How Old is 6 in Dog Years?

6 in dog years roughly equals 42 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)

6 in dog years

Calculating how many human years is 6 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 formula

Many people believe that one dog year is equal to 7 dog years. This assumption probably started in the 1950s, however it’s not the correct way to calculate it.

There has been quite a bit of research that has disproved this ratio of 7 to 1, people continue to believe it. This formula may be based on the assumption that dogs live to 10-ish years and humans reach 70 years old, but honestly we don’t know when it started.

The 7 to 1 rule is simple to calculate and remember however, it’s sadly incorrect.

The correct calculation

The best method of converting human years to dog years is a bit more complicated.

The American Veterinary Medical Association has the following to add to it:

  • The very first year of a dog’s life is about 15 years for humans.
  • The second year of a dog’s existence equals about 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.


Becky Roberts

Becky Roberts

One of Becky's favourite things to do every morning is to browse the top pet-related forums, looking for issues and questions that people have. She then shortlists the most common ones, and turns them into blog posts for Fuzzy Rescue. She's had over 4 cats and 2 dogs over the past decade, so she does know a thing or 2 about raising/training, and more importantly, loving them. She's the only one on our team that doesn't like coffee, but it seems to us she really doesn't need more energy :). We're very fortunate to have her on board as she does most of the heavy listing for the site, outputting an insane amount of content each month. Read More

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