How to use it
- Enter your cat’s age in whole years and months.
- Read the human-age equivalent.
How it works
This is the common chart, a rule of thumb rather than a scientific model. Up to 1 year: age × 15. From 1 to 2 years: 15 + (age − 1) × 9. After 2 years: 24 + (age − 2) × 4.
Worked example
A 5-year-old cat: 24 + 3 × 4 = 36 human years. A 15-year-old cat: 24 + 13 × 4 = 76.
Tips
- For care questions, such as diet and check-ups for senior cats, ask your vet. Age alone does not tell you the cat’s health.
- Dogs have their own chart: try the dog age calculator.