For healthcare professionals
IV Flow & Drip Rate Calculator
mL/hour and drops/minute from volume, time and the giving set's drop factor.
Infusion Duration Calculator
How long a volume takes to run at a given rate.
For healthcare professionals / clinical use. Not a self-diagnosis tool.
Your result will appear here
Enter your measurements, then press Calculate.
Methodology
Duration arithmetic
hours = volume ÷ rate
Simple time calculation for a constant rate.
- Who it is for
- Any infusion at a fixed rate.
- Version
- 1.0.0
Worked example: how to calculate infusion duration
Inputs
- Volume
- 500 mL
- Rate
- 125 mL/h
Result
- Duration
- 4 hours
- Duration
- 240 minutes
Calculation:
500/125 = 4
An illustration with sample values, worked out with the same method the tool above uses.
Limitations
- Arithmetic aid only: always follow the prescription, local protocol and smart-pump drug library, and have high-risk infusions independently double-checked.
References
- Olsen JL, Giangrasso AP, Shrimpton DM. Medical Dosage Calculations. 12th ed. Hoboken, NJ: Pearson; 2020.
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