How do you calculate total body water?

Total body water (TBW) can be estimated using several methods, with the most common being the use of body weight and specific population averages. Generally, TBW is approximately 60% of body weight in males and 50-55% in females. For a more precise measurement, techniques such as bioelectrical impedance analysis or dilution methods using isotopes can be employed. These methods account for factors like age, sex, and body composition for a more accurate assessment.