Cat Age Calculator — Cat Years to Human Years
How old is your cat in human years? Cats age faster in their early years — the first year is roughly equivalent to 15 human years, the second to 9 more, and each year after that adds about 4 human years. This calculator uses the American Animal Hospital Association (AAHA) feline life stage guidelines to give you a meaningful comparison.
How to Use This Calculator
- 1
Enter your cat's age in years (decimals like 1.5 are accepted).
- 2
Click Calculate to see the human-equivalent age.
Frequently Asked Questions
A 1-year-old cat is roughly equivalent to a 15-year-old human. Cats develop very rapidly in their first year, reaching sexual maturity and near-full growth.