According to that formula, patients require Sodium: 3 mEq/100 kcal/24 hours (3 mEq/100 mL/24 hours) Potassium: 2 mEq/100 kcal/24 hours (2 mEq/100 mL/24 hours) (NOTE: 2 to 3 mEq/100 mL is equivalent to 20 to 30 mEq / L [20 to 30 mmol / L].)