Cat Age Calculator: Cat Years to Human Years

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Cat Age Calculator: Cat Years to Human Years

Cats reach adulthood in their first two years, then age about four human years for every cat year.

Fill in the fields above to see the result.

Common questions

How old is a 10-year-old cat in human years?

About 56 human years: 24 for the first two years plus 4 for each of the next eight.

When is a cat a senior?

From about 11 years. Senior cats benefit from a vet check every six months, because kidney, thyroid and dental problems are common and easier to treat early.

How long do indoor cats live?

Many indoor cats live 13–17 years and some past 20, usually longer than cats that roam outside.

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