CALCULATION OF DRUG DOSAGES Original Nursing Study Guide & Exam Questions with Answers and Rationales.pdf

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CALCULATION OF DRUG DOSAGES Original Nursing Study Guide & Exam
Questions with Answers and Rationales




Section 1: Basic Math Review and Conversions (Questions)
1. How many milligrams are in 1 gram?
A. 10 mg
B. 100 mg
C. 1,000 mg
D. 10,000 mg
Answer: C
Rationale: 1 gram = 1,000 milligrams. To convert grams to
milligrams, multiply by 1,000.
2. How many micrograms are in 1 milligram?
A. 10 mcg
B. 100 mcg
C. 1,000 mcg
D. 10,000 mcg
Answer: C
Rationale: 1 milligram = 1,000 micrograms. To convert
milligrams to micrograms, multiply by 1,000.
3. How many milliliters are in 1 liter?
A. 10 mL
B. 100 mL
C. 1,000 mL

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D. 10,000 mL
Answer: C
Rationale: 1 liter = 1,000 milliliters. To convert liters to
milliliters, multiply by 1,000.
4. How many milliliters are in 1 teaspoon?
A. 2 mL
B. 5 mL
C. 10 mL
D. 15 mL
Answer: B
Rationale: 1 teaspoon = 5 milliliters. This is a standard
household measurement conversion used in medication
administration.
5. How many milliliters are in 1 tablespoon?
A. 5 mL
B. 10 mL
C. 15 mL
D. 20 mL
Answer: C
Rationale: 1 tablespoon = 15 milliliters (equivalent to 3
teaspoons).
6. How many milliliters are in 1 fluid ounce?
A. 15 mL
B. 20 mL

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C. 25 mL
D. 30 mL
Answer: D
Rationale: 1 fluid ounce = 30 milliliters. This is commonly
used for liquid medications and fluid intake calculations.
7. Convert 0.5 grams to milligrams.
A. 5 mg
B. 50 mg
C. 500 mg
D. 5,000 mg
Answer: C
Rationale: 0.5 g × 1,000 mg/g = 500 mg. Move the
decimal point three places to the right.
8. Convert 2,500 micrograms to milligrams.
A. 0.25 mg
B. 2.5 mg
C. 25 mg
D. 250 mg
Answer: B
Rationale: 2,500 mcg ÷ 1,000 mcg/mg = 2.5 mg. Move the
decimal point three places to the left.
9. Convert 0.75 liters to milliliters.
A. 75 mL
B. 750 mL