What is the Cat Age Calculator?
Convert a cat's age into human years.
Enter cat's age and the Cat Age Calculator returns age in human years. Results update as you type, and nothing you enter leaves your device.
How it is calculated
First year = 15 human years, second year = 9, then 4 for each further year
How to use it
- Enter cat's age in years.
- Read age in human years in the results panel. It updates as you type.
- Change any value to compare scenarios, or use Share to send the result as a link.
Worked example
Common questions
What formula does the Cat Age Calculator use?
It uses: First year = 15 human years, second year = 9, then 4 for each further year.
What do I need to use the Cat Age Calculator?
You need cat's age. Sensible starting values are filled in so you can see how it works straight away.
Is the Cat Age Calculator free, and is my data stored?
It is free with no sign-up. The calculation runs in your browser, so the values you enter are not sent to or stored on our server.