Cat Age Calculator
Your cat's age in human years, from the AVMA chart.
Enter your cat's age.
Not veterinary advice. PuppySizer gives estimates from published sources. It cannot examine your pet. For any health concern, ask your own veterinarian. Read the full disclaimer.
Cat years to human years, year by year
| Cat age | Human years |
|---|---|
| 1 year | 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 |
| 16 years | 80 |
Frequently asked questions
How old is a cat in human years?
The AVMA chart counts a 1-year-old cat as 15 human years and a 2-year-old as 24. After that each year adds 4: a 5-year-old cat is 36, a 10-year-old is 56, and a 16-year-old is 80.
Is it one cat year to seven human years?
No. On the AVMA chart a 7-year-old cat is 44, not 49, and a 1-year-old is 15, not 7. Cats grow up fast in the first two years.
Does breed or indoor life change it?
The AVMA says pet ages are approximate and that many factors may influence the aging process. The chart is a guide. Ask your vet for your cat's life stage and what checks it needs.
What about kittens under a year?
The AVMA chart starts at 1 year, so the calculator does not give a number for kittens.
Sources
- PETS age faster than PEOPLE. American Veterinary Medical Association. Read 2026-11-08. Used for: Human-year equivalents for cats and for a medium-sized dog (21 to 50 lb), ages 1 to 16.
Facts last checked against their sources on November 8, 2026. Read how the numbers are built on the sources and method page.