# How many fish years equals a human year?

It takes 16 fish years to equal one human year. The life expectancy of most fish tends to be very short.

### How many cat years equals a human year?

Commonly people use 1 human years = 5 cat year, so a 20 year old cat would be 100 in cat years. However Cats and Humans mature at different ages relatively, so each cat year isn't equals to the same number of human years and visa versa. This online tool does all the calculation for you to Convert between Cat and Human years taking in to consideration the ages in which each matures: http://www.utilitiesman.com/fun/animals/cat-years