14 is the mew 72

From vetstreet.com, so that Pekoe gets enough candles every January.

How Old Is My Cat?

We all love easy answers, so after the idea of "dog years" became popular, we started seeing the same methodology applied to cats: Take the lifespan of a cat, compare it to a person, then get your formula, which is why you may frequently hear that 1 cat year equals 4 human years.

You’re ahead of me already, I bet: A 1-year-old cat is far more mature than a 4-year-old child, and a 2-year-old cat is fully mature, which can never be said of a human 8-year-old.

Because cats have less size diversity than dogs do, however, in this case we actually can make the formula work, if we start calculating at a cat's second birthday. The first year takes a cat to late adolescence, and the second into young adulthood. You can then start counting in fours: Figure a 2-year-old cat at 24 "human years." and add four years for every one thereafter, making a 4-year-old cat the equivalent of a 32-year-old person. That makes a 9-year-old cat about 52 in human terms, and 16-year-old cat about 80.