Mix
- Pit Bull Rottweiler Mix
- Rottweiler Doberman Mix
- Lab Rottweiler Mix
- Husky Rottweiler Mix
- Golden Retriever Rottweiler Mix
- Poodle Rottweiler Mix
- Chihuahua Rottweiler Mix
- Boxer Rottweiler Mix
- Corgi Rottweiler Mix
Other Mastiff mixes
- Great Dane Mastiff Mix
- Pit Bull Mastiff Mix
- Cane Corso Mastiff Mix
- Lab Mastiff Mix
- German Shepherd Mastiff Mix
- Boxer Mastiff Mix
- Mastiff Saint Bernard Mix
- Poodle Mastiff Mix
- Great Pyrenees Mastiff Mix
- Husky Mastiff Mix
Figures are calculated from each parent breed's standard height, weight and life expectancy. How we calculate.