| Cat age | Human age | Stage |
|---|---|---|
| 1 month | 1 | Kitten |
| 2 months | 2 | Kitten |
| 3 months | 4 | Kitten |
| 4 months | 6 | Kitten |
| 6 months | 10 | Kitten |
| 7 months | 12 | Kitten |
| 18 months | 21 | Kitten / young adult |
| 1 year | 15 | Young adult |
| 2 years | 24 | Young adult |
| 3 years | 28 | Young adult |
| 4 years | 32 | Young adult |
| 5 years | 36 | Young adult |
| 6 years | 40 | Young adult |
| 7 years | 44 | Mature adult |
| 8 years | 48 | Mature adult |
| 9 years | 52 | Mature adult |
| 10 years | 56 | Mature adult |
| 11 years | 60 | Senior |
| 12 years | 64 | Senior |
| 13 years | 68 | Senior |
| 14 years | 72 | Senior |
| 15 years | 76 | Super senior |
| 16 years | 80 | Super senior |
| 17 years | 84 | Super senior |
| 18 years | 88 | Super senior |
| 19 years | 92 | Super senior |
| 20 years | 96 | Super senior |
| 21 years | 100 | Super senior |
| 25 years | 116 | Super senior |
The rule of thumb
15 for the first year, 24 at two, then add 4 for each year after. A 9-year-old cat is 24 + (7 × 4) = 52.
Need months, or want to convert the other way? Try the cat age calculator or human years to cat years.
Frequently asked questions
Is one cat year 7 human years?
No. The first cat year is about 15 human years, the second about 9 more, and each later year about 4.