About your cat
About your cat
Result
Cat’s age in human years
Enter your cat’s age or date of birth.
Cat’s age in human years
–human years
Cat’s age–
Lifestyle–
Next birthday–
Your cat’s age journey
Compare their current age, next birthday and estimated start of the senior stage
–
–human years
How is a cat’s age calculated?
Cats mature much faster than humans during their first years
01
First year
A one-year-old cat is approximately equivalent to a 15-year-old person.
02
Second year
At two years old, a cat is roughly comparable to a 24-year-old person.
03
Later years
From the third year, each cat year adds approximately four human years.
04
Individual differences
Breed, genetics, body condition, diet, environment and health can affect ageing.
Cat age in human years: chart
Approximate cat-to-human age equivalents
| Cat age | Human age | Life stage |
|---|---|---|
| 1 year | 15 | Young adult cat |
| 2 years | 24 | Young adult cat |
| 3 years | 28 | Young adult cat |
| 5 years | 36 | Young adult cat |
| 7 years | 44 | Mature cat |
| 10 years | 56 | Mature cat |
| 11 years | 60 | Senior cat |
| 15 years | 76 | Senior cat |
| 20 years | 96 | Senior cat |
Frequently asked questions
Practical answers about cat years and life stages
No. Cats mature much faster during their first two years: one cat year is about 15 human years and two cat years about 24.
The first year is estimated at 15 human years, the second at 24, and every later year adds approximately four.
Not in this simple comparison. Breed, genetics, body condition and health can still affect an individual cat’s ageing and lifespan.
This calculator shows the senior stage from about 11 years. Individual health and care needs can differ.
Choose “I know the age” and enter an estimated number of years and months. A vet may also estimate age from teeth, eyes, coat and body condition.
No. Lifestyle only changes the care tip, because cats that go outdoors face different risks.
Cat years and human years are not the same
A cat age calculator makes it easy to compare your pet’s age with a human life stage. It is a fun comparison, but life stage can also guide activity, diet and preventive checks.
The “multiply by seven” rule ignores a kitten’s rapid development. A one-year-old cat is already comparable to a teenager, and a two-year-old to a young adult.
This calculator uses the simple 15–9–4 model: 15 human years for the first year, nine more for the second and about four for every year after that. It is a guide, not a biological test.
International Cat Care: cat age in human years · AAHA/AAFP feline life-stage guidelines