Dog Days
The old formula that one year of a dog’s life is equal to seven years of a human’s life is no longer considered an accurate calculation. To determine your dog’s age in human years now requires looking at a number of contributing factors: size of dog, breed type, gender, diet and exercise, to name only a few.
The size of a dog and its breed type may be the strongest contributors to a dog’s life expectancy, and how its age converts to human years. A general rule is that small dogs have a much longer life expectancy than large dogs, so that small dogs, in most instances, mature at a slower rate than large dogs. This means a different calculation must be used to determine their human age. The breed of a dog is also a very strong indicator of the average life span, and sometimes turns the above rule on its head. For instance, the Doberman Pinscher, a large dog, easily averages a life span of 15 years and beyond, an age most commonly contributed to small dogs.
Unlike the size and breed of a dog, there are some things a responsible owner can control to keep their dog young (in human and dog years). A healthy, balanced diet, and an appropriate amount of consistent exercise can work wonders to extend your dog’s life expectancy, and ensures the quality of those years.
To calculate your dog’s age at a very basic level use this calculator:
To more accurately calculate your dog’s age in human years, taking into account all the contributing factors, visit www.DogAge.com to use the DogAge Test.

