How much should an adult cat wight?

An adult cat weighs about 10 to 12 pounds. Weight is a force, rather than a mass; so in order to find his mass we would have to change units. In the FPS system there is no convenient unit of mass, so the simplest way to determine this is to convert to kilograms, which are a mass unit. An object that weighs 11 pounds on Earth's surface has a mass of 5 kilograms.