Enter your cat’s age to see a rough human-age equivalent and life stage, based on the International Cat Care chart.
International Cat Care counts the first two years as about 24 human years and each year after that as about 4. For younger cats, the calculator estimates between the points on International Cat Care’s chart (for example 6 months ≈ 10 years, 12 months ≈ 15 years, 18 months ≈ 21 years), so treat those as approximate.
Cats often hide signs of pain or illness, so regular vet checks matter more as they age.
According to International Cat Care, a 12-month-old cat is roughly equivalent to a 15-year-old person, and a 2-year-old cat to about 24.
International Cat Care counts each year after the first two as about 4 human years.
International Cat Care lists Senior as 11 to 14 years and Super Senior as 15 or more.
Last checked: November 10, 2026. This is a general estimate, not veterinary advice. Ask your vet about your pet’s life stage and care.
