Total Body Water Calculator
Worked example result
| Total body water | 45.9 L |
| Body water as share of weight | 57.4% |
A 30-year-old man at 180 cm and 80 kg has an estimated total body water of about 45.9 litres — roughly 57.4% of his body weight.
Men: TBW (L) = 2.447 − 0.09156 × age + 0.1074 × height (cm) + 0.3362 × weight (kg) · Women: TBW (L) = −2.097 + 0.1069 × height (cm) + 0.2466 × weight (kg) (Watson, 1980) · Powered by CalcHub — Total Body Water Calculator