How we worked it out
Updated as you change the numbers.
- First year = 15 human years, second year = 9 more (24), then 4 human years for each further year.
Method and assumptions
A widely used rule of thumb from feline health organizations. Cats age at different rates, and indoor cats often live into their late teens.
Questions
How old is a 5-year-old cat in human years?
About 36.
Sources
Method and figures checked on . Every worked answer on this page is covered by an automated test. Found a mistake? Tell us.