Mass is measured in grams and kilograms. A gram is very light, about as light as a paperclip. A kilogram is 2.2 lbs, so it is more useful for everyday objects. Things such as people, furniture, cars, etc. could be measured in kilograms while objects like paper, small amounts of gold, or mail could be measured in grams. 1 kilogram is equal to 1000 grams.