How many dog years to human?

Dog years to human years is not a fixed calculation, as it varies depending on the size and breed of the dog. However, there is a general rule that is often used:

- For the first two years, a dog ages at a rate of about 15 human years per year.

- After the first two years, a dog ages at a rate of about 4 or 5 human years per year.

Using this general rule, you can estimate how old your dog is in human years. For example, if you have a 5-year-old Labrador Retriever, they would be about 35 human years old (2 + 3 x 5).