Convert your cat's age to human years. Includes life stage classification based on AAFP guidelines.
| Life Stage | Cat Age Range | Human Age Equiv. |
|---|---|---|
| Kitten | 0–6 months | 0–8 yrs |
| Junior | 7 mo–2 yrs | ~24 yrs |
| Adult | 3–6 yrs | 28–40 yrs |
| Mature | 7–10 yrs | 44–56 yrs |
| Senior | 11–14 yrs | 60–72 yrs |
| Geriatric | 15+ yrs | 76+ yrs |
The first year involves rapid growth equivalent to about 15 human years. The second year adds another 9 years, making a 2-year-old cat equivalent to a 24-year-old human.
Indoor cats typically live 12–18 years, while outdoor cats average 5–7 years. Outdoor cats face more risks including traffic, disease, and predators.
Per AAFP guidelines, cats aged 11–14 are classified as Senior, and 15+ as Geriatric — equivalent to roughly 60–72 and 76+ human years respectively.
Kittens need vaccinations and socialization; adults need annual checkups and weight management; seniors need biannual or more frequent exams and chronic disease monitoring.
A cat age calculator converts your cat's age into human years to help you understand their life stage and provide appropriate care. Unlike the outdated "1 cat year = 7 human years" formula, this tool uses a veterinary-validated method: the first year equals ~15 human years, the second year brings the total to ~24, and each year after adds 4 human years. Outdoor cats age about 20% faster after year 2 due to environmental stressors. Use this calculator to better understand your cat's health needs and work with your vet accordingly.