The average lifespan of a cat living inside is on top of that of a cat on the road, albeit that cat is merely on the road a part of the time. the common lifespan of a cat has hyperbolic dramatically within the past twenty years as veterinary care has become additional subtle. the common life for a strictly indoor cat is twelve to fifteen years. several life to be abundant longer; the oldest cat on record died at the age of “38 years and three days,” in line with the Guinness Book of World Records. A strictly out of doors cat lives but 5 years, ANd an indoor/outdoor cat averages somewhere around eight years.