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Total body water can be estimated using the following classic formulae:
For males
Total Body Water (TBW) = 2.447 - 0.09156 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
References
Watson PE, Watson ID, Batt RD.
Total body water volumes for adult males and females estimated from simple anthropometric measurements.
Am J Clin Nutr. 1980 Jan;33(1):27-39.
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