How Old is 2 in Dog Years?

Last Updated on September 20, 2023

2 in dog years roughly equals 24 in human years.

This calculation was made for a medium-sized dog (21 to 50 pounds) using the recommendations from the AKC (American Kennel Club).

There are 2 ways of calculating the conversion from human years to dog years. The above result was calculated using the more correct way, we’ll explain what makes the other way incorrect later in this article.

The table below shows dog years and their equivalent to human years, with different columns for different sizes.

Dog's Age in YearsHuman Years (Small Dog)Human Years (Medium Dog)Human Years (Large Dog)

2 in dog years

Calculating how many human years is 2 in dog years

As mentioned above, there are 2 main ways of calculating dog years to human years and vice versa. There’s a correct way and an incorrect way.

The incorrect calculation

Most people still assume that one dog year equals 7 dog years. This belief was probably first introduced in the 1950s. However, it’s not the right way to measure it.

Although there’s been plenty of research since then that disproves that the ratio is 7-1, it seems people are still holding on the idea. The formula could be based on an assumption that dogs live to about 10 years old and humans up reach 70 years old, but honestly, we’re not quite sure when it first started.

So while the 7-1 rule is easy to remember and calculate, it’s unfortunately incorrect.

The new way

The best method of converting human years to dog years is more difficult.

The American Veterinary Medical Association has the following things to be said about it:

  • The beginning year of a medium-sized dog’s life is about 15 years for humans.
  • The second year in a dog’s lifespan is roughly 9 years for humans.
  • From then on each human year is equal to the equivalent of four to five dog years.

Keep in mind that smaller dogs tend to live longer than bigger dogs. Scientists concluded that every 4.4 pounds of body mass reduced a dog’s life expectancy by about a month.


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