Conventional Units SI Units
Sodium 30–280 mEq/day 30–280 mmol/day
Chloride 110–250 mEq/day 110–250 mmol/day
Potassium 40–80 mEq/day 40–80 mmol/day
Calcium Male: <275 mg/day Male: <6.8 mmol/day;
Female: <250 mg/day Female: <6.2mmol/day
Phosphorus 0.9–1.3 g/day 29–42 mmol/day
Magnesium <150 mg/day 3–4.3 mmol/day
. 24-hour urine collection
■ Provides information about hydration status, the kidneys’ ability
to conserve or excrete sodium.
■ Calcium levels are increased in hyperthyroidism, immobilization,
multiple myeloma, Paget’s disease, and bone metastases.
