Cat Age Calculator
Find out your cat’s age in human years and its current life stage in seconds. Based on veterinary age-mapping guidelines, not the old “multiply by seven” myth.
Work Out Your Cat’s Human Age
Enter your cat’s age in years and months to see their estimated age in human years, along with their current life stage and what to expect at that age.
Cat Details
Enter your cat’s age to calculate their human-year equivalent
Age Evaluation
Estimated human-year age and life stage
Cat Age Chart
A general guide to how cat years map to human years across each life stage.
| Life Stage | Cat Age | Human Age (approx.) | What to Expect |
|---|---|---|---|
| Kitten | 0 – 6 months | 0 – 10 years | Rapid growth, vaccinations, socialisation |
| Junior | 6 months – 2 years | 10 – 24 years | Full size reached, high energy and play |
| Prime | 3 – 6 years | 28 – 40 years | Peak health, ideal weight maintenance |
| Mature | 7 – 10 years | 44 – 56 years | Slower metabolism, more regular check-ups |
| Senior | 11 – 14 years | 60 – 72 years | Joint support, dental care, wellness screening |
| Geriatric | 15+ years | 76+ years | Frequent vet visits, tailored senior diet |
Cat Age FAQ
Everything you need to know about feline ageing and life stages.
A cat’s first year of life is roughly equivalent to 15 human years, the second year adds around 9 more, and every year after that adds approximately 4 human years. This gives a much more accurate picture than the old rule of multiplying by seven.
No. The multiply-by-seven rule is a popular myth that does not reflect how cats actually age. Cats mature very quickly in their first two years and then age more slowly, so a tiered formula gives a far more realistic human-year equivalent.
Veterinary guidelines generally divide a cat’s life into six stages: kitten (0 to 6 months), junior (6 months to 2 years), prime (3 to 6 years), mature (7 to 10 years), senior (11 to 14 years), and geriatric (15 years and older).
Most veterinary associations classify a cat as a senior from around 11 years of age, which is roughly equivalent to a person in their early sixties. Senior cats generally benefit from more frequent health checks.