According to the American Veterinary Medical Association: A medium-sized dog’s first year of life is approximately 15 years of human life. The second year of life for a dog corresponds to about nine years for a human. And after that, every human year is about four or five years for a dog.
However, as a general guideline, the American Veterinary Medical Association breaks it down as follows: 15 human years equals the first year of life for a medium-sized dog. The second year for a dog is about nine years for a human. And after that, every human year would be about five years for a dog.
How old is your tail-wagging bundle of joy in human years? According to the well-known “paw rule”, a dog year equals 7 years. Now scientists say it’s wrong.
A general rule of thumb for dog owners is that one year for dogs is equal to seven human years. But new research shows that young puppies age much faster than young humans, so the simple ratio of one to seven years is wrong. A 1-year-old dog is more “like a 30-year-old human,” said one scientist.
A dog’s first year is equal to 15 human years. The second year of life of a dog corresponds to about nine human years. Each additional year is about four or five human years.
So a 7-year-old dog would be about 62.1 human-years old.
The rule of seven dog years for every human year is simply obtained by rough dividing human life expectancy, approximately 80 years, by dog life expectancy, typically 12 years. Trey Ideker of the University of California, San Diego, and his colleagues found that the rule is a little off.
Many have pondered this question. The answer is just one!
A dog’s second year is equal to nine human years (which makes a 2-year-old, medium-sized dog roughly 24 in human years). From the age of three, each dog year corresponds to about five human years.
The More Accurate Calculation of Dog Years
Contrary to popular belief, dogs do not age at a rate of 7 human years for every year in dog years. According to the American Veterinary Medical Association: A medium-sized dog’s first year of life is approximately 15 years of human life.
But why do our beloved pets live so much shorter lives than our own, regardless of their size? Well, dogs have faster metabolisms and hearts that work harder than our own. Because of all this extra work, dogs age faster and consequently live shorter lives. It also means they grow up faster.
With this formula, a 10-year-old dog is equivalent to a 53-year-old human. Using the simple 7:1 ratio, the same 10-year-old dog would be equivalent to a 70-year-old human. All of these calculations are based on the assumption that the average life expectancy of people in developed countries is 80 years.
Depending on its size, a 16-year-old dog corresponds roughly to an 80- to 123-year-old human. Like older people, your dog will move more slowly and sleep more than in his livelier years. He may also be showing signs of cognitive decline.
The greatest reliable age on record for a dog is 29 years 5 months for an Australian cattle dog named Bluey owned by Les Hall of Rochester, Victoria, Australia. Acquired as a pup in 1910, Bluey worked among cattle and sheep for nearly 20 years before being euthanized on November 14, 1939.
Small breeds are considered older dogs around 10-12 years of age. Medium-sized breeds are considered older dogs, around 8-9 years of age. Large and giant breeds are considered older dogs around 6-7 years of age.
Depending on the breed and size of the dog, ages 10 to 12 are late middle age and beginning of old age.
Dog DNA testing can provide all the information you need to know about your dog’s breeds. A genetic age test uses a telomere measurement to show your dog’s exact biological age.