Cat Age Calculator
Convert your cat's age into human years using the commonly accepted feline aging scale, since cats mature quickly in their first year.
28 years
in human years
A cat's first year is roughly equivalent to 15 human years, the second year adds about 9 more, and each year after that adds about 4. Cats mature quickly early on, then age more steadily.
About the Cat Age Calculator
A cat age calculator converts your cat's age into equivalent human years, using the commonly accepted feline aging scale.
How to use
1
Enter your cat's age in years.
2
View the equivalent age in human years.
3
Recalculate as your cat gets older to track their life stage.
Frequently asked questions
How is a cat's first year equivalent to so many human years?
Cats mature very quickly in their first year, reaching a level of physical and social maturity roughly comparable to a 15 year old human by their first birthday.
Do indoor and outdoor cats age at the same rate?
This calculator uses a general aging scale that doesn't distinguish between indoor and outdoor cats, though lifestyle can affect a cat's overall health and lifespan.
Explore more tools in the Calculators category.