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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. By comparison, the average life expectancy of humans at birth is 67.2 years. 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.
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 years||Equivalent human age|
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).