8 in dog years roughly equals 51 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 Years||Human Years (Small Dog)||Human Years (Medium Dog)||Human Years (Large Dog)|
Calculating how many human years is 8 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 way
The majority of people still believe that one dog year equals 7 dog years. This belief was probably first introduced in the 1950s. However, this isn’t the best method of calculating it.
While there has been a lot of research since then that disproves this ratio of 7 to 1, people continue to believe the idea. This formula might be based on the idea that dogs live to 10-ish years and humans to 70, but honestly we don’t know when it started.
The 7-1 rule is simple to understand and keep in mind, it’s unfortunately incorrect.
The new calculation
The correct way of converting human years into dog years is more complicated.
The American Veterinary Medical Association has the following to say about it::
- The first year of a medium-sized dog’s lifespan equals around 15 human years.
- The second year of a dog’s life is equivalent to 9 human years.
- From that point forward, every human year equals four or 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.