Cat Age Calculator
Cat years converted to human years.
Enter your values
ⓘ Live results
Results
- Human-equivalent age
- 44 years
- Life stage
- Mature
- Typical life expectancy
- 15 years
- Estimated years remaining
- 8 years
- Vet check frequency
- Annually
Quick answer
A cat's first year equals about 15 human years, the second adds 9, and every year after adds roughly 4.
Human years = 24 + (age − 2) × 4
How to use the Cat Age Calculator
- 1Enter your cat's age.
- 2Choose indoor or indoor–outdoor.
- 3Read the human-equivalent age and life stage.
Worked example
Using the values the calculator loads with:
Inputs
- Cat's age7 years
- LifestyleIndoor
Results
- Human-equivalent age44 years
- Life stageMature
- Typical life expectancy15 years
- Estimated years remaining8 years
- Vet check frequencyAnnually
Frequently asked questions
How long do indoor cats live?
Commonly 13–17 years, versus 10–12 for cats with outdoor access, mostly due to traffic, disease and predation.
When is a cat a senior?
Around 11 years, though vets start twice-yearly screening from about 10.
About this calculator
- Built and reviewed by James Whitfield · How we build and test calculators
- Report an error
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.