The life expectancy of a cat is typically 15-17 years. However, a cat kept indoors may live to upwards and, at times, over 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|
The oldest cat ever recorded was Creme Puff, who died in 2005 at 38 years, 3 days old.
... The ages of domestic cats and dogs are often referred to in terms of "cat years" or "dog years", representing a conversion to human-equivalent years ... One formula for cat years is based on a cat reaching maturity in approximately 1 year, which could be seen as 16 in human terms, then adding about 4 years for every year ... A 5-year-old cat would then be (5 − 1) × 4 + 16 = 32 "cat years" (i.e ...
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