You will need a calculator to carry out calculations during the PMP exam. However, to maintain exam integrity, you cannot bring your calculator with you, and hence you must memorize all the formulas thoroughly.
But there are a few complex calculations, and a calculator is required. So, the only option is to use the Microsoft Windows calculator.
Though there are other aspects that you must be familiar with, here I will only focus on why you must get familiar with the Windows calculator.
Now that you know you are not allowed your calculator in the exam room start practicing working with the Windows calculator. Make practicing solving questions with it a part of your study routine.
And one more recommendation, to become pro at using it, start using it even for the fundamental calculations, like 2 multiplied by 20 and so on.
Why am I asking you to do calculations like these with the calculator? The reason is straightforward.
There is a lot of stress involved during the exam. And under pressure, you might commit silly mistakes. To avoid such incidents, hands-on practice using the calculator before the exam is necessary.
PMP certification exam is crucial for your future, and your career depends on its success. So, it is evident that a lot of stress is involved during the preparation and exam day.
So, having awareness about using different tools like a whiteboard and Windows calculator will reduce the pressure as you do not have to waste time getting familiar with them during the exam.