What is eight years in human to cat years?

There's no single, universally accepted conversion for human years to cat years. However, here's a common way to estimate:

* First 2 years: Each cat year is equivalent to about 15 human years.

* Years 3-8: Each cat year is equivalent to about 4 human years.

* Beyond 8 years: Each cat year is equivalent to about 2-4 human years.

So, for an eight-year-old cat:

* The first two years are 2 * 15 = 30 human years

* The next six years are 6 * 4 = 24 human years

Therefore, an eight-year-old cat is roughly equivalent to 54 human years old.

Keep in mind this is just an estimate, and each cat ages at its own pace. It's always best to consult with a veterinarian for personalized advice about your cat's age and health.