Total Body Water: Watson Formula
Total body water can be estimated using the following formulas (Watson PE, Watson ID, Batt RD. American Journal of Clinical Nutrition. 1980;33(1):27-39).
For males
TBW = 2.447 − 0.09516 × age + 0.1074 × height + 0.3362 × weight
- TBW (total body water) in litres
- Age in years
- Height in cm
- Weight in kg
For females
TBW = −2.097 + 0.1069 × height + 0.2466 × weight
- TBW (total body water) in litres
- Height in cm
- Weight in kg