It is commonly known that dogs age at a very different rate than humans. It was previously known that dogs age at a rate of seven years higher than humans, so every human year is equivalent to seven dog years. This theory was derived from the statistic that humans live on average to the age of 70, while dogs live on average to the age of ten, however this theory was further looked into and confirmed wrong.
In general we can say that dogs mature faster during the first few years of their lives in comparison to humans. They also mature sexually faster than we do, thus dogs can reproduce and give birth as early as one year of age while a seven year old human cannot.
Small breed dogs tend to live longer in comparison to other mammals, while larger breeds tend to live shorter life spans. This is explained by vets that as dogs age at a greater rate than their bodies. However dogs tend to age almost the same during the first 3 to 5 years.
There are other factors that also account for the dog’s age, however the table below can help you in determining how to calculate your dog’s age.