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Cat Age Calculator

Convert your cat's age to human years and discover their life stage with age-appropriate care tips.

Calculator Inputs

Cat Information

Enter your cat's current age in years (you can use decimals for months, e.g., 1.5 for 18 months)

Enter age in years. For kittens under 1 year, use decimals (e.g., 0.5 for 6 months)

This affects life expectancy context but not the age calculation

This calculator provides general guidance only and is not a substitute for professional veterinary advice. Always consult your vet for health concerns.

Frequently Asked Questions

How is cat age calculated in human years?
Cat age conversion uses a non-linear formula. The first year of a cat's life equals approximately 15 human years, the second year adds 9 more (totaling 24), and each year after that adds about 4 human years. This reflects cats' rapid early development followed by slower aging.
At what age is a cat considered a senior?
Cats are generally considered seniors at 11 years old (equivalent to about 60 human years). However, many veterinarians now classify cats as "mature" at 7-10 years and "senior" at 11-14 years, with cats 15+ years considered "geriatric."
Do indoor cats age differently than outdoor cats?
Indoor cats typically live longer than outdoor cats—averaging 12-18 years compared to 2-5 years for outdoor cats. While the biological aging process is similar, indoor cats face fewer risks from traffic, predators, diseases, and environmental hazards.