Cat Age Calculator
Convert your cat's age to human years using the modern veterinary formula.
More accurate than the old 7:1 rule.
Human-Equivalent Age
Cat Age to Human Years uses the modern veterinary formula (not the old 7:1 rule):
First 2 years:
- Year 1 = 15 human years
- Year 2 = 24 human years (adds 9)
After age 2:
- Each additional cat year = ~4 human years
Human Age = 24 + (Cat Years - 2) × 4 (for cats older than 2)
Cat Life Stages:
| Stage | Cat Age | Human Equivalent |
|---|---|---|
| Kitten | 0–6 months | 0–10 years |
| Junior | 7 months–2 years | 12–24 years |
| Prime | 3–6 years | 28–40 years |
| Mature | 7–10 years | 44–56 years |
| Senior | 11–14 years | 60–72 years |
| Geriatric | 15+ years | 76+ years |