Enter your cat’s age to see the human equivalent — based on AAHA/AAFP Feline Life Stage Guidelines.
Cats age fastest in their first two years: a 1-year-old cat equals about 15 human years and a 2-year-old cat about 24. After that, every cat year adds roughly 4 human years. This calculator follows the AAHA/AAFP Feline Life Stage Guidelines.
The chart below shows the human-age equivalent for cats aged 1–15 years, using the same AAHA/AAFP Feline Life Stage Guidelines as the calculator.
| Cat age | Human age |
|---|---|
| 1 years | 15 |
| 2 years | 24 |
| 3 years | 28 |
| 4 years | 32 |
| 5 years | 36 |
| 6 years | 40 |
| 7 years | 44 |
| 8 years | 48 |
| 9 years | 52 |
| 10 years | 56 |
| 11 years | 60 |
| 12 years | 64 |
| 13 years | 68 |
| 14 years | 72 |
| 15 years | 76 |
Under AAHA/AAFP guidelines, cats are senior from about 11 years old and geriatric from 15. Many indoor cats live into their late teens or twenties with good care.
No. A 1-year-old cat is about 15 in human years, and a 2-year-old cat about 24. After that, each cat year adds roughly 4 human years.
About 15 human years — the equivalent of a human teenager.
About 56 human years, which is why a 10-year-old cat is considered mature-to-senior.
Veterinarians generally classify cats as senior around 11 years old and geriatric around 15, though indoor cats often stay healthy well beyond that.
Yes. Indoor cats typically live 12–18 years, while outdoor cats average 2–5 years because of traffic, predators and disease risks.