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)

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For males

Total Body Water (TBW) = 2.447 - 0.09516 X age + 0.1074 X height + 0.3362 X weight

• Water in Litres

• Age in years

• Height in cm

• Weight in kg

 

For females

TBW = -2.097 + 0.1069 X height + 0.2466 X weight

• Water in Litres

• Height in cm

• Weight in kg