Paediatrics · ICU and Critical Care · Anaesthesiology
Maintenance Intravenous Fluids (4-2-1 Rule) calculator
Enter the published formula inputs below to calculate and interpret this score.
Clinical inputs
lb
Allowed range: 2.2–440.92 lb
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Clinical inputs
- Body weight (kg)Accepted range: 1 to 200
Primary source
Holliday MA, Segar WE. The maintenance need for water in parenteral fluid therapy. Pediatrics. DOI: 10.1542/peds.19.5.823. PMID: 13431307. Scope: 24-hour maintenance fluid rate (mL/day) using the 4-2-1 rule: 100 mL/kg for the first 10 kg, 50 mL/kg for the next 10 kg, and 20 mL/kg for each additional kg. (1957)
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