Cat Age Calculator
Use this cat age calculator to estimate a cat's age in human years. Enter cat age and the selected age conversion method and review an estimated equivalent age.
Human-equivalent age
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Life stage —
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How it works
Year 1 ≈ 15 human years, year 2 adds ≈9, then ≈4 human years per additional cat yearHow to use the Cat Age Calculator
Start by entering cat age and the selected age conversion method. Keep the units consistent and check that each value belongs to the same question.
The result gives an estimated equivalent age. Age comparisons are simplified and do not describe health or life expectancy. Use it as a guide and check any instructions, rules or professional advice that apply.
Frequently Asked Questions
What does this cat age calculator calculate?
It gives an estimated equivalent age. Age comparisons are simplified and do not describe health or life expectancy.
What information should I enter?
Enter cat age and the selected age conversion method. Use the same units throughout so the result is easier to understand.
Why is cat age not a simple multiplication?
Cats mature quickly in their early years, so common comparisons use different stages.