3 months in dog years roughly equals 2 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 3 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 calculation
Many people believe that 1 dog year equals 7 dog years; this assumption probably started in the 1950s. However, it’s not the right way to measure it.
While there has been quite a bit of research that has disproved that the ratio is 7-1, it seems that people still believe in the idea. The formula could be based on an belief that dogs live for about 10 years old and humans up reach 70 years old, but honestly it’s hard to tell when it first started.
The 7-1 rule is simple to remember and calculate however, it’s sadly incorrect.
The new way
The proper method to convert human years into dog years is more complicated.
The American Veterinary Medical Association has the following to be said about it:
- The first year of a dog’s life equals around 15 human years.
- The second year of a dog’s life equals about 9 human years.
- From that point onwards each year of a human equals 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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