I’m bigger than this study‘s mean weight of 76.4kg (168lb) and taller than the mean height of 173cm (5 1/2 ft). In that study, the mean weight of the liver was 1561g (3.4lbs). Considering I’m bigger than the average and I have organomegaly, my liver could be around 4lbs. According to WikiAnswers, that’s similar to a solid metal hammer or cast iron skillet.