How old is a 13-year-old dog in human years?
A 13-year-old dog is about 68–100 in human years, depending on size: 68 for small dogs, 74 for medium dogs, 82 for large dogs and 100 for giant dogs. Few large and giant dogs live this long.
At 13 years, a dog is
74 human years
Vet chart (by size)
No breed or size picked, so we assumed a medium-sized dog.
Other methods: DNA formula (UCSD study): 72 · The ×7 rule: 91
The default is the size-based vet chart. See how pet age is calculated.
Dog ages around 13
| Dog age | Small | Medium | Large | Giant |
|---|---|---|---|---|
| 10 years | 56 | 60 | 66 | 79 |
| 11 years | 60 | 65 | 72 | 86 |
| 12 years | 64 | 69 | 77 | 93 |
| 13 years | 68 | 74 | 82 | 100 |
| 14 years | 72 | 78 | 88 | 107 |
| 15 years | 76 | 83 | 93 | 114 |
| 16 years | 80 | 87 | 99 | 121 |
The default is the size-based vet chart. See how pet age is calculated.
13-year-old dog by breed
FAQ
How old is a 13-year-old dog in human years?
A 13-year-old dog is about 68–100 in human years, depending on size: 68 for small dogs, 74 for medium dogs, 82 for large dogs and 100 for giant dogs. Few large and giant dogs live this long.
Is a 13-year-old dog old?
It depends on size. At 13, dogs of every size are seniors. Vets consider a dog a senior in the last quarter of its expected lifespan.
How old is a 13-year-old dog with the ×7 rule?
91, compared with 74 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.