If you’ve adopted a puppy or dog but don't know their history, you may not know how old they are. Answer a few simple questions and find the right dog for you, Compare up to 5 different breeds side by side, Browse the AKC Marketplace to find the right puppy for you, Browse our extensive library of dog names for inspiration, Find out the best and worst foods for your dog and which to avoid, How to Calculate Dog Years to Human Years, 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. For example, irrespective of whether he is small, medium or large, a dog that is 1 year old is about 15 years old in dog years. For instance, a 4-year-old dog is 53 in human years, and a 10-year-old dog is 67.8 in human years. This is the traditional method of calculating a dog’s “human” age. Turns out, the math isn't that simple. Dogs live for between 10 and 13 years on average. Dogs can grow very quickly from an early age with their first year being the equivalent of 15 human years. A one-year-old dog is similar to a 30-year-old human. As the chart shows, younger dogs age especially quickly compared with humans. The first two years of a small dog’s life is roughly the same as 12.5 human years, while it’s 10.5 for a medium dog, and nine for large dogs. Founded in 1884, the AKC is the recognized and trusted expert in breed, health, and training information for dogs. The National Center for Health Statistics doesn’t keep records for dogs. When a dog hits age 10, he is firmly in his senior years. According to this formula, a 2-year-old dog would be equivalent to a 42-year-old human. So, if man's best friend got the grand old age of 10, dog lovers would consider that animal to be 70. And after that, every human year equals approximately four or five years … 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. Finally, the more a dog is big (from is breed), the more its youth will be slow, but it would then get old more quickly, and its life would be shorter. Most dog lovers have heard the old adage that one human year is equal to seven years for our canine friends. This is mainly due to selective breeding. Then by seven years old, dog aging slows. Instead, there are three main sources for data on their longevity: pet-insurance companies, breed-club surveys, and veterinary hospitals. Aging gracefully — The old one-to-seven calculation comes from a simple idea: Dogs live around 12 years, while humans live around 80 years, so you … The second year of a dog’s life is equal to about nine human years. Again, keep in mind that these are rough estimates. An example would be the Great Dane. c. Giant dogs: Use the number on the brown background. Scientists at UC San Diego say they have debunked that myth — … Then by seven years old, dog aging slows. Forget the old myth that one human year equals seven dog years. In her elder years, it is harder for your dog to learn new things. Typically, dogs will have an equivalent age of approximately fifteen years at one calendar year. In general, “little dogs live to about 15 to 20 years of age, while bigger dogs live to about 12 to15 years.," Nunez says. While the table above gives you a more accurate indicator of how old your dog is in human years, you may prefer a less accurate but more straightforward method. How old is your dog in human years? That's a lot of math! Scientists at UC San Diego say they have debunked that myth — … So the first year of your fuzzy friend’s life is equal to about 15 human years. At 2 years old, he is 24 in dog years. That's a lot of math! The results allowed them to derive a formula for adjusting dogs’ ages to “human years”, by multiplying the natural logarithm of the dog’s age by 16 and adding 31 (human_age = 16ln(dog_age) + 31). When it comes to how old we imagine our dogs to be in human years, most of us use a calculation that says dogs age seven years for every one human year. Enter your dog's details below . By this time, dog aging has slowed down, so an 8-year-old dog is like a 64-year-old human. The first year of a dog’s life is equal to 15 human years. Their teeth should give you a rough idea of their age. https://www.akc.org/wp-admin/admin-ajax.php. it notes that “dogs mature more quickly early on.” So a one-year-old dog is roughly the same age as a 15-year-old human. Most humans know that dogs age faster than humans. According to the American Veterinary Medical Association: The first year of a medium-sized dog’s life is 15 years of a human’s life. At the end of this adolescent stage, when a dog is around 2 years old, the human equivalent is 24 years. Whether measured in human years or dog years, as our dogs mature and age there is beauty and charm at every step along the way. It’s known that different breeds age differently, so the UCSD formula may lack enough variables for conclusive results. Dogs do not age at a rate of 7 human years for each year in dog years. So a 10 year old dog is basically the equivalent of a 53 year old human. Different breeds age differently, with small dogs in general living longer than large ones. This natural logarithm calculator can help. An old adage exists that every year your dog ages is equivalent to seven human years. When a dog hits the three year mark, he ages 4 years to every 1 human year bringing the ratio to 4:1. If you’ve been asking yourself the question ‘how old is my dog in human years’, you are not alone. A 4-year-old dog is similar to a 52-year-old human. All rights reserved. Regardless, the new science-backed formula put forth is certainly more useful to those looking to calculate dogs’ “human age” than the long-debunked “multiply by 7” myth. You'll notice that as the years go on, the rate of aging compared to human years changes by size. As your dog ages his needs will start to change. We were under the impression that seven Dog years equaled one human year. A 2-year-old dog is equivalent to a young teenager, et cetera. According to this formula, a 2-year-old dog would be equivalent to a 42-year-old human. All rights reserved. Even if you don’t know the birth date, you can still guess their age. By the time a dog reaches the age of 12 months, its age equivalent to a human has reached 20 years. By the time they reach their first birthday, they’re already 15 human years old and, by 2, they’re the equivalent of 24 human years. This website will tell you how old your dog would be if he/she was a human. By 13, a Yorkie is equivalent to a 68-year-old human. So, if man's best friend got the grand old age of 10, dog lovers would consider that animal to be 70. Year two for a dog equals about nine years for a human. 1. A huge pup might age more slowly at first, but be nearing middle age at 5. Step 4 WebMD veterinary experts provide comprehensive information about pet health care, offer nutrition and feeding tips, and help you identify illnesses in pets. After two years, a canine will age three to five dog years per calendar year. In her elder years, it is harder for your dog to learn new things. According to this theory, a 4-year-old dog would be 28 years old in "human years." Gray hair. Dachshunds are small dogs, so tend to live longer than larger breeds. It was a way to encourage owners to bring in their pets at least once a year.”. You've heard of "dog years" but do you know what it means? The larger the dog, the faster it ages. 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. It’s a commonly-searched term. Life expectancy of the dog: a dog can live 10 to 15 years depending on his size (and his breed). By the time a dog reaches seven-years-old … He tells the Wall Street Journal that it was “a way to educate the public on how fast a dog ages compared to a human, predominantly from a health standpoint. Senior dogs might show some specific signs of aging. Help reduce her stress by keeping such changes to a minimum. As a general guideline, though, the American Veterinary Medical Association breaks it down like this: There are many several factors to consider, so it’s not possible to pin it down precisely, but the AVMA says: “Cats and small dogs are generally considered ‘senior’ at seven years old, but we all know they’ve got plenty of life left in them at that age. The previously accepted theory regarding a dog’s age in “human years” (accepted, at least, by the general population, if not scientists who can sometimes be overly concerned with things like accuracy) told us that to calculate our dog’s “human” age we multiply their actual age by seven. a 7-year-old dog is like a 62-year-old human. Evidently, people have been comparing human-to-dog years for centuries. How Old is a 16 Year Old Dog in Human Years? My Australian Cattle Dog mix, Candy, just turned 10. AKC actively advocates for responsible dog ownership and is dedicated to advancing dog sports. Small and medium-size dogs age slower than large and giant size dogs. In a nutshell, the first year of a dog’s life equals 15 human years. Help reduce her stress by keeping such changes to a minimum. Cross and Mix breeds tend to live longer than purebreds, because of their wide genetical spectrum they are more resistant to diseases. A four-year-old dog is similar to a 52-year-old human. Each additional year is equal to about four or five human years. ", Purina: "Your Dog's Age in Human Years," "Caring For Your Older Dog. If your dog was a human, how old would he be? WebMD explains. Note : Small dog = dog under 15kg, Average dog = dog from 15 to 45 kg, Big dog = dog over 45 kg. In both species, methyl groups are added to DNA molecules throughout aging, altering DNA activity without altering the DNA itself. © The American Kennel Club, Inc. 2020. Here is a selection of longevity secrets of readers' pets who lived past 100 'dog years' . It starts around the muzzle then spreads to other areas of the face, head, and body. Most dog lovers have heard the old adage that one human year is equal to seven years for our canine friends. Do you wonder how old your dog is in human years? However, their second year is equivalent to 9 human years and, once they reach maturity and become adults, each year is the same as 4 human years. With their gray muzzles and wise expressions, senior dogs are especially lovable and poignant. https://www.akc.org/subscription/thank-you. In fact, she likely will be resistant to changes in her surroundings and routine. Dog Years to Human Years 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. AVMA: "Frequently Asked Questions about caring for an older pet. A one-year-old dog is similar to a 30-year-old human. A four-year-old dog is similar to a 52-year-old … Welcome to the new WebMD Pet Health Center. Turns out, the math isn't that simple. A 2019 study by researchers at the University of California San Diego put forth a new method for calculating dog age, based on changes made to human and dog DNA over time. WebMD does not provide medical advice, diagnosis or treatment. Dogs mature more quickly than we do early on. Each additional year of the dog’s life is then multiplied by between 4.3 and 13.4 years, depending on the breed, to find their human age. Learn more about dogs and aging, including ways to tell how old your dog could be. The second year of his life is already a little bit slower, and it equals approximately 10 human years. Please select your dog's current age and the size of your dog's breed during adulthood. If these statistics were accurate, between 1268 and the mid-20th century, dogs had a year trimmed off their lifespan, and we lost almost a decade. Bigger dogs are considered older at around six years, and smaller dogs become older at around eight or nine. Scientists plan future studies to better explain the link between growth and mortality. By 10, a Yorkie is equivalent to a 56-year-old human. A 3 month old puppy could be comparable to a 3 year old human, but at 6 months the comparison would be closer to a human aged 10 years. Ever wonder how old your dog is in human years? If you own a dog, you've heard this rule: 1 year for Fido equals 7 years for you. So the dog:human ageing ratios is 10.5:1 rather than 7:1. Finally, the more a dog is big (from is breed), the more its youth will be slow, but it would then get old more quickly, and its life would be shorter.Life expectancy of the dog: a dog can live 10 to 15 years depending on his size (and his breed). But how old would they be? Larger-breed dogs tend to have shorter lifespans compared to smaller breeds and are often considered senior when they are 5 to 6 years of age. Download this e-book to learn what to expect and get helpful tips on caring for your senior dog. How do you calculate how old a dog is? Your dog's age 0 human years. Luckily for both species, our lifespans have gone in the other direction. Using this formula, a two-year-old dog is 42.1 in human years, a five-year-old-dog is 56.8 and a ten-year-old dog is 67.8! ", National Pet Wellness Month: "Pet Age Calculator," "Pet Aging Chart. But then a dog’s aging rate slows down a lot after the early years — and this formula takes that into account. Therefore, a 4-year-old Great Dane would already be 35 in human years. The second year of a dog’s life equals about nine years for a human. By this math, a dog lives to nine, a man to 80. For instance, a 4-year-old dog is 53 in human years, and a 10-year-old dog is 67.8 in human years. Top tips for staying safe around dogs. Size and breed also play a role. 15 human years equals the first year of a medium-sized dog’s life. By the time a dog reaches the age of 12 months, its age equivalent to a human has reached 20 years. A large 5-year-old is approximately 42 in human years. Generally, a two month old Labrador Retriever puppy has the body age of a three year old child. Some use the term 'dog years' to mean 'human age equivalent years' while the scientific literature prefers the term 'human years' as more accurate. at Washington State University, who compiles studies about longevity in dogs. If so, the general rule to follow is that your dog ages 15 human years in year one, 9 years in year two, and 5 years thereafter. ", Humane Society: "How to Determine a Cat's or Dog's Age.". The larger the dog, the faster it ages. But many of us go by a well-known "rule of paw" that one dog year equates to 7 human years. After that, the dog’s ageing pace is determined by its size and breed. “This makes sense when you think about it — after all, a nine-month-old dog can have puppies, so we already knew that the 1:7 ratio wasn’t an accurate measure of age,” Ideker said. Year two for a dog equals about nine years for a human. 1:01. A medium-sized dog is between the two and the equivalent of 60 in human years. At two calendar years, dog will have aged to twenty-four human years. The reason why is still unknown, though Kraus puts forward several possibilities, including that larger dogs may succumb to age-related illnesses sooner and that the accelerated growth of large dogs may lead to a higher likelihood of abnormal cell growth and death from cancer. So a 1-year-old dog is roughly the same, developmentally, as a 7-year-old human. Thus, a one-year-old dog is roughly the same age as a seven-year-old human, and a ten-year-old dog is roughly equal to a seventy-year-old human. See our dog age calculator and our dog year chart for easy reference. Contrary to popular belief, dogs do not age at a rate of 7 human years for each year in dog years.”. So, what about Labs? At the end of this adolescent stage, when a dog is around 2 years old, the human equivalent is 24 years. With the Dog Age Calculator, you can easily find out the age of your dog in human years. A 3 month old puppy could be comparable to a 3 year old human, but at 6 months the comparison would be closer to a human aged 10 years. How Old Is My Dog In Human Years? A 1-year-old dog’s age in human years is approximately 15 years old, and the dog ages 3/4 of a human year for each month after that until the dog reaches 2 years old, or approximately 24 years old in human years. The second year of a dog’s life equals about nine years for a human. Year two for … This phenomenon has baffled scientists for years, and research has yet to explain the relationship between body mass and a dog’s lifespan. The previously accepted theory regarding a dog’s age in “human years” (accepted, at least, by the general population, if not scientists who can sometimes be overly concerned with things like accuracy) told us that to calculate our dog’s “human” age we multiply their actual age by seven. 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