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.

Read more about your body's protein requirements

References

• The recommended amount of protein is based on 0.6-1 g of protein per 1 lb of lean body mass as recommended by The Art and Science of Low Carbohydrate Performance.
• I am using the U.S. Navy circumference method to determine body fat from body measurements.
• The formula used to estimate body fat from BMI is from The effect of sex, age and race on estimating percentage body fat from body mass index: the Heritage Family Study.