Cat Age Converter

Convert your cat's age to human years, including months for kittens.

Cat's age (years):

…or months:

–Human years

–Life stage

How to use

Enter age in years or months — human equivalent appears; everything runs in your browser.

How fast do cats age?

Year one ≈ 15 human years, year two ≈ 9 more, then about 4 per year.

Do indoor cats live longer?

Often yes — 15–20 years indoors vs much less outdoors on average.

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