About the Cat Age Calculator
Your cat’s age in human years using the standard feline ageing scale.
Also known as: cat years calculator, how old is my cat in human years, kitten age, feline age.
How to use this calculator
- Enter cat’s age, lifestyle.
- The result updates instantly as you type — press Calculate (or Enter) at any time.
- Review the breakdown shown under the main result.
- Use Copy result or Share to save the answer or send a link with your inputs.
Formula
Year 1 = 15, year 2 = +9, then +4 per year
Worked example
Using the values pre-filled in the calculator above:
- Cat’s age = 7 years
- Lifestyle: Indoor (15–17 years)
the calculator returns:
- In human years: 44
- Life stage: Mature
- Typical life expectancy: 16 years
- Years remaining (average): 9