Question: 500 mg is half a gram?
Answer: Grams to Milligrams Conversion There are 1000 milligrams in a gram. To convert grams to milligrams, multiply the gram value by 1000. For example, to find out how many milligrams there are in a gram and a half, multiply 1.5 by 1000, that makes 1500 milligrams in a gram and a half.