How Old is 10 months in Dog Years?

10 months in dog years roughly equals 12 years 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)

Calculating how many human years is 10 months 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

The majority of people still believe that 1 dog year equals 7 dog years; this assumption was probably first introduced in the 1950s. However, this isn’t the best way to measure it.

While there has been plenty of research that has disproved the 7:1 ratio, that people still believe in it. This formula may be based on an assumption that dogs live to about 10 years old and humans up to 70, but honestly it’s hard to tell the date it was first introduced.

So while the 7 to 1 rule is simple to calculate and remember but it’s not the best idea.

The correct calculation

The correct way of converting human years into dog years is more difficult.

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

  • The first year of a medium-sized dog’s lifespan is about 15 years for humans.
  • The second year of a dog’s existence is roughly 9 years for humans.
  • From that point onwards, every human year equals either four or five dogs 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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