Clinical use
Use this calculator for maintenance iv fluid rate using 4-2-1 rule in thedrug dosing workflow. It is decision support and should be interpreted with the patient context, local protocols, and clinician judgment.
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Maintenance IV Fluids (Holliday-Segar) Calculator
Maintenance IV fluid rate using 4-2-1 rule
Calculate IV Fluids
Interpretation
4-2-1 rule: 4 mL/kg/h for first 10 kg, 2 mL/kg/h for next 10 kg, 1 mL/kg/h thereafter. Baseline maintenance only — add replacement for ongoing losses.
Required inputs
- Weight
Evidence and limitations
This page cites 1 published reference. Confirm units and inclusion criteria before applying the output; calculators do not replace assessment, escalation, or local policy.
References
- Holliday MA, Segar WE. Pediatrics 1957;19:823-832
Frequently asked questions
What is the Maintenance IV Fluids (Holliday-Segar)?
Maintenance IV Fluids (Holliday-Segar) is a clinical calculator used for Maintenance IV fluid rate using 4-2-1 rule.
How do I interpret the Maintenance IV Fluids (Holliday-Segar)?
4-2-1 rule: 4 mL/kg/h for first 10 kg, 2 mL/kg/h for next 10 kg, 1 mL/kg/h thereafter. Baseline maintenance only — add replacement for ongoing losses.
What inputs are required for the Maintenance IV Fluids (Holliday-Segar)?
Required inputs include Weight.
What is the evidence behind the Maintenance IV Fluids (Holliday-Segar)?
The Maintenance IV Fluids (Holliday-Segar) page cites Holliday MA, Segar WE. Pediatrics 1957;19:823-832.
Next steps
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