The life expectancy

Life expectancy

Life expectancy is the expected number of years of life remaining at a given age. It is denoted by ex, which means the average number of subsequent years of life for someone now aged x, according to a particular mortality experience...

 of a cat

Cat

The cat , also known as the domestic cat or housecat to distinguish it from other felids and felines, is a small, usually furry, domesticated, carnivorous mammal that is valued by humans for its companionship and for its ability to hunt vermin and household pests...

 is typically 12-15 years. However, a cat kept indoors may live to at least 21 years. This compares to a world average for humans of 67.2 years. A one-year-old cat may be compared to a 15-year-old-human. This proportion narrows as the cat gets older so that when the cat is 15 it is equivalent to a 76-year-old person.

Cat Years	Human Years
1	15
2	24
3	28
4	32
5	36
6	40
7	44
8	48
9	52
10	56
11	60
12	64
13	68
14	72
15	76
16	80
17	84
18	88
19	92
20	96