How cat years convert to human years
Cats grow up quickly: by their first birthday they are roughly equivalent to a 15-year-old human, and by two they are about 24. After that, each cat year equals about four human years. Unlike dogs, cats of different sizes age at similar rates.
Cat age chart
| Cat age | Human equivalent | Life stage |
|---|---|---|
| 1 months | 1 | Kitten |
| 3 months | 4 | Kitten |
| 6 months | 10 | Kitten |
| 1 year | 15 | Young adult |
| 18 months | 21 | 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 | Senior |
| 11 years | 60 | Senior |
| 12 years | 64 | Senior |
| 13 years | 68 | Senior |
| 14 years | 72 | Senior |
| 15 years | 76 | Senior |
| 16 years | 80 | Senior |
| 18 years | 88 | Senior |
| 20 years | 96 | Senior |
| 22 years | 104 | Senior |
Cat life stages
- Kitten (birth-1 year): rapid growth; feed a complete kitten food.
- Young adult (1-6 years): peak health; focus on weight and dental care.
- Mature adult (7-10 years): metabolism slows, so watch calories.
- Senior (10+ years): screen for kidney disease, hyperthyroidism, diabetes and arthritis.
Indoor cats often live 13-17 years or more. Keeping your cat lean is one of the best ways to support a long life; use our cat food calculator to check portions.
Frequently asked questions
How old is a 10-year-old cat in human years?
About 56 human years.
How old is a 1-year-old cat in human years?
About 15 human years.
What is the oldest age for a cat?
Many cats live into their late teens. The oldest verified cat, Creme Puff, lived to 38.
When is a cat considered senior?
Feline guidelines generally define cats over 10 years as senior.