how many units in a ml? May 2, 2022 by Anirban Share via: Facebook Twitter LinkedIn Mix More U-100 Insulin Dosage Calculation (Two Examples) The U-100 means there are 100 units in 1 milliliter. How to Read a Syringe 3 ml, 1 ml, Insulin, & 5 ml/cc | Reading a Syringe Plunger Share via: Facebook Twitter LinkedIn Mix More