Convert your cat's age into approximate human years with the commonly used cat-years chart.
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All results are approximate and are not veterinary advice.
How to Use the Cat Age Calculator
Enter your cat's age in years and press Calculate. The tool converts it into an approximate human age. Use Clear to reset the form.
How the conversion works
A cat's first year is counted as about 15 human years, and the second year adds about 9 more.
Each year after that adds roughly 4 human years, a widely used rule of thumb.
Indoor cats often age differently from outdoor cats; the chart is a general guide.
Results are for general interest and are not veterinary advice.
Features
Based on the common cat-years chart used by many vets and shelters
Accepts fractional ages, so kittens can be entered in decimals
Instant results with a single click and a copy button
Works on desktop, tablet and mobile with no sign-up
All processing runs locally in your browser. Your data is not uploaded to any server.