Hospital Medicine
Adult Daily Maintenance Fluid & Electrolyte Requirement Calculator
Calculates 24-hour maintenance water, sodium, potassium, and hourly IV infusion rate based on NICE guidelines.
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Parameters
Adult Daily Maintenance Fluid & Electrolyte Requirement Calculator Result
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Formula
NICE Maintenance = 25–30 mL/kg/day H₂O + 1 mmol/kg/day Na⁺ + 1 mmol/kg/day K⁺ + 50–100g Glucose
Hourly Rate (mL/hr) = 24-Hour Total Volume / 24 hoursClinical Pearls
Provides the evidence-based cornerstone for hospital inpatient NPO fluid orders, preventing both hypovolemic dehydration and iatrogenic hypervolemic pulmonary edema.
Limitations
Designed strictly for routine maintenance. Patients in septic shock or acute hemorrhagic shock require rapid bolus resuscitation with balanced crystalloids (Plasma-Lyte or Lactated Ringer's).