MedCalc: Total Body Water / Urea Volume of Distribution

Height : Weight : Age : cm meters inches feet kilograms pounds years female male no yes Total Body of Water Watson formula Hume-Weyer formula Bioelectrical impedance Mellits-Cheek formula (kids) 0.6 x weight : liters

Watson : Hume-Weyers : Chertow's Bioelectrical Impedance: Male TBW = 2.447 - (0.09156 x age) + (0.1074 x height) + (0.3362 x weight) Female TBW = -2.097 + (0.1069 x height) + (0.2466 x weight) Male TBW = (0.194786 x height) + (0.296785 x weight) - 14.012934 Female TBW = (0.34454 x height) + (0.183809 x weight) - 35.270121 TBW = ht x (0.0186104 x wt + 0.12703384) + wt x (0.11262857 x male + 0.00104135 x age - 0.00067247 x wt - 0.04012056) - age x (0.03486146 x male + 0.07493713) - male x 1.01767992 + diabetes x 0.57894981 Boys TBW = -1.927 + 0.465 x weight + 0.045 x height, for height < 132.7 cm = -21.993 + 0.406 x weight + 0.209 x height, for height > 132.7 cm Girls TBW = 0.076 + 0.507 x weight + 0.013 x height, for height < 110.8 cm = -10.313 + 0.252 x weight + 0.154 x height, for height > 110.8 cm Hume R, Weyers E. Relationship between total body water and surface area in normal and obese subjects. J Clin Pathol 24:234-238, 1971. Watson PE, Watson ID, Batt RD. Total body water volumes for adult males and females estimated from simple anthropometric measurements. Am J Clin Nutr 33:27-39, 1980. Chertow GM, Lowrie EG, Lew NL, Lazarus JM. Development of a population-specific regression equation to estimate total body water in hemodialysis patients. Kid Int 51:1578-1582, 1997.

Created: Monday, November 5, 2001