Dog Age Calculator
How old is your dog in human years? Enter your dog's age and size — the old "times 7" rule is a myth, so we use a size-aware model for a realistic answer.
Breed size
In human years, is aboutyour dog is about
—
Frequently asked questions
How is dog age calculated in human years?
A dog's first year is about 15 human years, the second adds roughly 9 more, and each year after that adds 4–7 human years depending on size. Smaller dogs age more slowly than giant breeds.
Is the 'multiply by 7' rule accurate?
No — the old '1 dog year = 7 human years' rule is a myth. Dogs mature very fast early on, then slow down, and size changes the rate. This calculator uses a size-aware model instead.
Does breed size really matter?
Yes. Small dogs often live into their late teens, while giant breeds age faster and have shorter lifespans, so the same age in years means a different human age.