Yes there is indeed a drop down calculator for use during the NCLEX. I had two questions involving calculations. I had 75 questions and I passed, so don't be too concerned that you are doing poorly if you get a question that involves using the calculator. If I were you I would just focus on the question in front of you and not how hard or easy it is. P.S. I took the Kaplan review and it was a complete waste of money.