Convert your cat's age to human years accurately using the veterinary-approved "15-9-4" rule.
*Calculations based on AAHA/AAFP Feline Life Stage Guidelines.
Your cat is approximately
in human years
Enter age to see result
The calculator above treats every cat the same. But neutering, lifestyle, breed, and body condition can shift your cat's real biological age by years in either direction.
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You've likely heard that one cat year equals seven human years. While simple, this rule is scientifically inaccurate. Cats don't age linearly; they mature incredibly fast in their first two years.