Pet Age
Map a dog or cat’s age to human years: the first year counts as 15, the second adds 9, then a steady rate by size. An estimate, not veterinary advice.
Frequently asked questions
Is this veterinary advice?
No. It is a popular chart, not an exam. Ask a vet about health, diet, or senior care.
Why do large dogs age faster here?
After year two, large dogs add 6 human years per pet year, medium 5, small and cats 4.