IV Infusion Flow Rate Calculator (mL/hour)
Calculates infusion pump rate in mL/hr from total infusion volume (mL) and duration (hours or minutes).
⚠️ Educational Calculation & Clinical Safety Safeguard: Monitor fluid balance and cardiopulmonary status in heart failure, renal impairment, and paediatric patients. Educational calculations do not replace clinician assessment, patient-specific laboratory monitoring, or institutional prescribing protocols.
Interactive Calculator
Allowed physiological/compounding range: 1 to 10000 mL
Allowed physiological/compounding range: 0.08 to 168 hours
Calculated Output (mL/hr)
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Step-by-Step Mathematical Derivation & Explanation:
Validated Formula & Conversion Rules
Infusion Rate (mL/hr) = Total Volume (mL) / Infusion Time (hours)Worked Clinical Example
1000 mL Normal Saline over 8 hours: Rate = 1000 / 8 = 125.0 mL/hr.
Rounding Rules, Assumptions & Source References
- Rounding Rule: Round standard volumetric infusion pump settings to nearest whole mL/hr (or 0.1 mL/hr for syringe pumps).
- Clinical Assumptions & Limitations: Validated only within the stated physiological input boundaries. For paediatric, renal (Cockcroft-Gault), and critical-care infusion calculations, always cross-check against official product labelling and institutional guidelines.
- Source References: Indian Pharmacopoeia (IP 2022), National Formulary of India (NFI), British National Formulary (BNF), and NCBI Bookshelf Clinical Pharmacology Compendia.