* The first year of a cat's life is equivalent to about 15 human years.
* The second year is roughly equal to 9 human years.
* After that, each cat year is about 4 human years.
So, it's not a simple conversion. To get a more accurate estimate, you'd need to know the cat's exact age in cat years.
Let me know if you have a specific cat age in cat years, and I can try to help you figure out the human equivalent!