As a general guideline, though, the American Veterinary Medical Association breaks it down like this: 15 human years equals the first year of a medium-sized dog's life. Year two for a dog equals about nine years for a human. And after that, each human year would be approximately five years for a dog.
One year of a medium-sized dog's life equals about 15 human years. The second year of a dog's life equals about 9 human years. After the second year, each human year equals about 5 years for a dog.
Some mathematicians feel that a 1-year old dog should be compared to a 10- to 15-year old human. The second year, as development levels out, should equate to 3 to 8 years of human aging. That would put a 2-year old dog on par with a 13- to 23-year old human. But that is still a big range.
So a 7-year-old dog would be roughly 62.1 human years old.
Well, dogs are in possession of 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 more quickly. A dog that's a year old is the equivalent of a human child ready to start school.
Year two for a dog equals about nine years for a human. And after that, each human year would be approximately five years for a dog.
420 Dog years old, 60 yrs old b-day equivalent in human age.
Although all puppies are officially considered adult dogs once they reach one year old, puppies continue to grow in height and size while their bones are still developing, which takes anywhere from 6 to 24 months. Their skeletal growth is what determines how tall they will become as adults.
If you're anything like us, you'll probably continue referring to your dog as a puppy until they're old and grey! But generally speaking, a puppy is officially considered an adult dog between the ages of 1 - 2 years, once their bones have fully developed and they've reached their final height and size.
Physical Maturity: Physically speaking, dogs are fully grown by the time they're 1 year old, although large breeds may keep growing until they're 2 years old.
The first year of a dog's life is equal to 15 human years. The second year of a dog's life is equal to about nine human years. Each additional year is equal to about four or five human years.
Australian Cattle Dogs
Bluey, an Australian cattle dog, entered the Guinness Book of World Records by living to the ripe old age of 29 years and 5 months, setting the record for oldest dog ever.
The best way to determine the age of a puppy is by looking at their teeth. All of a puppy's baby teeth should erupt between 3 and 6 weeks of age and their adult teeth should appear between 12 and 16 weeks of age at the front of the mouth and between 16 and 24 weeks toward the back.
A 13- to 15-year-old dog, depending on her size and health, is roughly equivalent to a 70- to 115-year-old person.
The first year of a dog's life is equal to 15 human years. The second year of a dog's life is equal to about nine human years. Each additional year is equal to about four or five human years.
The easy way to calculate a dog's age is to take 1 dog year and multiple it by 7 years. This is based on an assumption that dogs live to about 10 and humans live to about 70, on average. For example, a dog which is 5 years old is 35 “human years.”
At four years old, your doggo is definitely passed the puppy stage. Since they are not yet old and gray, where does that leave them? In the woofderful adult stage! Adult dogs are a delight to have around.
At four months old, he is probably roughly the same age as a two or three-year-old human.