Dog Age Calculator (Dog Years to Human Years)
NewConvert a dog's age into approximate human-equivalent years using the American Veterinary Medical Association's guideline — more accurate than the old "multiply by 7" rule.
in human years
Frequently Asked Questions
Why not just multiply by 7?
The popular "1 dog year = 7 human years" rule dates back to the 1950s and doesn't reflect how dogs actually age — dogs mature much faster than humans early in life and then slow down, so a flat multiplier badly over- or under-estimates age depending on the dog's stage of life.
What does the AVMA guideline actually say?
A dog's first year of life is roughly equivalent to 15 human years, the second year adds about 9 more (24 total), and each year after that adds approximately 5 human years — reflecting the fast early maturation and slower aging afterward.
Does this account for breed size?
No — this uses the AVMA's general, non-breed-specific guideline. In reality, larger breeds tend to age faster and have shorter lifespans than smaller breeds, so a giant-breed dog's true human-equivalent age in its senior years is likely somewhat higher than this estimate.
Is this the same calculation used by veterinarians?
It's based on the same general AVMA public guideline that many vets reference when discussing aging with pet owners, though vets also consider breed, health history, and individual factors that a simple calculator can't account for.