4 cat years in human years
≈ 32 human years. Life stage: Adult (prime).
The estimate: about 15 human years for the first year, nine more for the second (so 24 at age two), then roughly four per year after that. At 4 years, that lands at 32.
Part-way through year 4
| 4 yr 0 mo | 32 human years |
|---|---|
| 4 yr 3 mo | 33 human years |
| 4 yr 6 mo | 34 human years |
| 4 yr 9 mo | 35 human years |