Bernese Mountain Dog Age Calculator
How old is your Bernese Mountain Dog
in human years?
Bernese Mountain Dogs are usually quoted at 7 to 10 years. A 2024 study of 584,734 UK dogs measured a 10.1-year median, and this calculator uses that figure. Studies counting only dogs that had died put the typical age at death nearer 8.
By Claire Whitman · Updated · Sources
By Breed set to Bernese Mountain Dog. Different breed? Use the main dog age calculator.
Bernese Mountain Dog age chart: Bernese years to human years
Find your Bernese's age on the left and read across. The right column is our standard estimate for a dog over 90 lbs. It turns senior at 7.5, almost the same as the age used here: an 8-year-old Bernese is about 67 in human years, against 67 for a typical giant dog.
| Dog age | Bernese Mountain Dog | Typical giant dog 90+ lbs |
|---|---|---|
| 1 year | 31 | 31 |
| 2 years | 42 | 42 |
| 3 years | 46 | 46 |
| 4 years | 50 | 50 |
| 5 years | 54 | 55 |
| 6 years | 59 | 59 |
| 7 years | 63 | 63 |
| 8 years | 67 | 67 |
| 9 years | 71 | 71 |
| 10 years | 75 | 75 |
| 11 years | 79 | 80 |
| 12 years | 83 | 84 |
| 13 years | 87 | 88 |
| 14 years | 91 | 92 |
| 15 years | 96 | 96 |
| 16 years | 100 | 100 |
Shaded cells: senior life stage (the last quarter of expected lifespan, AAHA 2019).
When is a Bernese Mountain Dog considered a senior?
At about 7.6, based on the 2019 AAHA guideline that the senior stage is the last 25% of a dog's estimated lifespan, and a 10.1-year median. Studies that looked only at Bernese that had died found a typical age at death closer to 8, so it's reasonable to start talking about senior care with your vet from about 6 or 7.
How long do Bernese Mountain Dogs live?
- 10.1 years (median): McMillan et al. (2024) included 1,116 UK Bernese, 449 of which had died when the data was collected. The median for all dogs was 12.5.
- 7.7 years (median age at death): a 2026 UK study of giant breeds in everyday vet clinics, based on 63 Bernese that died.
- 8.4 years (median survival): a Swiss study that followed 389 club-registered Bernese born in 2001 and 2002 until almost all had died.
- 7 to 10 years (breed range): the range the American Kennel Club lists. It isn't a measured average.
The 10.1 figure is higher partly because it's a different kind of estimate: it accounts statistically for the many dogs still alive. We explain the gap, and what the studies found about cancer, in Bernese Mountain Dog lifespan: why cancer sets the pace.
Cancer in Bernese Mountain Dogs
In the Swiss study, cancer was recorded as the cause of death in 58.3% of the dogs, though many of those diagnoses weren't confirmed by a lab. One type, histiocytic sarcoma, is far more common in this breed than in most dogs. You can't screen for it at home, but tiredness, eating less, weight loss and pale gums were common signs in a study of 365 affected Bernese. Mention changes like these to your vet promptly.
How we calculate Bernese Mountain Dog age
- First two years: the formula from Wang et al. (2020, Cell Systems), human_age = 16 × ln(dog_age) + 31, the same for every dog. A 1-year-old is about 31 in human years and a 2-year-old about 42.
- After age 2: a steady pace set so a Bernese reaches 65 human years when it turns senior at about 7.6. That's about 4.1 human years per year, against 4.2 for a typical giant dog. It puts a Bernese at the 10.1-year median at about 75, the same point every size reaches at its typical lifespan in our main calculator.
Frequently asked questions
How old is a 5-year-old Bernese Mountain Dog in human years?
About 54. A typical giant dog would be about 55. The chart above shows every age from 1 to 16.
How old is an 8-year-old Bernese Mountain Dog in human years?
About 67. Eight is just past the age of about 7.6 when a Bernese enters the senior stage on this estimate.
When is a Bernese Mountain Dog considered a senior?
From about 7.6 using a 10.1-year median and AAHA's last-25% rule. Studies of Bernese that had died found a typical age at death near 8, so ask your vet about senior checkups from about 6 or 7.
How long do Bernese Mountain Dogs live?
A 2024 study of UK dogs found a median of 10.1 years across 1,116 Bernese. Studies of dogs that had died found a median age at death of 7.7 years in UK vet clinics and 8.4 years in Switzerland. The American Kennel Club lists 7 to 10 years.
Why do Bernese Mountain Dogs have short lives?
Size is part of it, since bigger breeds generally live shorter lives. Cancer is the other big factor: it was recorded as the cause of death in 58.3% of Bernese in a Swiss study.
Sources
- McMillan KM, Bielby J, Williams CL, Upjohn MM, Casey RA, Christley RM (2024). Longevity of companion dog breeds: those at risk from early death. Scientific Reports 14: 531. doi:10.1038/s41598-023-50458-w
- O'Neill DG, Curtis TJ, York GOJ, Brodbelt DC, Church DB, Engdahl KS (2026). Giant dog breeds under primary veterinary care in the UK: demography, common disorders and mortality. Companion Animal Health and Genetics 13: 4. doi:10.1186/s40575-026-00152-7
- Klopfenstein M, Howard J, Rossetti M, Geissbühler U (2016). Life expectancy and causes of death in Bernese mountain dogs in Switzerland. BMC Veterinary Research 12: 153. doi:10.1186/s12917-016-0782-9
- Erich SA, Dobson JM, Teske E (2022). Comparison of the clinical characteristics of histiocytic sarcoma in Bernese Mountain Dogs and Flat-Coated Retrievers. Veterinary Sciences 9(9): 498. doi:10.3390/vetsci9090498
- Wang T, et al. (2020). Quantitative translation of dog-to-human aging by conserved remodeling of the DNA methylome. Cell Systems 11(2): 176–185. doi:10.1016/j.cels.2020.06.006
- Creevy KE, et al. (2019). 2019 AAHA Canine Life Stage Guidelines. Journal of the American Animal Hospital Association 55(6): 267–290. doi:10.5326/JAAHA-MS-6999
- American Kennel Club. Bernese Mountain Dog breed profile.