9 grams is how many milligrams? Prealgebra Ratios, Proportions, Units and Rates Unit Conversions 1 Answer LM Mar 8, 2018 #9000mg# Explanation: #1# milligram #= 1/1000# grams the prefix 'milli-' means #1/1000# of a quantity. #1# gram #= 1000# milligrams #9# grams #= 9 * 1000# milligrams #= 9000# milligrams Answer link Related questions How do you convert 73 mi/h = ____km/s? Every morning for breakfast, Mika drinks 20 cL of orange juice. How many milliliters of orange... David takes 300 milligrams of medicine every day. How many grams is this? A manufacturer ships its product in boxes with edges of 4 inches. If 12 boxes are put in a... How many feet is 15 miles? How many feet in a mile? How many meters in a mile? How many feet are in .55 miles? How many miles are in 100 feet? How do you find out how many feet are in a mile? See all questions in Unit Conversions Impact of this question 9103 views around the world You can reuse this answer Creative Commons License