A 3-year-old human is the same as a

-year-old dog.

Unfortunately, it is not possible to determine the exact equivalence of a 3-year-old human to a -year-old dog without specific information about the size and breed of the dog. This is because dogs age at a different rate than humans. However, as a general guideline, it is often said that one dog year is roughly equivalent to 7 human years. But this is a rough estimate and may vary depending on the individual dog.

A 3-year-old human is roughly equivalent to a 28-year-old dog in terms of developmental milestones. However, it's important to note that dogs and humans age differently, and the equivalency varies depending on the breed and size of the dog. Dogs have a shorter average lifespan compared to humans, so their rate of development is faster.

To determine the equivalent age of a dog in comparison to a 3-year-old human, we need to consider the concept of "dog years." Many people believe that 1 human year is equal to 7 dog years. However, this calculation is an approximation and may not be accurate for all breeds.

To get a more accurate estimate, we can refer to a general guideline that suggests the following:

- The first year of a dog's life is roughly equivalent to 15 human years.
- The second year of a dog's life is around 9 human years.
- After that, each additional year could be considered roughly equivalent to 5 human years.

Applying this guideline, we can calculate the equivalent age of a 3-year-old human in dog years:

- First year (15 dog years)
- Second year (9 dog years)
- Third year (5 dog years)

Adding these together, a 3-year-old human would be approximately 29 dog years old. However, keep in mind that this estimate may still vary depending on the size, breed, and individual characteristics of the dog.