There is 0.001 kilogram in one gram. Conversely, there are 1,000 grams in one kilogram. The prefix "kilo" comes from the Greek word "khilioi," meaning "one thousand."
The weight of one kilogram, or 1,000 grams, is equal to approximately 2.2 pounds. This means that one gram is equal to 0.0022 pounds.
The basic unit of mass for the International System of Units is the kilogram. The expression of weight, however, can be scaled through the various metric prefixes. Thus, an object that weighs one gram is not reasonably expressed as 0.001 kilograms. Additionally, an object that weighs a tenth of a gram can be more easily expressed as one decigram.