Cat Age in Human Years

🐱 Cat Age in Human Years Calculator

Discover your cat's true human-equivalent age using the ISFM's official life-stage model — far more accurate than the old "multiply by 7" rule.

🐾 About Your Cat

Cat's Name (optional)

Age — Years

Age — Months

— or enter date of birth —

Date of Birth

Lifestyle

human years old

Cat's Actual Age

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Life Stage (ISFM)

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📋 Full Age Conversion Table

🐿️ Care Tips for This Life Stage

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🧪 How we calculate this: We follow the ISFM (International Society of Feline Medicine) life-stage model. Cats age very fast in their first two years (year 1 = 15 human years, year 2 = +9 = 24), then roughly 4 human years per cat year after that. Lifestyle and genetics also play a role — indoor cats typically live 2–5 years longer than outdoor cats.

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