Last Updated on September 20, 2023
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 Years | Human Years (Small Dog) | Human Years (Medium Dog) | Human Years (Large Dog) |
|---|---|---|---|
| 1 | 15 | 15 | 15 |
| 2 | 24 | 24 | 24 |
| 3 | 28 | 28 | 28 |
| 4 | 32 | 32 | 32 |
| 5 | 36 | 36 | 36 |
| 6 | 40 | 42 | 45 |
| 7 | 44 | 47 | 50 |
| 8 | 48 | 51 | 55 |
| 9 | 52 | 56 | 61 |
| 10 | 56 | 60 | 66 |
| 11 | 60 | 65 | 72 |
| 12 | 64 | 69 | 77 |
| 13 | 68 | 74 | 82 |
| 14 | 72 | 78 | 88 |
| 15 | 76 | 83 | 93 |
| 16 | 80 | 87 | 99 |
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 calculation
The majority of people still believe that one dog year equals seven dog years. This assumption likely began in the 1950s. However, it’s not the right way to measure it.
Although there’s been plenty of research since then disproving that the ratio is 7-1, it seems that people still believe in it. The formula could have been based on the belief that dogs live for 10-ish years and humans can live to 70, however we don’t know when it first started.
So while the 7-1 rule is easy to understand and keep in mind but it’s not the best idea.
The correct calculation
The correct way of converting human years into dog years is a bit more complex.
The American Veterinary Medical Association has the following to say about it::
- The beginning year of a medium-sized dog’s life is about 15 years for humans.
- The second year of a dog’s existence is equivalent to 9 human years.
- 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.
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