LifestyleCalc

Cat Age Calculator

Convert cat years to human years using veterinary guidelines. See your cat's life stage and equivalent human age.

Calculate Your Cat's Human Age

Human Equivalent Age

32

human years

Adult

Your 4-year-old indoor cat is equivalent to a 32-year-old human.

Cat Age Progression: Indoor vs Outdoor

How It Works

Cats age rapidly in their first two years, reaching the equivalent of 24 human years by age two. After that, each cat year equals roughly 4 human years for indoor cats, or 5 for outdoor cats.

This calculator uses veterinary guidelines from the American Association of Feline Practitioners (AAFP) and the American Animal Hospital Association (AAHA) to give you an accurate conversion.

Understanding your cat's true age helps you provide age-appropriate care, diet, and veterinary attention throughout their life stages.

Cat Age to Human Age Reference Table

Cat AgeIndoor (Human Years)Outdoor (Human Years)Life Stage
1 year1515Junior
2 years2424Adult
3 years2829Adult
4 years3234Adult
5 years3639Adult
6 years4044Mature
7 years4449Mature
8 years4854Mature
9 years5259Mature
10 years5664Senior
11 years6069Senior
12 years6474Senior
13 years6879Senior
14 years7284Senior
15 years7689Geriatric
16 years8094Geriatric
17 years8499Geriatric
18 years88104Geriatric
19 years92109Geriatric
20 years96114Geriatric

Frequently Asked Questions