Free Practice Questions Here: Check out for written explanations! Best NCLEX Resources: Saunders Comprehensive Review for the NCLEX-RN Examination Canada: USA: 6,000+ NCLEX Practice Questions Canada: USA: NCLEX Board Game for Studying Canada: USA: This tutorial shows you the easiest way to calculate an IV drip rate. Using this 3 step formula, if you use the correct units in each step, you will get the right answer every time. If you have any questions feel free to comment below. Remember: Flow rate = ml/hour (varies depending on question) Drop factor = gtt/ml (varies depending on question) Time conversion = 1 hour/60 minutes (always the same for this method) Prerequisite: How to calculate flow rates: