1. What is Flow Rate mL/hr Calculator?

Definition: This calculator determines the intravenous (IV) flow rate in milliliters per hour (mL/h) based on the total volume to be infused and the time duration.

Purpose: It helps medical professionals and caregivers accurately calculate IV medication or fluid administration rates.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Q_{mL} \) — Flow rate (milliliters per hour)
• \( V_d \) — Total volume to be infused (milliliters)
• \( t \) — Time duration (hours)

Explanation: The total volume is divided by the infusion time to determine the hourly rate.

3. Importance of Accurate Flow Rate Calculation

Details: Proper flow rate calculation ensures patient safety, correct medication dosing, and prevents complications from too rapid or slow infusions.

4. Using the Calculator

Tips: Enter the total volume in milliliters and the infusion time in hours. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's a typical flow rate range?
A: Common rates range from 20-125 mL/h for adults, but always follow specific orders for each patient.

Q2: How do I calculate for minutes instead of hours?
A: Convert minutes to hours (divide by 60) before entering the time value.

Q3: What if I need drops per minute (gtts/min)?
A: First calculate mL/h, then use the drop factor (gtts/mL) to convert: (mL/h × drop factor) ÷ 60.

Q4: Why is precise flow rate important?
A: Critical medications require exact dosing; incorrect rates can lead to under/over medication or fluid overload.

Q5: How often should flow rates be checked?
A: Hospital protocols typically require hourly checks for critical infusions.