Dog breed guide
Bullmastiff
The Bullmastiff has a short, dense, weather-resistant seasonal coat that Dogs Australia calls very low maintenance. Dogs Victoria describes a medium level of activity, firm consistent training, and supervision around children because of the breed's size. It is described as high spirited but good natured.
Bullmastiff at a glance
- Adult weight, male
- 50 to 60 kg
- Adult weight, female
- 45 to 54 kg
- Size
- Giant, over 40 kg
- Height
- 61 to 69 cm
- Lifespan
- 9 to 10 years
- Coat
- short and hard, weather resistant, lying flat to body
Ratings
Petboost editorial ratings from 1 to 5, drawn from the breed standard text under Sources. A breed with no basis in the sources for a rating shows none.
- Grooming effort
- Energy
- Trainability
- Good with children
5 means it needs the most grooming
5 means it needs a lot of exercise
5 means it learns quickly and eagerly
5 means it suits a family best
Next steps
- Find a local groomer or daycarePet businesses near you that take bookings online.
- Check a Bullmastiff puppy's weightWhere a puppy sits against the breed's adult range.
- Dog age in human yearsFrom a formula, not the seven-to-one rule.
Sources
- Petboost breed reference data, adult weight ranges (breed list snapshot).
- Dogs Australia, Bullmastiff, https://dogsaustralia.org.au/BrowseBreed/browse-a-breed/163/Bullmastiff/, read 2026-10-05
- Dogs Victoria, Bullmastiff breed information (life span and activity level, as shown in search result summary), https://dogsvictoria.org.au/family-pet/dogs-and-puppies/buying-a-puppy/breed-information-and-registered-breeders/bullmastiff/, read 2026-10-05
- The Royal Kennel Club (UK), Bullmastiff breed standard, https://www.royalkennelclub.com/breed-standards/working/bullmastiff/, read 2026-10-05
General information about the breed, not veterinary advice. Speak with your vet about your own pet.