Question: is g the same as cm3?
Answer: Conversion Table. 1 gram (g) = weight of 1 cubic centimeter (cc, cm3) of pure water at temperature 4 °C = 1000 milligrams (mg) = 0.001 kilogram (kg). 1 cubic centimeter (cc, cm3) = 1 ml (milliliter) = 0.0338140227 US fluid ounces (fl. oz) = 1/1000 L (Liter, the official SI unit of volume).