This will tell you the amount of protein you need to maintain your muscle, bone and organs (i.e. your lean body mass). If you are trying a ketogenic diet, start at the lower end. If you are trying to build muscle you may need to start at the max instead.
If you have a measuring tape, you can estimate your body fat percentage from your measurements. It is more accurate. Otherwise, you can estimate your body fat percentage from your BMI.Calculate from my measurements
Your BMI is X with an estimated Y% of body fat.
Your estimated body fat is X%.
Your lean body mass is X pounds. You may need between Y to Z grams of protein a day.