Common Weight and Mass Conversions. Welcome to OnlineConversion.com Common Weight and Mass Conversions The kilogram or kilogramme (SI unit symbol: kg), is the base unit of mass in the International System of Units (SI) (the Metric system) and is defined as being equal. ››More information from the unit converter. How many gram in 1 mg? The answer is 0.001. We assume you are converting between gram and milligram. You can view more. ››Measurement unit: megagram. Full name: megagram. Plural form: megagrams. Symbol: Mg. Category type: weight. Scale factor: 1000 ›› SI unit: kilogram. The SI. M M [1] an informal abbreviation for million in expressions such as $500M for 500 million dollars or Unemployment Reaches 4M in a newspaper headline. To help compare different orders of magnitude, the following lists describe various mass levels between 10 −40 kg and 10 52 kg. Appendix E. General Tables of Units of Measurement 143 Appendix E. General Tables of Units of Measurement These tables have been prepared for the benefit of those. References. Texas A&M University: The Metric System; Yale University; Making Measurement Simple: The Metric System; Eric Carlson; 2011; Colorado State University. Pharmaceutical calculations. helpful in various competitive examinations for Pharmacy graduates. Overview. Mass is a measure of the resistance of the object to acceleration. It is an inherent property of the object, contrast to weight, which depends on the.