Cat Age Calculator: Cat Years to Human Years
Enter your cat's age to see the human equivalent and life stage.
How the calculation works
Cats mature very fast: the first year equals about 15 human years and the second year adds about 9 more. After age 2, each cat year equals roughly 4 human years. Ages under 1 year are approximate and based on typical kitten development.
Cat age chart
| Cat age (years) | Human age (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 |
FAQ
How old is my cat in human years?
By the AAHA/AAFP life stage guidelines, a 1-year-old cat is about 15 human years, a 2-year-old about 24, and each year after that adds about 4 human years.
What are the life stages of a cat?
Kitten: birth to 1 year. Young adult: 1-6 years. Mature adult: 7-10 years. Senior: over 10 years (2021 AAHA/AAFP Feline Life Stage Guidelines).
How long do indoor cats live?
Many indoor cats live into their mid-teens, and some reach 20 or more. Regular vet checks become more important from the senior stage.