Dosage Calculation
Competency Exam
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1. The provider orders 500 mg of acetaminophen. Tablets
available are 250 mg each. How many tablets should the
nurse administer?
A. 1 tablet
B. 2 tablets
,C. 3 tablets
D. 4 tablets
Answer: B. 2 tablets
Rationale: 500 mg ÷ 250 mg per tablet = 2 tablets.
2. A patient is prescribed 1 g of cefazolin. The vial contains
500 mg per dose. How many doses are required?
A. 1 dose
B. 2 doses
C. 3 doses
D. 4 doses
Answer: B. 2 doses
Rationale: 1 g = 1000 mg. 1000 mg ÷ 500 mg = 2 doses.
3. The provider orders 0.5 mg of digoxin. The medication
available is 0.25 mg tablets. How many tablets will the
nurse administer?
A. 2 tablets
B. 1 tablet
C. ½ tablet
D. 3 tablets
Answer: A. 2 tablets
Rationale: 0.5 mg ÷ 0.25 mg = 2 tablets.
,4. A medication order reads 1500 mg. Convert this dose to
grams.
A. 0.15 g
B. 1.5 g
C. 15 g
D. 150 g
Answer: B. 1.5 g
Rationale: 1000 mg = 1 g. Therefore, 1500 mg = 1.5 g.
5. A patient requires 250 mcg of medication. Convert to mg.
A. 0.25 mg
B. 2.5 mg
C. 25 mg
D. 0.025 mg
Answer: A. 0.25 mg
Rationale: 1000 mcg = 1 mg. Therefore, 250 mcg = 0.25 mg.
6. The provider orders 5 mL of medication every 6 hours.
How many mL will the patient receive in 24 hours?
A. 10 mL
B. 15 mL
C. 20 mL
D. 25 mL
Answer: C. 20 mL
Rationale: Every 6 hours = 4 doses/day. 5 mL × 4 = 20 mL.
, 7. A medication is ordered at 2 mg/kg/day. The patient
weighs 50 kg. What is the total daily dose?
A. 50 mg
B. 100 mg
C. 150 mg
D. 200 mg
Answer: B. 100 mg
Rationale: 2 mg × 50 kg = 100 mg/day.
8. The patient weighs 176 lb. Convert weight to kilograms.
A. 60 kg
B. 70 kg
C. 80 kg
D. 90 kg
Answer: C. 80 kg
Rationale: 176 lb ÷ 2.2 = 80 kg.
9. The order reads 100 mL IV over 2 hours. What is the
infusion rate in mL/hr?
A. 25 mL/hr
B. 50 mL/hr
C. 75 mL/hr
D. 100 mL/hr
Competency Exam
Questions And Correct
Answers (Verified
Answers) Plus
Rationales 2025/2026
Q&A | Instant
Download Pdf
1. The provider orders 500 mg of acetaminophen. Tablets
available are 250 mg each. How many tablets should the
nurse administer?
A. 1 tablet
B. 2 tablets
,C. 3 tablets
D. 4 tablets
Answer: B. 2 tablets
Rationale: 500 mg ÷ 250 mg per tablet = 2 tablets.
2. A patient is prescribed 1 g of cefazolin. The vial contains
500 mg per dose. How many doses are required?
A. 1 dose
B. 2 doses
C. 3 doses
D. 4 doses
Answer: B. 2 doses
Rationale: 1 g = 1000 mg. 1000 mg ÷ 500 mg = 2 doses.
3. The provider orders 0.5 mg of digoxin. The medication
available is 0.25 mg tablets. How many tablets will the
nurse administer?
A. 2 tablets
B. 1 tablet
C. ½ tablet
D. 3 tablets
Answer: A. 2 tablets
Rationale: 0.5 mg ÷ 0.25 mg = 2 tablets.
,4. A medication order reads 1500 mg. Convert this dose to
grams.
A. 0.15 g
B. 1.5 g
C. 15 g
D. 150 g
Answer: B. 1.5 g
Rationale: 1000 mg = 1 g. Therefore, 1500 mg = 1.5 g.
5. A patient requires 250 mcg of medication. Convert to mg.
A. 0.25 mg
B. 2.5 mg
C. 25 mg
D. 0.025 mg
Answer: A. 0.25 mg
Rationale: 1000 mcg = 1 mg. Therefore, 250 mcg = 0.25 mg.
6. The provider orders 5 mL of medication every 6 hours.
How many mL will the patient receive in 24 hours?
A. 10 mL
B. 15 mL
C. 20 mL
D. 25 mL
Answer: C. 20 mL
Rationale: Every 6 hours = 4 doses/day. 5 mL × 4 = 20 mL.
, 7. A medication is ordered at 2 mg/kg/day. The patient
weighs 50 kg. What is the total daily dose?
A. 50 mg
B. 100 mg
C. 150 mg
D. 200 mg
Answer: B. 100 mg
Rationale: 2 mg × 50 kg = 100 mg/day.
8. The patient weighs 176 lb. Convert weight to kilograms.
A. 60 kg
B. 70 kg
C. 80 kg
D. 90 kg
Answer: C. 80 kg
Rationale: 176 lb ÷ 2.2 = 80 kg.
9. The order reads 100 mL IV over 2 hours. What is the
infusion rate in mL/hr?
A. 25 mL/hr
B. 50 mL/hr
C. 75 mL/hr
D. 100 mL/hr
