First, you enter your age. Then your gender, or the gender you were born with. Then, your current weight in either kilograms or pounds. After that, you choose how many times you exercise or work out in a week. Continuing on, you write down how tall you are, then press the calculate button. Then you get your answer.
I'm sorry I couldn't help properly, but it does depend on YOUR self, so it wouldn't count if you used my numbers. Good luck!