IV CALCULATIONS EXAM QUESTIONS WITH
VERIFIED ANSWERS LATEST 2025/2026
1. :: Calculate the flow rate in drops per minute for an IV infusion of 1000
mL over 8 hours using a drop factor of 15 drops/mL. A: Flow rate =
(Volume × Drop factor) ÷ Time in minutes = (1000 mL × 15 drops/mL) ÷ (8 ×
60 minutes) = 15,000 drops ÷ 480 minutes = 31.25 or 31 drops/minute
2. :: A patient is to receive 500 mL of normal saline solution over 4 hours.
The drop factor is 10 drops/mL. What is the flow rate in drops per minute?
A: Flow rate = (500 mL × 10 drops/mL) ÷ (4 × 60 minutes) = 5,000 drops ÷ 240
minutes = 20.8 or 21 drops/minute
3. :: An order is written for 750 mL D5W to infuse over 6 hours. Using a
drop factor of 20 drops/mL, calculate the flow rate in drops per minute. A:
Flow rate = (750 mL × 20 drops/mL) ÷ (6 × 60 minutes) = 15,000 drops ÷ 360
minutes = 41.7 or 42 drops/minute
4. :: A patient is prescribed 1200 mL of Lactated Ringer's solution over 10
hours. The administration set delivers 15 drops/mL. What is the flow rate
in drops per minute? A: Flow rate = (1200 mL × 15 drops/mL) ÷ (10 × 60
minutes) = 18,000 drops ÷ 600 minutes = 30 drops/minute
5. :: Calculate the flow rate in drops per minute for an IV infusion of 250
mL over 2 hours using a drop factor of 60 drops/mL. A: Flow rate = (250
mL × 60 drops/mL) ÷ (2 × 60 minutes) = 15,000 drops ÷ 120 minutes = 125
drops/minute
6. :: A patient re:uires 350 mL of IV fluid to be administered over 3.5
hours. If the drop factor is 20 drops/mL, what is the flow rate in drops per
minute? A: Flow rate = (350 mL × 20 drops/mL) ÷ (3.5 × 60 minutes) = 7,000
drops ÷ 210 minutes = 33.3 or 33 drops/minute
7. :: An IV solution of 100 mL is to infuse over 30 minutes. The drop factor
is 10 drops/mL. Calculate the flow rate in drops per minute. A: Flow rate =
(100 mL × 10 drops/mL) ÷ 30 minutes = 1,000 drops ÷ 30 minutes = 33.3 or 33
drops/minute
, 8. :: Calculate the flow rate in drops per minute for an IV infusion of 150
mL over 45 minutes using a drop factor of 15 drops/mL. A: Flow rate = (150
mL × 15 drops/mL) ÷ 45 minutes = 2,250 drops ÷ 45 minutes = 50 drops/minute
9. :: A physician orders 1500 mL of fluid to run over 12 hours. The drop
factor is 15 drops/mL. What is the flow rate in drops per minute? A: Flow
rate = (1500 mL × 15 drops/mL) ÷ (12 × 60 minutes) = 22,500 drops ÷ 720
minutes = 31.25 or 31 drops/minute
10. :: Calculate the flow rate in drops per minute for 300 mL of IV solution
to be infused over 2.5 hours using a drop factor of 20 drops/mL. A: Flow
rate = (300 mL × 20 drops/mL) ÷ (2.5 × 60 minutes) = 6,000 drops ÷ 150
minutes = 40 drops/minute
IV Rate in mL/hr Calculations
11. :: A physician orders 1000 mL of D5W to run over 8 hours. Calculate
the flow rate in mL/hr. A: Flow rate = Volume ÷ Time in hours = 1000 mL ÷
8 hours = 125 mL/hr
12. :: A patient is to receive 750 mL of normal saline over 5 hours. What is
the flow rate in mL/hr? A: Flow rate = 750 mL ÷ 5 hours = 150 mL/hr
13. :: An IV of 500 mL is ordered to run for 4 hours. Calculate the hourly
rate in mL/hr. A: Flow rate = 500 mL ÷ 4 hours = 125 mL/hr
14. :: A physician orders 2000 mL of Lactated Ringer's to infuse over 10
hours. What is the flow rate in mL/hr? A: Flow rate = 2000 mL ÷ 10 hours =
200 mL/hr
15. :: Calculate the hourly rate in mL/hr for 250 mL of an IV solution to
run over 90 minutes. A: Flow rate = (250 mL ÷ 90 minutes) × 60 minutes/hour
= 250 mL ÷ 1.5 hours = 166.7 or 167 mL/hr
16. :: A patient is to receive 350 mL of IV fluid over 2 hours and 20
minutes. What is the flow rate in mL/hr? A: Total time in hours = 2 + (20 ÷
60) = 2.33 hours Flow rate = 350 mL ÷ 2.33 hours = 150 mL/hr
17. :: An IV of 1500 mL is ordered to infuse over 12 hours. Calculate the
flow rate in mL/hr. A: Flow rate = 1500 mL ÷ 12 hours = 125 mL/hr
18. :: A physician orders 100 mL of an antibiotic solution to infuse over 30
minutes. What is the flow rate in mL/hr? A: Flow rate = (100 mL ÷ 30
minutes) × 60 minutes/hour = 100 mL ÷ 0.5 hours = 200 mL/hr
VERIFIED ANSWERS LATEST 2025/2026
1. :: Calculate the flow rate in drops per minute for an IV infusion of 1000
mL over 8 hours using a drop factor of 15 drops/mL. A: Flow rate =
(Volume × Drop factor) ÷ Time in minutes = (1000 mL × 15 drops/mL) ÷ (8 ×
60 minutes) = 15,000 drops ÷ 480 minutes = 31.25 or 31 drops/minute
2. :: A patient is to receive 500 mL of normal saline solution over 4 hours.
The drop factor is 10 drops/mL. What is the flow rate in drops per minute?
A: Flow rate = (500 mL × 10 drops/mL) ÷ (4 × 60 minutes) = 5,000 drops ÷ 240
minutes = 20.8 or 21 drops/minute
3. :: An order is written for 750 mL D5W to infuse over 6 hours. Using a
drop factor of 20 drops/mL, calculate the flow rate in drops per minute. A:
Flow rate = (750 mL × 20 drops/mL) ÷ (6 × 60 minutes) = 15,000 drops ÷ 360
minutes = 41.7 or 42 drops/minute
4. :: A patient is prescribed 1200 mL of Lactated Ringer's solution over 10
hours. The administration set delivers 15 drops/mL. What is the flow rate
in drops per minute? A: Flow rate = (1200 mL × 15 drops/mL) ÷ (10 × 60
minutes) = 18,000 drops ÷ 600 minutes = 30 drops/minute
5. :: Calculate the flow rate in drops per minute for an IV infusion of 250
mL over 2 hours using a drop factor of 60 drops/mL. A: Flow rate = (250
mL × 60 drops/mL) ÷ (2 × 60 minutes) = 15,000 drops ÷ 120 minutes = 125
drops/minute
6. :: A patient re:uires 350 mL of IV fluid to be administered over 3.5
hours. If the drop factor is 20 drops/mL, what is the flow rate in drops per
minute? A: Flow rate = (350 mL × 20 drops/mL) ÷ (3.5 × 60 minutes) = 7,000
drops ÷ 210 minutes = 33.3 or 33 drops/minute
7. :: An IV solution of 100 mL is to infuse over 30 minutes. The drop factor
is 10 drops/mL. Calculate the flow rate in drops per minute. A: Flow rate =
(100 mL × 10 drops/mL) ÷ 30 minutes = 1,000 drops ÷ 30 minutes = 33.3 or 33
drops/minute
, 8. :: Calculate the flow rate in drops per minute for an IV infusion of 150
mL over 45 minutes using a drop factor of 15 drops/mL. A: Flow rate = (150
mL × 15 drops/mL) ÷ 45 minutes = 2,250 drops ÷ 45 minutes = 50 drops/minute
9. :: A physician orders 1500 mL of fluid to run over 12 hours. The drop
factor is 15 drops/mL. What is the flow rate in drops per minute? A: Flow
rate = (1500 mL × 15 drops/mL) ÷ (12 × 60 minutes) = 22,500 drops ÷ 720
minutes = 31.25 or 31 drops/minute
10. :: Calculate the flow rate in drops per minute for 300 mL of IV solution
to be infused over 2.5 hours using a drop factor of 20 drops/mL. A: Flow
rate = (300 mL × 20 drops/mL) ÷ (2.5 × 60 minutes) = 6,000 drops ÷ 150
minutes = 40 drops/minute
IV Rate in mL/hr Calculations
11. :: A physician orders 1000 mL of D5W to run over 8 hours. Calculate
the flow rate in mL/hr. A: Flow rate = Volume ÷ Time in hours = 1000 mL ÷
8 hours = 125 mL/hr
12. :: A patient is to receive 750 mL of normal saline over 5 hours. What is
the flow rate in mL/hr? A: Flow rate = 750 mL ÷ 5 hours = 150 mL/hr
13. :: An IV of 500 mL is ordered to run for 4 hours. Calculate the hourly
rate in mL/hr. A: Flow rate = 500 mL ÷ 4 hours = 125 mL/hr
14. :: A physician orders 2000 mL of Lactated Ringer's to infuse over 10
hours. What is the flow rate in mL/hr? A: Flow rate = 2000 mL ÷ 10 hours =
200 mL/hr
15. :: Calculate the hourly rate in mL/hr for 250 mL of an IV solution to
run over 90 minutes. A: Flow rate = (250 mL ÷ 90 minutes) × 60 minutes/hour
= 250 mL ÷ 1.5 hours = 166.7 or 167 mL/hr
16. :: A patient is to receive 350 mL of IV fluid over 2 hours and 20
minutes. What is the flow rate in mL/hr? A: Total time in hours = 2 + (20 ÷
60) = 2.33 hours Flow rate = 350 mL ÷ 2.33 hours = 150 mL/hr
17. :: An IV of 1500 mL is ordered to infuse over 12 hours. Calculate the
flow rate in mL/hr. A: Flow rate = 1500 mL ÷ 12 hours = 125 mL/hr
18. :: A physician orders 100 mL of an antibiotic solution to infuse over 30
minutes. What is the flow rate in mL/hr? A: Flow rate = (100 mL ÷ 30
minutes) × 60 minutes/hour = 100 mL ÷ 0.5 hours = 200 mL/hr
