Here's a general guideline:
* First year: Counts as approximately 15 human years.
* Second year: Counts as approximately 9 human years.
* After the second year: Each cat year counts as approximately 4 human years.
Example:
* A 3-year-old cat is about 28 human years old (15 + 9 + 4).
It's important to note that these are just estimations. Factors like breed, health, and lifestyle can influence a cat's aging process.