13 cat years in human years
≈ 68 human years. Life stage: Senior.
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 13 years, that lands at 68.
Part-way through year 13
| 13 yr 0 mo | 68 human years |
|---|---|
| 13 yr 3 mo | 69 human years |
| 13 yr 6 mo | 70 human years |
| 13 yr 9 mo | 71 human years |