Total body water in an 80 kg adult with a TBW fraction of 0.6 is approximately how many liters?

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Multiple Choice

Total body water in an 80 kg adult with a TBW fraction of 0.6 is approximately how many liters?

Explanation:
Total body water is a portion of body weight, expressed as a fraction. If the TBW fraction is 0.6, that means about 60% of body weight is water. To convert to liters, use that 1 kilogram of water roughly equals 1 liter. For an 80 kg adult: 0.6 × 80 kg = 48 kg, which is about 48 liters of water. In adults, TBW is typically about 60% of body weight, with intracellular fluid and extracellular fluid making up that total, though the exact amount can vary with age, sex, and body composition.

Total body water is a portion of body weight, expressed as a fraction. If the TBW fraction is 0.6, that means about 60% of body weight is water. To convert to liters, use that 1 kilogram of water roughly equals 1 liter. For an 80 kg adult: 0.6 × 80 kg = 48 kg, which is about 48 liters of water. In adults, TBW is typically about 60% of body weight, with intracellular fluid and extracellular fluid making up that total, though the exact amount can vary with age, sex, and body composition.

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