How old is a 9-month-old puppy in human years?
A 9-month-old puppy is about 10–13 in human years, depending on size: 13 for small, medium and large dogs and 10 for giant dogs.
At 9 months, a dog is
13 human years
Vet chart (by size)
Puppy
No breed or size picked, so we assumed a medium-sized dog.
Other methods: DNA formula (UCSD study): n/a · The ×7 rule: 5
The default is the size-based vet chart. See how pet age is calculated.
Puppy age by month
| Age | Small | Medium | Large | Giant |
|---|---|---|---|---|
| 1 month | 1 | 1 | 1 | 1 |
| 2 months | 2 | 2 | 2 | 2 |
| 3 months | 4 | 4 | 4 | 3 |
| 4 months | 6 | 6 | 6 | 5 |
| 5 months | 8 | 8 | 8 | 6 |
| 6 months | 10 | 10 | 10 | 8 |
| 7 months | 11 | 11 | 11 | 9 |
| 8 months | 12 | 12 | 12 | 10 |
| 9 months | 13 | 13 | 13 | 10 |
| 10 months | 14 | 14 | 14 | 11 |
| 11 months | 15 | 15 | 15 | 12 |
The default is the size-based vet chart. See how pet age is calculated.
FAQ
How old is a 9-month-old puppy in human years?
A 9-month-old puppy is about 10–13 in human years, depending on size: 13 for small, medium and large dogs and 10 for giant dogs.
Is a 9-month-old puppy an adult?
No. At 9 months, dogs of every size are still puppies. A small dog is about 13 in human years and a giant dog about 10.