How old is a 17-year-old dog in human years?
A 17-year-old dog is about 84–128 in human years, depending on size: 84 for small dogs, 91 for medium dogs, 105 for large dogs and 128 for giant dogs. Few dogs of any size live this long.
At 17 years, a dog is
91 human years
Vet chart (by size)
No breed or size picked, so we assumed a medium-sized dog.
This is older than the typical lifespan, so treat the number as a rough estimate.
Other methods: DNA formula (UCSD study): 76 · The ×7 rule: 119
The default is the size-based vet chart. See how pet age is calculated.
Dog ages around 17
| Dog age | Small | Medium | Large | Giant |
|---|---|---|---|---|
| 14 years | 72 | 78 | 88 | 107 |
| 15 years | 76 | 83 | 93 | 114 |
| 16 years | 80 | 87 | 99 | 121 |
| 17 years | 84 | 91 | 105 | 128 |
| 18 years | 88 | 95 | 111 | 135 |
| 19 years | 92 | 99 | 117 | 142 |
| 20 years | 96 | 103 | 123 | 149 |
The default is the size-based vet chart. See how pet age is calculated.
17-year-old dog by breed
FAQ
How old is a 17-year-old dog in human years?
A 17-year-old dog is about 84–128 in human years, depending on size: 84 for small dogs, 91 for medium dogs, 105 for large dogs and 128 for giant dogs. Few dogs of any size live this long.
Is a 17-year-old dog old?
It depends on size. At 17, dogs of every size are seniors. Vets consider a dog a senior in the last quarter of its expected lifespan.
How old is a 17-year-old dog with the ×7 rule?
119, compared with 91 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.