how much is 1cc in mg? May 27, 2022 by Anirban Confused About Dosage Amounts? (Testosterone Replacement Therapy) mg is milligrams, cc is cubic centimeters. For water 1 cc = 1 g = 1000 mg. How to Read a Syringe 3 ml, 1 ml, Insulin, & 5 ml/cc | Reading a Syringe Plunger