Cat years

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The life expectancy of a cat is typically 12–15 years. However, some cats may attain the age of 21 years or more.[1] By comparison, the average life expectancy of humans at birth is 67.2 years.[2] A one-year-old cat is roughly comparable, in developmental terms, to a 20-year-old-human. Subsequent years of a cat's life add progressively fewer years to its human age equivalent, so that a 15-year old cat is roughly comparable, developmentally, to a 76-year-old human.[3]

The table below shows the correspondence between a cat's chronological age and the age of a human at a comparable stage of development.

Calendar yearsEquivalent human age
120
224
328
432
536
640
744
848
952
1056
1160
1264
1368
1472
1576
1680
1784
1888
1992
2096
21100
22104
23108
24112
25116

The oldest cat ever recorded was Creme Puff, who died in 2005, having attained the age of 38 years, 3 days (equivalent to the human age of 168 years).

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