Question: 1 2 gram equals how many mg?
Answer: Grams to Milligrams Conversion 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. What is a Gram? Gram is a metric system mass unit. 1 g = 1000 mg.