🎂 Cat Age Calculator: Cat Years to Human Years
Cats race through childhood: a one-year-old cat is about 15 in human years and a two-year-old about 24. After that each year adds about four.
Years and months
The conversion
Year one ≈ 15 human years, year two ≈ 24, then about 4 human years for every cat year. A 12-year-old cat is about 64; a 20-year-old, about 96.
Life stages
Vets group cats as kittens (to 1 year), young adults (1–6), mature adults (7–10) and seniors (over 10). Senior cats benefit from twice-yearly check-ups, because kidney disease, an overactive thyroid and arthritis are common and treatable when caught early.
Frequently asked questions
How old is a 10-year-old cat in human years?
About 56 human years.
At what age is a cat a senior?
From about 11 years old.
These calculators give general estimates for healthy pets. They are not veterinary advice — if your pet is unwell or has eaten something it shouldn’t, call your vet.