Cat years is life expectancy of a cat, typically 12-15 years. However, a cat kept indoors may live to at least 21 years. This compares to a world average for humans of 67.2 years. A one-year-old cat may be compared to a 15-year-old-human. This proportion narrows as the cat gets older so that when the cat is 15 it is equivalent to a 76-year-old person.
Cat years compare to human years:
| Cat Years | Human Years |
|---|---|
| 1 | 15 |
| 2 | 24 |
| 3 | 28 |
| 4 | 32 |
| 5 | 36 |
| 6 | 40 |
| 7 | 44 |
| 8 | 48 |
| 9 | 52 |
| 10 | 56 |
| 11 | 60 |
| 12 | 64 |
| 13 | 68 |
| 14 | 72 |
| 15 | 76 |
| 16 | 80 |
| 17 | 84 |
| 18 | 88 |
| 19 | 92 |
| 20 | 96 |
