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Total Body Weight (TBW) Deficit Calculation

TBW Deficit Calculator is used to calculate the total body weight in terms of litres. Enter sodium in mmol/L and weight to get the calculated result.

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Total Body Weight (TBW) Deficit Calculator

Sodium (mmol/L)
Weight  
Body Water Deficit in L =

 
   
  
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Formula:

Body Water Deficit (in liters) = ( 0.6 * Wt * [(Na/140) - 1] )

 Where,
Wt = current weight in kg
Na = measured serum Na in mmol/L
(Assumes Total Body Water is 60% of current body weight; may be less in female or cachectic patients)

TBW deficit to calculate weight is made easier. Free Online Engineering Calculator .