The setup
Volume (mL) ÷ Time (hr) = mL/hr
If time is in minutes, divide by 60 first.
100 mL over 30 min: 30 ÷ 60 = 0.5 hr; 100 ÷ 0.5 = 200 mL/hr
Common mistakes
- Dividing by minutes when the answer is per hour.
- Dividing time by volume.
IV Flow Rate Practice
Practice volume ÷ time to find a pump rate in mL/hr.
Practice question
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Educational Use & Safety
Educational practice only. These exercises teach medication math and do not determine an appropriate medication, dose, infusion rate, or treatment for an actual patient.
Educational Use & SafetyNeed a calculator instead? Open the IV Flow Rate Calculator