Dog age in human years
Convert your dog's or cat's age into human years, by the animal's size.
How to useHow old is your pet in human years?
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Dog age in human years: what it is for
The calculator converts your dog's age into human years using the chart that changes with size, since large dogs age faster. It also calculates a cat's age.
The result also shows the life stage: puppy, young, adult, mature or senior.
How to use
- Choose dog or cat.
- Choose the dog's size.
- Type the age in years and months.
When to use it
- Curiosity about your pet.
- Knowing when your pet becomes a senior.
- Talking to the vet about age-appropriate care.
Frequently asked questions
Is it true that each dog year equals 7 human years?
No. Dogs mature very fast in the first two years and then age more slowly. Large dogs age faster than small ones.
What is the calculation based on?
We use the equivalence chart most used by veterinarians (based on the American Animal Hospital Association), which changes with size. It's an estimate, not a diagnosis.
Is it really free?
Yes, 100% free. No sign-up, no subscription and no usage limits. All Tools123 tools are free and run right in your browser.