How Old is Your Dog in Human Years?

Age Calculator

How old is your dog in human years?

We all know the saying "one dog year is seven human years". That's cute and all, but the truth is, it's quite inaccurate. Instead of a one-size-fits-all rule, scientists now use biological markers and breed size to estimate how dogs age in "human years." We have adopted this method to offer a more preciseand clearer picture of a dog"s developmental stage. Then, our innovative AI steps in, leveraging this precise age to deliver personalized health and lifestyle insights.

1

Choose your dog's size

2

Choose your dog's age

0 Years Old

  • How It Works

    The most recognized recent formula from the UC San Diego study is: Human Age=16×ln(Dog Age)+31

    Where :

    • ln means the natural logarithm (a math function used to measure rates of change).
    • Dog age is in years.
    • The result is the dog's age in equivalent human years based on biological aging.

    Why this formula works

    This formula is based on epigenetic changes—specifically methylation markers in DNA that accumulate over time in both dogs and humans.
    By comparing how these markers change with age in both species, researchers created a curve (not a straight line!) that maps dog years to human years more accurately.

  • Simple Terms

    Dogs grow up super fast in their early years, and scientists now use DNA changes (like a molecular clock) to match their biological aging to ours. That's why a 1-year-old puppy can be as mature as a 30-year-old human!