Here's how we calculate that:
* The first year of a dog's life is equivalent to about 15 human years. So, a 9-week-old puppy is roughly 15 * (9/52) = 2.6 years old in dog years.
* After the first year, each dog year is roughly equivalent to 4 human years. Since the puppy is less than a year old, we don't need to consider this part.
Important Note: These are just estimations. The exact age conversion varies depending on breed and individual dog.