How old is an 8-year-old dog in human years?
An 8-year-old dog is about 48–64 in human years, depending on size: 48 for small dogs, 51 for medium dogs, 55 for large dogs and 64 for giant dogs.
At 8 years, a dog is
51 human years
Vet chart (by size)
No breed or size picked, so we assumed a medium-sized dog.
Other methods: DNA formula (UCSD study): 64 · The ×7 rule: 56
The default is the size-based vet chart. See how pet age is calculated.
Dog ages around 8
| Dog age | Small | Medium | Large | Giant |
|---|---|---|---|---|
| 5 years | 36 | 36 | 36 | 45 |
| 6 years | 40 | 42 | 45 | 49 |
| 7 years | 44 | 47 | 50 | 56 |
| 8 years | 48 | 51 | 55 | 64 |
| 9 years | 52 | 56 | 61 | 71 |
| 10 years | 56 | 60 | 66 | 79 |
| 11 years | 60 | 65 | 72 | 86 |
The default is the size-based vet chart. See how pet age is calculated.
8-year-old dog by breed
FAQ
How old is an 8-year-old dog in human years?
An 8-year-old dog is about 48–64 in human years, depending on size: 48 for small dogs, 51 for medium dogs, 55 for large dogs and 64 for giant dogs.
Is an 8-year-old dog old?
It depends on size. At 8, small and medium dogs are mature adults; large and giant dogs are seniors. Vets consider a dog a senior in the last quarter of its expected lifespan.
How old is an 8-year-old dog with the ×7 rule?
56, compared with 51 on the vet chart for a medium dog. The ×7 rule is a myth: pets age fast in their first two years and more slowly after that.