How old is your dog in human years? We used to simply multiply a dog’s age by seven. However, this calculation isn’t so cut-and-dried.
Since the 1950s, the popular calculation of how old a dog was “in human years” has been that 1 dog year is the equivalent of 7 human ones. Even though this formula has been around for a surprisingly long time, the reality is not so cut-and-dried. That doesn’t stop many people from defaulting to this traditional calculation.
One explanation for how this formula got started is that the 7:1 ratio seems to have been based on the statistic that people lived to about 70, and dogs to about 10.
According to the American Veterinary Medical Association:
·The first year of a medium-sized dog’s life is equal to approximately 15 years of a human’s life.
·The second year of a dog’s life equals about nine years for a human.
·And after that, every human year equals approximately four or five years for a dog.
In other words, the number of human years piles onto a dog’s life more quickly during the dog’s rapid growth to maturity.
Dog Age Calculator: DOG YEARS TO HUMAN YEARS
Consult the chart below to see the differences between different size dogs (small, medium, large, giant). It should give you a good sense of where your dog is in the development/aging process.