How Cats Age: A "Cat Years" Calculator
Cats and Cat Years Conversion
Converting between cat years and human years isn't as simple as using a factor of 7 (as some people erroneously think with dogs, and sometimes cats). The main reason is that cats mature quickly in the first couple of years of life. To convert cat age to an equivalent human age, an accepted method is to add 15 years for the first year of life. Then add 10 years for the second year of life. After that, add 4 years for every cat year. This means that by year two, a cat has matured to about the same as a 25 year old human.
So it isn't terribly complex, but you would have to do some figuring on paper or in your head. That's where this cat years calculator comes in handy.
For comparison and reference, the Cat Bible, a book by Tracie Hotchner, provides the following list:
The cat years calculator below converts cat age to human age or vice-versa. You can also place it on your own website or blog if you have one (especially nice for cat or pet-related websites).
1-month-old kitten = 6-month-old human baby
3-month-old kitten = 4-year-old child
6-month-old kitten = 10 human years old
8-month-old kitten = 15-year-old human
A 1-year-old cat has reached adulthood, the equivalent of 18 human years
2 human years = 24 cat years
4 human years = 35 cat years
6 human years = 42 cat years
8 human years = 50 cat years
10 human years = 60 cat years
12 human years = 70 cat years
14 human years = 80 cat years
16 human years = 84 cat years
So you can see that there are various ideas on the subject.
A few interesting facts: the longest-living cat was 34 years old according to some sources. The Siamese and the Manx breeds are the longest-living cats on average. And keeping your cat indoors typically doubles its lifespan!
Here is the calculator...
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