Dog Age Calculator
Convert your dog's age into human years using a size-adjusted formula, since small and large breeds age at different rates.
29 years
in human years
Dogs age fastest in their first two years, then the rate slows and varies by size. Larger breeds tend to age faster in adulthood than small breeds, which is why size affects the result here.
About the Dog Age Calculator
A dog age calculator converts your dog's age into equivalent human years, using a size-adjusted formula since small and large breeds age at noticeably different rates.
How to use
1
Enter your dog's age in years.
2
Select your dog's size category, from small to giant breed.
3
View the equivalent age in human years.
Frequently asked questions
Why does a dog's size affect its aging rate?
Larger breeds tend to mature faster in their early years but also age more quickly in adulthood, while smaller breeds mature a bit slower but often live longer overall.
Is the classic '1 dog year equals 7 human years' rule accurate?
No, that's an oversimplification. Dogs age much faster in their first two years, then the rate slows and varies significantly depending on their size.
Explore more tools in the Calculators category.