Pediatric Maintenance Fluid Calculator (Holliday-Segar)
Calculates daily and hourly maintenance intravenous fluid requirements for children using the Holliday-Segar method.
Current body weight in kilograms
Common pediatric maintenance fluid compositions
⚠️ Warnings & Contraindications
- This is for maintenance fluids only; deficit and replacement fluids must be calculated separately
- Recent evidence suggests hospitalized children may need higher sodium (approximately 3-5 mEq/100mL)
- Fluid restriction may be needed in SIADH, CHF, or renal failure
- Monitor electrolytes regularly during IV fluid therapy
- The 4-2-1 rule is the simplified hourly equivalent: 4 mL/kg/hr for 0-10 kg, 2 mL/kg/hr for 10-20 kg, 1 mL/kg/hr for >20 kg
ℹ️ Clinical Notes
Simplified hourly rate (4-2-1 rule): 4 mL/kg/hr (0-10 kg), 2 mL/kg/hr (10-20 kg), 1 mL/kg/hr (>20 kg). Maximum adult rate approximates 60-80 mL/hr.
References
- Holliday-Segar Method for Calculating Maintenance Fluid Requirements - Pediatric Fluid and Electrolyte Therapy - NIH/PMC (2012)
- The maintenance need for water in parenteral fluid therapy - Pediatrics (1957)
Medical Disclaimer
This calculator is provided for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or calculated using this tool.
The authors and publishers of this calculator make no representations or warranties of any kind, express or implied, about the completeness, accuracy, reliability, suitability, or availability of the information, products, services, or related graphics contained within this tool for any purpose.