Paediatric Maintenance Fluid Calculator
Calculate hourly and daily maintenance fluid requirements for children using the Holiday-Segar (4-2-1) rule.
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Formula
The 4-2-1 rule is the clinical standard for calculating the baseline fluid needs of a paediatric patient.
Worked Example
Frequently Asked Questions
What is the 4-2-1 rule?
It is a method to calculate hourly fluid rates: 4 mL/kg for the first 10kg of weight, 2 mL/kg for the next 10kg, and 1 mL/kg for every kg thereafter.
Does this include replacement?
No. This only calculates "maintenance" (baseline) needs. Additional fluids may be needed for dehydration or ongoing losses.
Is it the same for daily totals?
Yes. The equivalent "100-50-20" rule calculates the total volume for 24 hours.
Medical Disclaimer
This calculator is provided for informational and educational purposes only. It is not intended as a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making any decisions based on these results. Do not disregard or delay seeking medical advice because of information obtained from this tool.
AI Assistant
Ask about this calculator
I can help you understand the paediatric maintenance fluid calculator formula, interpret your results, and answer follow-up questions.
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Our AI assistant provides general estimates and advice only. Please consult a qualified healthcare professional before making any health-related decisions.
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