Pet Age Calculator
How old is your pet in human years?
Select your pet type and enter their age to convert dog or cat years into human-equivalent years using veterinary guidelines.
Please enter your pet's age.
—human-equivalent years
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Life stage
How it works
- Dogs: first year counts as 15 human years, the second as 9, each additional year as 5.
- Cats: first year counts as 15 human years, the second as 9, each additional year as 4.
- These are veterinary averages — size and breed cause some variation.
Frequently asked questions
Is the 7-year rule accurate?
No — it is a myth. The staged method used here reflects how pets actually mature.
Do small and large dogs age differently?
Yes — large breeds tend to age faster. This calculator uses a general average.
What about other pets?
This covers dogs and cats; other species age very differently.