Table 3.

Average daily balance for water in an adult human in a temperate climate, using the urinary output of medical and graduate students as determined in a teaching laboratory exercise

SubstanceInputOutput
DietaryMetabolicUrinaryFecalInsensible
Water
 as fluid1,2203-150 3001,5203-151 100900
 in food1,000
Total2,5202,520
  • Values are in ml/day. Table adapted from Valtin and Schafer (92).

  • F3-150 Calculated from total estimated output.

  • F3-151 Mean of 24-h collections from 69 students.