Calculate the age of your cat in human years

Nowadays cats tend to live longer - the average life-span of  a 21^stcentury cat is estimated at between 10-15 years. There are many contributing factors, including better diet, care and medical advances. Cats mature very early. After one year they are fully developed and have reached sexual maturity. So you could say that the childhood of a cat is very short when compared to humans. Indeed the first two years of a cat's life is when the relative age difference between humans and cats is geatest.
Using the form below you can compare your cat's age to relative human years. Remember that this conversion is only an approximation; but it is a useful tool to help you understand the physiological changes which your cat undergoes as she ages.



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:

• 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 to calculate their age: