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How Old Are Dogs In Human Years? Not Necessarily Human Age Multiply By 7

by Ferre Keira
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Have you ever heard of “dog age is human age multiplied by 7”? A University of California San Diego (UCSD) study found that there are methods for calculating dog age that is closer to human age.


Study shows dog age is not human age multiplied by 7. (Photo via Pixabay.com)

San Diego, CA (Merxwire) – If you have a pet dog, you should want to know how old it is in human years. In the past, people used to calculate a dog’s age by multiplying the human age by 7 as a reference, but have you thought about it? Dogs have different breeds, body types, and genetics, but we use the same method to calculate dog age. How can this result be correct?

In 2020, UCSD reshaped the conversion of dog age and human age through DNA Methylome. The researchers studied and analyzed the genetic data of about 100 Labrador puppies and adult dogs and compared them with 320 humans between 1 and 103. They found that dog age is not directly equal to human age multiplied by 7.

The results show that a one-year-old dog is equivalent to 30 human years old, a dog about to turn 4 years old is equivalent to 54 human years old, and a dog about to turn 14 years old is about 70 years old. Want to know how old a dog is in human years? The team proposed a method with more accurate numbers. Function: human_age = 16 ln(dog_age) + 31

“Dogs are an interesting animal to study,” said senior author Trey Ideker, PhD, professor at UC San Diego School of Medicine and Moores Cancer Center.

“Given how closely they live with us, perhaps more than any other animal, a dog’s environmental and chemical exposures are very similar to humans, and they receive nearly the same levels of health care. It’s also important that we better understand their aging process, as veterinarians frequently use the old 1:7 years ratio to determine a dog’s age and use that information to guide diagnostic and treatment decisions,” Ideker said.

Small dogs generally live longer than larger dogs. (Photo via Pixabay.com)

On the other hand, some breeds of dogs can live longer, some breeds cannot, and lifespan is related to body size; small dogs have a longer lifespan, and large dogs have a shorter lifespan. For example, the Beagle is a relatively long-lived dog, with an average lifespan of 12 to 15 years; the Bordeauxdog is a relatively short-lived dog, with an average lifespan of 5 to 8 years.

In 2016, a study from the University of Kansas showed that dogs are not necessarily 7 times as old as humans, and dogs age at different rates at different stages of growth. For example, different dog breeds have different adult stages, some of which are very long and some are very short, making it difficult to compare with human age.

From the UCSD study, it can be found that dogs are much older than people. ​If you have a pet dog, please cherish it and love it. Because it does not live long, it ages quickly, but most of its life is left to the owner.

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