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)

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Marie Fox

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

100

125

To find the flow rate for 1500 mL RL over 12 hours, we need to use the formula:

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

Total volume: We have 1500 mL of RL solution.

Time: The solution needs to be infused over 12 hours.

Now, plugging these values into the formula:

Flow rate = 1500 mL / 12 hours = 125 mL/hour

Therefore, the flow rate in mL per hour is 125. So, the correct answer is C. 125.

Remember, accurate medication administration relies on precise calculations. Always be sure to double-check your work and ensure appropriate rounding.

Explanation

To find the flow rate for 1500 mL RL over 12 hours, we need to use the formula:

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

Total volume: We have 1500 mL of RL solution.

Time: The solution needs to be infused over 12 hours.

Now, plugging these values into the formula:

Flow rate = 1500 mL / 12 hours = 125 mL/hour

Therefore, the flow rate in mL per hour is 125. So, the correct answer is C. 125.

Remember, accurate medication administration relies on precise calculations. Always be sure to double-check your work and ensure appropriate rounding.

Submit

About This Quiz

IV Drip Rate Formula: Calculation Practice Quiz! - 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... see morehoning 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. see less

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

150 mL

200 mL

300 mL

600 Ml

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/hour

Therefore, the correct answer is 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/hour

Therefore, the correct answer is 150 mL.

Submit

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

75 mL

200 mL

125 mL

150 mL

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/hour

This 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.

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/hour

This 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.

Submit

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

93.75

100

125

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.

Explanation

The flow rate is 93.75 mL per hour.

Here's how we can calculate it:

Therefore, the correct answer is 93.75.

Submit

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

To find the flow rate per hour for the IV infusion:

Total Volume: 500 mL

Total Time: 3 hours

Calculate Flow Rate (mL/hour): Flow Rate = Total Volume / Total Time

Flow Rate = 500 mL / 3 hours = 166.67 mL/hour

Round to the nearest whole number: Flow Rate ≈ 167 mL/hour

Final answer: 167 mL/hour.

Explanation

To find the flow rate per hour for the IV infusion:

Total Volume: 500 mL

Total Time: 3 hours

Calculate Flow Rate (mL/hour): Flow Rate = Total Volume / Total Time

Flow Rate = 500 mL / 3 hours = 166.67 mL/hour

Round to the nearest whole number: Flow Rate ≈ 167 mL/hour

Final answer: 167 mL/hour.

Submit

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

17 mL

167 mL

175 mL

217 mL

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.

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.

Submit

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

100

125

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.

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.

Submit

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

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.

Explanation

Submit

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.

To calculate the flow rate in drops per minute for the IV infusion:

Convert time to minutes: Time = 3 hours × 60 min/hour = 180 min

Calculate flow rate in mL/min: Flow rate (mL/min) = Total volume (mL) / Time (min) = 250 mL / 180 min ≈ 1.39 mL/min

Convert 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/min

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

Final answer: 14 gtt/min.

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 min

Calculate flow rate in mL/min: Flow rate (mL/min) = Total volume (mL) / Time (min) = 250 mL / 180 min ≈ 1.39 mL/min

Convert 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/min

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

Final answer: 14 gtt/min.

Submit

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.

To calculate the flow rate in drops per minute for the IV infusion:

Convert time to minutes: Time = 8 hours × 60 min/hour = 480 min

Calculate 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/min

Convert 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/min

Round to nearest whole number: Flow rate = 16 gtt/min

Final answer: 16 gtt/min.

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 min

Calculate 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/min

Convert 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/min

Round to nearest whole number: Flow rate = 16 gtt/min

Final answer: 16 gtt/min.

Submit

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.

To calculate the flow rate in drops per minute for the IV infusion:

Convert time to minutes: Time = 12 hours × 60 min/hour = 720 min

Calculate 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/min

Convert 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/min

Round to nearest whole number: Flow rate = 31 gtt/min

Final answer: 31 gtt/min.

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 min

Calculate 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/min

Convert 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/min

Round to nearest whole number: Flow rate = 31 gtt/min

Final answer: 31 gtt/min.

Submit

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

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.

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.

Submit

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

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.

Explanation

Submit

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.

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.

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.

Submit

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.

To calculate the flow rate in drops per minute for the IV infusion:

Convert time to minutes: Time = 40 minutes

Calculate 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/min

Convert 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/min

Final answer: 50 gtt/min.

Explanation

To calculate the flow rate in drops per minute for the IV infusion:

Convert time to minutes: Time = 40 minutes

Calculate 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/min

Convert 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/min

Final answer: 50 gtt/min.

Submit

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Nicolette Natale |DO (Medicine) |

Physician and Medical Writer

Quiz Review Timeline (Updated): Jan 13, 2025 +

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Jan 13, 2025

Quiz Edited by
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Expert Reviewed by
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Jan 19, 2012

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

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

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

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

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

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

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

Which of the following formulas is used to calculate the IV drip rate...

Calculate the flow rate for manually regulated IV using the drops per...

Ordered: 500 mg ampicillin in 100mL NS to infuse over 30 minutes. What...

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

Calculate the flow rate for manually regulated IV using the drops per...