Last Updated on September 20, 2023
8 months in dog years roughly equals 8 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 8 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 old formula
Most people still assume that one dog year equals seven dog years; this assumption likely began in the 1950s, however this isn’t the best way to measure it.
Although there’s been plenty of research that has disproved the 7:1 ratio, people continue to believe it. The formula could have been based on the belief that dogs live for about 10 years old and humans up can live to 70, however, we’re not quite sure the date it was first introduced.
So while the 7-1 rule is simple to calculate and remember but it’s not the best idea.
The correct formula
The best method of converting human years into dog years is more complicated.
The American Veterinary Medical Association has the following to add to it:
- The very 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 forward 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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