Boost your nursing success with this comprehensive study guide and
NCLEX-style prep resource. Compiled from student notes and practice
resources — not an official exam.
---
# Dosage Calculations & Nursing Math Success Pack – 2025/2026
Edition | Complete Prep Guide & Practice Questions Bundle
---
1. A nurse is preparing to administer 500 mg of a medication. The available medication is in a liquid
concentration of 250 mg/5 mL. How many mL should the nurse administer?
A. 2 mL
B. 5 mL
C. 10 mL
D. 15 mL
💫ANSWER✔️✔️: C
💫RATIONALE✔️✔️: The correct answer is C. Using the formula Desired/Have x Volume = (500 mg / 250
mg) x 5 mL = 2 x 5 mL = 10 mL. Option A is incorrect because it does not account for the concentration
correctly. Option B is wrong as 5 mL would deliver only 250 mg. Option D is incorrect as it exceeds the
needed dose. I always use the formula "Desired over Have" to solve these problems — a key nursing
study guide tip for student success in nursing exam prep.
2. A client is prescribed 40 mg of furosemide IV push. The vial contains 10 mg/mL. How many mL should
the nurse administer?
A. 2 mL
B. 4 mL
,C. 6 mL
D. 8 mL
💫ANSWER✔️✔️: B
💫RATIONALE✔️✔️: The correct answer is B. The calculation is 40 mg / 10 mg/mL = 4 mL. Option A is
incorrect because it would deliver 20 mg. Option C is wrong as it would deliver 60 mg. Option D is
incorrect as it would deliver 80 mg. This is a fundamental dosage calculation in this nursing revision
notes for pharmacology and student success.
3. A nurse is calculating the IV flow rate for 1000 mL of Normal Saline to be infused over 8 hours. The
drop factor is 20 gtt/mL. What is the flow rate in gtt/min?
A. 42 gtt/min
B. 21 gtt/min
C. 83 gtt/min
D. 125 gtt/min
💫ANSWER✔️✔️: A
💫RATIONALE✔️✔️: The correct answer is A. The formula is (Total volume / Total time in minutes) x Drop
factor = (1000 mL / 480 min) x 20 gtt/mL = 2.08 x 20 = 41.6, rounded to 42 gtt/min. Option B is incorrect
as it uses the wrong drop factor. Option C is wrong as it miscalculates the time. Option D is incorrect as it
does not factor in the drop factor correctly. This is a must-know practice question for nursing exam prep
in IV therapy.
4. A client weighs 220 lbs. The nurse needs to convert this weight to kilograms. What is the client's
weight in kg? (Round to the nearest tenth.)
A. 100 kg
B. 110 kg
C. 90 kg
D. 105 kg
💫ANSWER✔️✔️: A
,💫RATIONALE✔️✔️: The correct answer is A. 220 lbs / 2.2 = 100 kg. Option B is incorrect as it does not
divide by 2.2. Option C is wrong as it underestimates the weight. Option D is incorrect as it is not the
correct conversion. This is a key conversion in this nursing study guide for dosage calculations and
medication administration.
5. A nurse is to administer 0.5 g of a medication. The available tablets are 250 mg each. How many
tablets should the nurse give?
A. 1 tablet
B. 2 tablets
C. 3 tablets
D. 4 tablets
💫ANSWER✔️✔️: B
💫RATIONALE✔️✔️: The correct answer is B. First, convert 0.5 g to mg: 0.5 g x 1000 mg/g = 500 mg. Then,
500 mg / 250 mg/tablet = 2 tablets. Option A is incorrect as it delivers only 250 mg. Option C is wrong as
it delivers 750 mg. Option D is incorrect as it delivers 1000 mg. This is a common conversion in nursing
exam practice, and remembering metric prefixes is key for student success.
6. A nurse is calculating the intake for a client. The client drank 8 oz of water, 6 oz of juice, and 10 oz of
coffee. The client also received 500 mL of IV fluids. What is the total intake in mL? (1 oz = 30 mL)
A. 720 mL
B. 1020 mL
C. 1220 mL
D. 220 mL
💫ANSWER✔️✔️: C
💫RATIONALE✔️✔️: The correct answer is C. Total oral intake is (8 + 6 + 10) oz = 24 oz x 30 mL/oz = 720
mL. Add IV fluids 500 mL for a total of 1220 mL. Option A is incorrect as it only accounts for the oral
intake. Option B is wrong as it is a miscalculation. Option D is incorrect as it is too low. This is a key fluid
balance concept in this nursing study guide for student success in clinical settings.
7. A client is prescribed 75 mg of a medication. The available concentration is 50 mg/2 mL. How many
mL should the nurse administer?
, A. 1.5 mL
B. 2 mL
C. 3 mL
D. 4 mL
💫ANSWER✔️✔️: C
💫RATIONALE✔️✔️: The correct answer is C. The formula is Desired/Have x Volume = (75 mg / 50 mg) x 2
mL = 1.5 x 2 mL = 3 mL. Option A is incorrect as it is too low. Option B is wrong as it delivers 50 mg.
Option D is incorrect as it delivers 100 mg. This is a key practice question for nursing exam prep in
medication calculations.
8. A nurse is to infuse 250 mL of IV fluid over 2 hours. The drop factor is 15 gtt/mL. What is the flow rate
in gtt/min?
A. 31 gtt/min
B. 15 gtt/min
C. 42 gtt/min
D. 62 gtt/min
💫ANSWER✔️✔️: A
💫RATIONALE✔️✔️: The correct answer is A. Total time in minutes = 120 min. (250 mL / 120 min) x 15
gtt/mL = 2.08 x 15 = 31.2, rounded to 31 gtt/min. Option B is incorrect as it does not use the correct
volume. Option C is wrong as it uses the wrong time. Option D is incorrect as it is a miscalculation. This is
a vital dosage calculation in this nursing revision notes for IV therapy.
9. A client weighs 66 kg. The nurse needs to convert this weight to pounds. What is the client's weight in
lbs? (Round to the nearest whole number.)
A. 132 lbs
B. 145 lbs
C. 120 lbs
D. 110 lbs
NCLEX-style prep resource. Compiled from student notes and practice
resources — not an official exam.
---
# Dosage Calculations & Nursing Math Success Pack – 2025/2026
Edition | Complete Prep Guide & Practice Questions Bundle
---
1. A nurse is preparing to administer 500 mg of a medication. The available medication is in a liquid
concentration of 250 mg/5 mL. How many mL should the nurse administer?
A. 2 mL
B. 5 mL
C. 10 mL
D. 15 mL
💫ANSWER✔️✔️: C
💫RATIONALE✔️✔️: The correct answer is C. Using the formula Desired/Have x Volume = (500 mg / 250
mg) x 5 mL = 2 x 5 mL = 10 mL. Option A is incorrect because it does not account for the concentration
correctly. Option B is wrong as 5 mL would deliver only 250 mg. Option D is incorrect as it exceeds the
needed dose. I always use the formula "Desired over Have" to solve these problems — a key nursing
study guide tip for student success in nursing exam prep.
2. A client is prescribed 40 mg of furosemide IV push. The vial contains 10 mg/mL. How many mL should
the nurse administer?
A. 2 mL
B. 4 mL
,C. 6 mL
D. 8 mL
💫ANSWER✔️✔️: B
💫RATIONALE✔️✔️: The correct answer is B. The calculation is 40 mg / 10 mg/mL = 4 mL. Option A is
incorrect because it would deliver 20 mg. Option C is wrong as it would deliver 60 mg. Option D is
incorrect as it would deliver 80 mg. This is a fundamental dosage calculation in this nursing revision
notes for pharmacology and student success.
3. A nurse is calculating the IV flow rate for 1000 mL of Normal Saline to be infused over 8 hours. The
drop factor is 20 gtt/mL. What is the flow rate in gtt/min?
A. 42 gtt/min
B. 21 gtt/min
C. 83 gtt/min
D. 125 gtt/min
💫ANSWER✔️✔️: A
💫RATIONALE✔️✔️: The correct answer is A. The formula is (Total volume / Total time in minutes) x Drop
factor = (1000 mL / 480 min) x 20 gtt/mL = 2.08 x 20 = 41.6, rounded to 42 gtt/min. Option B is incorrect
as it uses the wrong drop factor. Option C is wrong as it miscalculates the time. Option D is incorrect as it
does not factor in the drop factor correctly. This is a must-know practice question for nursing exam prep
in IV therapy.
4. A client weighs 220 lbs. The nurse needs to convert this weight to kilograms. What is the client's
weight in kg? (Round to the nearest tenth.)
A. 100 kg
B. 110 kg
C. 90 kg
D. 105 kg
💫ANSWER✔️✔️: A
,💫RATIONALE✔️✔️: The correct answer is A. 220 lbs / 2.2 = 100 kg. Option B is incorrect as it does not
divide by 2.2. Option C is wrong as it underestimates the weight. Option D is incorrect as it is not the
correct conversion. This is a key conversion in this nursing study guide for dosage calculations and
medication administration.
5. A nurse is to administer 0.5 g of a medication. The available tablets are 250 mg each. How many
tablets should the nurse give?
A. 1 tablet
B. 2 tablets
C. 3 tablets
D. 4 tablets
💫ANSWER✔️✔️: B
💫RATIONALE✔️✔️: The correct answer is B. First, convert 0.5 g to mg: 0.5 g x 1000 mg/g = 500 mg. Then,
500 mg / 250 mg/tablet = 2 tablets. Option A is incorrect as it delivers only 250 mg. Option C is wrong as
it delivers 750 mg. Option D is incorrect as it delivers 1000 mg. This is a common conversion in nursing
exam practice, and remembering metric prefixes is key for student success.
6. A nurse is calculating the intake for a client. The client drank 8 oz of water, 6 oz of juice, and 10 oz of
coffee. The client also received 500 mL of IV fluids. What is the total intake in mL? (1 oz = 30 mL)
A. 720 mL
B. 1020 mL
C. 1220 mL
D. 220 mL
💫ANSWER✔️✔️: C
💫RATIONALE✔️✔️: The correct answer is C. Total oral intake is (8 + 6 + 10) oz = 24 oz x 30 mL/oz = 720
mL. Add IV fluids 500 mL for a total of 1220 mL. Option A is incorrect as it only accounts for the oral
intake. Option B is wrong as it is a miscalculation. Option D is incorrect as it is too low. This is a key fluid
balance concept in this nursing study guide for student success in clinical settings.
7. A client is prescribed 75 mg of a medication. The available concentration is 50 mg/2 mL. How many
mL should the nurse administer?
, A. 1.5 mL
B. 2 mL
C. 3 mL
D. 4 mL
💫ANSWER✔️✔️: C
💫RATIONALE✔️✔️: The correct answer is C. The formula is Desired/Have x Volume = (75 mg / 50 mg) x 2
mL = 1.5 x 2 mL = 3 mL. Option A is incorrect as it is too low. Option B is wrong as it delivers 50 mg.
Option D is incorrect as it delivers 100 mg. This is a key practice question for nursing exam prep in
medication calculations.
8. A nurse is to infuse 250 mL of IV fluid over 2 hours. The drop factor is 15 gtt/mL. What is the flow rate
in gtt/min?
A. 31 gtt/min
B. 15 gtt/min
C. 42 gtt/min
D. 62 gtt/min
💫ANSWER✔️✔️: A
💫RATIONALE✔️✔️: The correct answer is A. Total time in minutes = 120 min. (250 mL / 120 min) x 15
gtt/mL = 2.08 x 15 = 31.2, rounded to 31 gtt/min. Option B is incorrect as it does not use the correct
volume. Option C is wrong as it uses the wrong time. Option D is incorrect as it is a miscalculation. This is
a vital dosage calculation in this nursing revision notes for IV therapy.
9. A client weighs 66 kg. The nurse needs to convert this weight to pounds. What is the client's weight in
lbs? (Round to the nearest whole number.)
A. 132 lbs
B. 145 lbs
C. 120 lbs
D. 110 lbs
