IV Drip Rate Formula: Calculation Practice Quiz!

Clinically Reviewed by Nicolette Natale
Nicolette Natale, DO (Medicine) |
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Nicolette Natale is a dedicated healthcare professional with a diverse background in medicine and education. She holds a Doctor of Osteopathic Medicine degree from Nova Southeastern University, as well as Bachelor's degrees in English Literature and Psychology from the University of Miami. With over 6 years of experience, Nicolette is a physician, research coordinator, and medical writer who is committed to advancing medical research and providing quality patient care.
 , DO (Medicine)
By Marie Fox
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Marie Fox
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  • 1/15 Questions

    Find the flow rate in mL per hour. 1500 mL RL over 12 hours.

    • 83
    • 94
    • 100
    • 125
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About This Quiz


Are you ready to test your knowledge in the world of IV computation? This "IVF Computation Quiz" is designed for nursing students, healthcare professionals, or anyone interested in honing their skills in drip rate calculations and IVF (intravenous fluid) management.

With this drip rate practice questions quiz, you will encounter a variety of questions that cover essential concepts, including calculating flow rates, determining infusion times, and converting measurements. Each question aims to reinforce your understanding and application of IV computations, ensuring that you are well-prepared for real-world scenarios in medical settings.

IV Drip Rate Formula: Calculation Practice Quiz! - Quiz

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  • 2. 

    Find the flow rate in mL per hour. 300 mL NS over 2 H.

    • 150 mL

    • 200 mL

    • 300 mL

    • 600 Ml

    Correct Answer
    A. 150 mL
    Explanation
    The flow rate for 300mL NS over 2 hours is 150 mL per hour.Here's the calculation:Total volume: We have 300 mL of NS solution.Time: The solution needs to be infused over 2 hours.Now, applying the formula:Flow rate (mL/hour) = Total volume (mL) / Time (hours)Flow rate = 300 mL / 2 hours = 150 mL/hourTherefore, the correct answer is 150 mL.

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  • 3. 

    Find the flow rate in mL per hour. 3000 mL 0.45% over 24 H.

    • 75 mL

    • 200 mL

    • 125 mL

    • 150 mL

    Correct Answer
    A. 125 mL
    Explanation
    To find the flow rate for 3000 mL over 24 hours, use the formula:Flow rate (mL/hour) = Total volume (mL) / Time (hours)Here, the total volume is 3000 mL, and the time is 24 hours.Calculating it gives:Flow rate = 3000 mL / 24 hours = 125 mL/hourThis means that if you infuse 3000 mL over a full day (24 hours), you will need to deliver 125 mL every hour. Therefore, the correct answer is 125 mL.

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  • 4. 

    Find the flow rate in mL per hour. 750 mL NS over 8 hours.

    • 83

    • 93.75

    • 100

    • 125

    Correct Answer
    A. 93.75
    Explanation
    The flow rate is 93.75 mL per hour.Here's how we can calculate it:Convert the total volume to mL/hour: We know the total volume is 750 mL and the infusion time is 8 hours. To find the hourly rate, we simply divide the volume by the time: 750 mL / 8 hours = 93.75 mL/hour.Therefore, the correct answer is 93.75.

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  • 5. 

    Ordered: 500 mL 5% Dextrose 0.45% NS over 3 hours. Find the flow rate per hour.

    • 125 mL

    • 167 mL

    • 250 mL

    • 500 mL

    Correct Answer
    A. 167 mL
    Explanation
    To find the flow rate per hour for the IV infusion:Total Volume: 500 mLTotal Time: 3 hoursCalculate Flow Rate (mL/hour): Flow Rate = Total Volume / Total TimeFlow Rate = 500 mL / 3 hours = 166.67 mL/hourRound to the nearest whole number: Flow Rate ≈ 167 mL/hourFinal answer: 167 mL/hour.

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  • 6. 

    Ordered: 1000 mL LR over 6 hours.  Find the flow rate in mL per hour.

    • 17 mL

    • 167 mL

    • 175 mL

    • 217 mL

    Correct Answer
    A. 167 mL
    Explanation
    The correct flow rate for 1000 mL LR over 6 hours is 167 mL per hour. Here's the calculation:Total volume: We have 1000 mL of LR solution.Time: The solution needs to be infused over 6 hours.Now, applying the formula:Flow rate (mL/hour) = Total volume (mL) / Time (hours)Flow rate = 1000 mL / 6 hours = 166.67 mL/hour (rounded to two decimal places)Therefore, the flow rate is 167 mL per hour, matching option B.

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  • 7. 

    Find the flow rate in mL per hour. 1000 mL NS over 12 hours.

    • 83

    • 94

    • 100

    • 125

    Correct Answer
    A. 83
    Explanation
    The flow rate for 1000 mL of Normal Saline (NS) over 12 hours is 83 mL per hour. Here's the calculation:Total volume: We have 1000 mL of NS solution.Time: The solution needs to be infused over 12 hours.Using the formula:Flow rate (mL/hour) = Total volume (mL) / Time (hours)Flow rate = 1000 mL / 12 hours = 83.33 mL/hour (rounded to two decimal places)Therefore, the correct answer is A. 83.

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  • 8. 

    Which of the following formulas is used to calculate the IV drip rate in drops per minute (gtts/min)?

    • (Total volume (mL) x Drop factor (gtts/mL)) / Time in hours

    • (Total volume (mL) / Time in minutes) x Drop factor (gtts/mL) 

    • (Total volume (mL) x Time in minutes) / Drop factor (gtts/mL) 

    • (Drop factor (gtts/mL) / Total volume (mL)) x Time in hours

    Correct Answer
    A. (Total volume (mL) / Time in minutes) x Drop factor (gtts/mL) 
    Explanation
    The formula calculates the IV drip rate, essential for administering intravenous fluids. It considers the total volume of fluid to be infused, the time over which it should be administered, and the drop factor of the IV tubing. The drop factor is a crucial variable that represents the number of drops required to deliver 1 mL of fluid, and it varies depending on the type of IV tubing used.

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  • 9. 

    Calculate the flow rate for manually regulated IV using the drops per minute. Ordered: 250 mL D5W over 3 hours. Tubing is 10 gtt/mL. Write the number only of the drops per minute.

    Correct Answer
    14
    Explanation
    To calculate the flow rate in drops per minute for the IV infusion:Convert time to minutes: Time = 3 hours × 60 min/hour = 180 minCalculate flow rate in mL/min: Flow rate (mL/min) = Total volume (mL) / Time (min) = 250 mL / 180 min ≈ 1.39 mL/minConvert to drops per minute: Flow rate (gtt/min) = Flow rate (mL/min) × Drop factor (gtt/mL) Flow rate (gtt/min) = 1.39 mL/min × 10 gtt/mL ≈ 13.89 gtt/minRound to nearest whole number: Flow rate = 14 gtt/minFinal answer: 14 gtt/min.

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  • 10. 

    Calculate the flow rate for manually regulated IV using the drops per minute. Ordered: 500 mL NS over 8 hours. Tubing is 15 gtt/mL. Write the number only of the drops per minute.

    Correct Answer
    16
    Explanation
    To calculate the flow rate in drops per minute for the IV infusion:Convert time to minutes: Time = 8 hours × 60 min/hour = 480 minCalculate flow rate in mL/min: Flow rate (mL/min) = Total volume (mL) / Time (min)Flow rate (mL/min) = 500 mL / 480 min ≈ 1.04 mL/minConvert to drops per minute: Flow rate (gtt/min) = Flow rate (mL/min) × Drop factor (gtt/mL)Flow rate (gtt/min) = 1.04 mL/min × 15 gtt/mL ≈ 15.6 gtt/minRound to nearest whole number: Flow rate = 16 gtt/minFinal answer: 16 gtt/min.

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  • 11. 

    Calculate the flow rate for manually regulated IV using the drops per minute. Ordered: 1500 mL 0.45% NS over 12 hours. Tubing is 15 gtt/mL. Write the number only of the drops per minute.

    Correct Answer
    31
    Explanation
    To calculate the flow rate in drops per minute for the IV infusion:Convert time to minutes: Time = 12 hours × 60 min/hour = 720 minCalculate flow rate in mL/min: Flow rate (mL/min) = Total volume (mL) / Time (min)Flow rate (mL/min) = 1500 mL / 720 min ≈ 2.08 mL/minConvert to drops per minute: Flow rate (gtt/min) = Flow rate (mL/min) × Drop factor (gtt/mL)Flow rate (gtt/min) = 2.08 mL/min × 15 gtt/mL ≈ 31.2 gtt/minRound to nearest whole number: Flow rate = 31 gtt/minFinal answer: 31 gtt/min.

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  • 12. 

    Ordered: 500 mg ampicillin in 100mL NS to infuse over 30 minutes. What is the flow rate per hour?

    • 20 mL

    • 50 mL

    • 100 ml

    • 200 mL

    Correct Answer
    A. 200 mL
    Explanation
    To calculate the flow rate per hour, we need to use the following formula:

    Flow rate (mL/hour) = Total volume (mL) / Time (hours)

    Here's how to apply it to this situation:


    Total volume: We have 100 mL of normal saline (NS) solution.
    Time: The solution needs to be infused over 30 minutes, which is 30 minutes / 60 minutes/hour = 0.5 hours.


    Now, plug these values into the formula:

    Flow rate (mL/hour) = 100 mL / 0.5 hours = 200 mL/hour

    Therefore, the flow rate per hour is 200 mL.

    So, the correct answer is 200 mL.

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  • 13. 

    Find the flow rate in mL per hour. 40 mEq KCL in 100 mL NS over 45 minutes.

    • 66 mL

    • 75 mL

    • 125 mL

    • 133 mL

    Correct Answer
    A. 133 mL
    Explanation
    To calculate the flow rate in milliliters per hour (mL/h) for an IV infusion, you can use the following formula:
    Flow Rate (mL/h) = (Volume to Infuse in mL) / Time in hours
    Given: Volume to infuse = 100 mL
    Time = 45 minutes, 1 hour = 60 minutes, so 45 minutes = 45/60 hours = 0.75 hours
    Flow Rate = 100 mL / 0.75 hours = 133.33 mL/h
    So, the flow rate for the IV infusion of 40 mEq of KCl in 100 mL of NS over 45 minutes is approximately 133.33 milliliters per hour.

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  • 14. 

    Calculate the flow rate for manually regulated IV using the drops per minute. Ordered: 1000 mL NS over 24 hours. Tubing is 20 gtt/mL. Write the number only of the drops per minute.

    Correct Answer
    14
    Explanation
    To calculate the flow rate in drops per minute for the IV infusion:

     

    Convert time to minutes: Time = 24 hours × 60 minutes/hour = 1440 minutes

     

    Calculate flow rate in mL/min: Flow rate (mL/min) = Total volume (mL) / Time (min)

    Flow rate (mL/min) = 1000 mL / 1440 min ≈ 0.694 mL/min

     

    Convert to drops per minute: Flow rate (gtt/min) = Flow rate (mL/min) × Drop factor (gtt/mL)

    Flow rate (gtt/min) = 0.694 mL/min × 20 gtt/mL ≈ 13.88 gtt/min

     

    Round to the nearest whole number: Flow rate ≈ 14 gtt/min

     

    Final answer: 14 gtt/min.

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  • 15. 

    Calculate the flow rate for manually regulated IV using the drops per minute. Ordered: 40 mEq KCL in 100 mL NS over 40 minutes. Tubing is 20 gtt/mL. Write the number only of the drops per minute.

    Correct Answer
    50
    Explanation
    To calculate the flow rate in drops per minute for the IV infusion:Convert time to minutes: Time = 40 minutesCalculate flow rate in mL/min: Flow rate (mL/min) = Total volume (mL) / Time (min)Flow rate (mL/min) = 100 mL / 40 min = 2.5 mL/minConvert to drops per minute: Flow rate (gtt/min) = Flow rate (mL/min) × Drop factor (gtt/mL)Flow rate (gtt/min) = 2.5 mL/min × 20 gtt/mL = 50 gtt/minFinal answer: 50 gtt/min.

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Nicolette Natale |DO (Medicine) |
Physician and Medical Writer
Nicolette Natale is a dedicated healthcare professional with a diverse background in medicine and education. She holds a Doctor of Osteopathic Medicine degree from Nova Southeastern University, as well as Bachelor's degrees in English Literature and Psychology from the University of Miami. With over 6 years of experience, Nicolette is a physician, research coordinator, and medical writer who is committed to advancing medical research and providing quality patient care.

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  • Current Version
  • Jan 13, 2025
    Quiz Edited by
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    Expert Reviewed by
    Nicolette Natale
  • Jan 19, 2012
    Quiz Created by
    Marie Fox
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