What is the half of 1.6? Is 1.6 a decimal? Or a fraction? If so, how much is half a kilogram? If half a kilogram is one gram, then the answer is 0.64 g. In other words, half a kilogram is one pound. It also means that Andre lives 1.6 km away from the school. If half a kilogram is one pound, then half a kilogram is one pound.