NCLEX RN Dosage Calculations Exam 2
100 Questions Plus Correct Answers
(Verified Answers) Plus Rationales
2026
1. The provider prescribes amoxicillin 500 mg PO. The available capsules
contain 250 mg each. How many capsules should the nurse administer?
A. 1 capsule
B. 1.5 capsules
C. 2 capsules
D. 3 capsules
Answer: 2 capsules
Rationale: Calculate 500 mg ÷ 250 mg/capsule = 2 capsules.
2. A patient is prescribed acetaminophen 650 mg PO. Available tablets are
325 mg each. How many tablets should the nurse administer?
A. 1 tablet
B. 1.5 tablets
C. 2 tablets
D. 3 tablets
Answer: 2 tablets
Rationale: 650 mg ÷ 325 mg/tablet = 2 tablets.
3. The prescription is for furosemide 40 mg PO. The tablets available are 20
mg each. How many tablets should be given?
A. 0.5 tablet
B. 1 tablet
,C. 2 tablets
D. 4 tablets
Answer: 2 tablets
Rationale: 40 mg ÷ 20 mg/tablet = 2 tablets.
4. The nurse must administer 0.75 g of a medication. How many milligrams
is this?
A. 75 mg
B. 250 mg
C. 750 mg
D. 7,500 mg
Answer: 750 mg
Rationale: 1 g = 1,000 mg; therefore, 0.75 g × 1,000 = 750 mg.
5. A medication order reads 1,500 mcg. How many milligrams is this?
A. 0.15 mg
B. 1.5 mg
C. 15 mg
D. 150 mg
Answer: 1.5 mg
Rationale: 1 mg = 1,000 mcg; 1,500 mcg ÷ 1,000 = 1.5 mg.
6. The provider orders 2.5 L of IV fluid. How many milliliters is this?
A. 250 mL
B. 500 mL
C. 2,500 mL
D. 25,000 mL
Answer: 2,500 mL
Rationale: 1 L = 1,000 mL; 2.5 × 1,000 = 2,500 mL.
, 7. A patient is prescribed 15 mL of an oral medication. How many teaspoons
is this?
A. 1 teaspoon
B. 2 teaspoons
C. 3 teaspoons
D. 5 teaspoons
Answer: 3 teaspoons
Rationale: 1 teaspoon equals 5 mL; 15 mL ÷ 5 mL = 3 teaspoons.
8. The prescription is for 30 mL of medication. How many tablespoons
should the nurse administer?
A. 1 tablespoon
B. 2 tablespoons
C. 3 tablespoons
D. 6 tablespoons
Answer: 2 tablespoons
Rationale: 1 tablespoon equals 15 mL; 30 mL ÷ 15 mL = 2 tablespoons.
9. A medication is available as 125 mg/5 mL. The prescribed dose is 250 mg.
How many milliliters should the nurse administer?
A. 5 mL
B. 10 mL
C. 15 mL
D. 20 mL
Answer: 10 mL
Rationale: 250 mg ÷ 125 mg × 5 mL = 10 mL.
10. The provider orders 750 mg of a medication. The available solution
contains 500 mg/2 mL. How many milliliters should be administered?
, A. 1 mL
B. 2 mL
C. 3 mL
D. 4 mL
Answer: 3 mL
Rationale: 750 mg ÷ 500 mg × 2 mL = 3 mL.
11. A patient weighs 154 lb. What is the patient's weight in kilograms?
A. 60 kg
B. 65 kg
C. 70 kg
D. 77 kg
Answer: 70 kg
Rationale: 154 lb ÷ 2.2 = 70 kg.
12. A child weighs 44 lb. What is the weight in kilograms?
A. 10 kg
B. 15 kg
C. 20 kg
D. 22 kg
Answer: 20 kg
Rationale: 44 lb ÷ 2.2 = 20 kg.
13. The provider prescribes a medication at 10 mg/kg/day for a child
weighing 30 kg. The dose is divided into two equal doses. How many
milligrams should be administered per dose?
A. 75 mg
B. 100 mg
C. 150 mg
100 Questions Plus Correct Answers
(Verified Answers) Plus Rationales
2026
1. The provider prescribes amoxicillin 500 mg PO. The available capsules
contain 250 mg each. How many capsules should the nurse administer?
A. 1 capsule
B. 1.5 capsules
C. 2 capsules
D. 3 capsules
Answer: 2 capsules
Rationale: Calculate 500 mg ÷ 250 mg/capsule = 2 capsules.
2. A patient is prescribed acetaminophen 650 mg PO. Available tablets are
325 mg each. How many tablets should the nurse administer?
A. 1 tablet
B. 1.5 tablets
C. 2 tablets
D. 3 tablets
Answer: 2 tablets
Rationale: 650 mg ÷ 325 mg/tablet = 2 tablets.
3. The prescription is for furosemide 40 mg PO. The tablets available are 20
mg each. How many tablets should be given?
A. 0.5 tablet
B. 1 tablet
,C. 2 tablets
D. 4 tablets
Answer: 2 tablets
Rationale: 40 mg ÷ 20 mg/tablet = 2 tablets.
4. The nurse must administer 0.75 g of a medication. How many milligrams
is this?
A. 75 mg
B. 250 mg
C. 750 mg
D. 7,500 mg
Answer: 750 mg
Rationale: 1 g = 1,000 mg; therefore, 0.75 g × 1,000 = 750 mg.
5. A medication order reads 1,500 mcg. How many milligrams is this?
A. 0.15 mg
B. 1.5 mg
C. 15 mg
D. 150 mg
Answer: 1.5 mg
Rationale: 1 mg = 1,000 mcg; 1,500 mcg ÷ 1,000 = 1.5 mg.
6. The provider orders 2.5 L of IV fluid. How many milliliters is this?
A. 250 mL
B. 500 mL
C. 2,500 mL
D. 25,000 mL
Answer: 2,500 mL
Rationale: 1 L = 1,000 mL; 2.5 × 1,000 = 2,500 mL.
, 7. A patient is prescribed 15 mL of an oral medication. How many teaspoons
is this?
A. 1 teaspoon
B. 2 teaspoons
C. 3 teaspoons
D. 5 teaspoons
Answer: 3 teaspoons
Rationale: 1 teaspoon equals 5 mL; 15 mL ÷ 5 mL = 3 teaspoons.
8. The prescription is for 30 mL of medication. How many tablespoons
should the nurse administer?
A. 1 tablespoon
B. 2 tablespoons
C. 3 tablespoons
D. 6 tablespoons
Answer: 2 tablespoons
Rationale: 1 tablespoon equals 15 mL; 30 mL ÷ 15 mL = 2 tablespoons.
9. A medication is available as 125 mg/5 mL. The prescribed dose is 250 mg.
How many milliliters should the nurse administer?
A. 5 mL
B. 10 mL
C. 15 mL
D. 20 mL
Answer: 10 mL
Rationale: 250 mg ÷ 125 mg × 5 mL = 10 mL.
10. The provider orders 750 mg of a medication. The available solution
contains 500 mg/2 mL. How many milliliters should be administered?
, A. 1 mL
B. 2 mL
C. 3 mL
D. 4 mL
Answer: 3 mL
Rationale: 750 mg ÷ 500 mg × 2 mL = 3 mL.
11. A patient weighs 154 lb. What is the patient's weight in kilograms?
A. 60 kg
B. 65 kg
C. 70 kg
D. 77 kg
Answer: 70 kg
Rationale: 154 lb ÷ 2.2 = 70 kg.
12. A child weighs 44 lb. What is the weight in kilograms?
A. 10 kg
B. 15 kg
C. 20 kg
D. 22 kg
Answer: 20 kg
Rationale: 44 lb ÷ 2.2 = 20 kg.
13. The provider prescribes a medication at 10 mg/kg/day for a child
weighing 30 kg. The dose is divided into two equal doses. How many
milligrams should be administered per dose?
A. 75 mg
B. 100 mg
C. 150 mg
