A guinea pig can live up to 9 to 10 years. Guinea pigs live an average of five to seven years, according to the University of Pennsylvania's Penn Veterinary Medicine. Average means some guinea pigs live longer lives and some live shorter lives. For example, the University of Michigan's Museum of Zoology points out that guinea pigs can live up to 14 years.
Which type of guinea pig you have at home determines how long he can live. Hairless guinea pigs, for example, have a higher life span average seven to eight years than other types. Long-haired guinea pigs, on the other hand, live less, with average life spans of five to six years.