Nursing Dosage Calculations & Medication Administration Guide |
120 Questions with Worked Solutions and Rationales 2026/2027
Section 1 Conversions and unit consistency
Topic review
Conversions and unit consistency. Metric conversions: 1 g equals 1000 mg, 1 mg
equals 1000 mcg, and 1 L equals 1000 mL. For these exercises use 2.2 lb per kg and
60 minutes per hour. Never substitute a weight in pounds into a dose expressed per
kilogram.
Practice questions
1. Convert 0.75 g to mg. Give the exact result without unnecessary trailing
zeros.
A. 7500 mg
B. 1500 mg
C. 375 mg
D. 750 mg
Answer: D
Rationale: 0.75 g multiply by 1000 to obtain mg. Keep the units consistent. Final
answer: 750 mg.
2. Convert 1250 mg to g. Give the exact result without unnecessary trailing
zeros.
A. 12.5 g
B. 0.625 g
C. 2.5 g
D. 1.25 g
Answer: D
Rationale: 1250 mg multiply by 0.001 to obtain g. Keep the units consistent. Final
answer: 1.25 g.
3. Convert 0.4 mg to mcg. Give the exact result without unnecessary trailing
zeros.
A. 800 mcg
B. 200 mcg
C. 4000 mcg
D. 400 mcg
Answer: D
Rationale: 0.4 mg multiply by 1000 to obtain mcg. Keep the units consistent. Final
answer: 400 mcg.
Page 1
,4. Convert 250 mcg to mg. Give the exact result without unnecessary trailing
zeros.
A. 0.5 mg
B. 2.5 mg
C. 0.125 mg
D. 0.25 mg
Answer: D
Rationale: 250 mcg multiply by 0.001 to obtain mg. Keep the units consistent. Final
answer: 0.25 mg.
5. Convert 1.5 L to mL. Give the exact result without unnecessary trailing
zeros.
A. 15000 mL
B. 750 mL
C. 3000 mL
D. 1500 mL
Answer: D
Rationale: 1.5 L multiply by 1000 to obtain mL. Keep the units consistent. Final
answer: 1500 mL.
6. Convert 750 mL to L. Give the exact result without unnecessary trailing
zeros.
A. 7.5 L
B. 1.5 L
C. 0.75 L
D. 0.375 L
Answer: C
Rationale: 750 mL multiply by 0.001 to obtain L. Keep the units consistent. Final
answer: 0.75 L.
7. Convert 132 lb to kg. Use 2.2 lb per kg and round to one decimal place.
A. 120 kg
B. 30 kg
C. 600 kg
D. 60 kg
Answer: D
Rationale: 132 lb divide by 2.2 to obtain kg. Keep the units consistent. Final answer:
60 kg.
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,8. Convert 88 lb to kg. Use 2.2 lb per kg and round to one decimal place.
A. 20 kg
B. 400 kg
C. 80 kg
D. 40 kg
Answer: D
Rationale: 88 lb divide by 2.2 to obtain kg. Keep the units consistent. Final answer:
40 kg.
9. Convert 2.25 hours to minutes. Give the exact result without unnecessary
trailing zeros.
A. 270 minutes
B. 68 minutes
C. 1350 minutes
D. 135 minutes
Answer: D
Rationale: 2.25 hours multiply by 60 to obtain minutes. Keep the units consistent.
Final answer: 135 minutes.
10. Convert 150 minutes to hours. Give the exact result without unnecessary
trailing zeros.
A. 1.3 hours
B. 2.5 hours
C. 5 hours
D. 25 hours
Answer: B
Rationale: 150 minutes divide by 60 to obtain hours. Keep the units consistent.
Final answer: 2.5 hours.
Page 3
, Section 2 Oral tablets
Topic review
Oral tablets. Tablet count equals the ordered dose divided by the strength per
tablet. Split only products and tablets approved for splitting. Do not assume that
extended-release or enteric-coated formulations can be manipulated.
Practice questions
11. An oral order is 500 mg. Available immediate-release tablets contain 250
mg each and are approved for splitting into halves. How many tablets are
needed? Give the exact number.
A. 4 tablets
B. 20 tablets
C. 2 tablets
D. 1 tablets
Answer: C
Rationale: Tablets = ordered dose divided by tablet strength = 500 mg / 250 mg per
tablet. Final answer: 2 tablets.
12. An oral order is 750 mg. Available immediate-release tablets contain 250
mg each and are approved for splitting into halves. How many tablets are
needed? Give the exact number.
A. 6 tablets
B. 1.5 tablets
C. 3 tablets
D. 30 tablets
Answer: C
Rationale: Tablets = ordered dose divided by tablet strength = 750 mg / 250 mg per
tablet. Final answer: 3 tablets.
13. An oral order is 375 mg. Available immediate-release tablets contain 250
mg each and are approved for splitting into halves. How many tablets are
needed? Give the exact number.
A. 0.8 tablets
B. 3 tablets
C. 1.5 tablets
D. 15 tablets
Answer: C
Rationale: Tablets = ordered dose divided by tablet strength = 375 mg / 250 mg per
tablet. Final answer: 1.5 tablets.
Page 4
120 Questions with Worked Solutions and Rationales 2026/2027
Section 1 Conversions and unit consistency
Topic review
Conversions and unit consistency. Metric conversions: 1 g equals 1000 mg, 1 mg
equals 1000 mcg, and 1 L equals 1000 mL. For these exercises use 2.2 lb per kg and
60 minutes per hour. Never substitute a weight in pounds into a dose expressed per
kilogram.
Practice questions
1. Convert 0.75 g to mg. Give the exact result without unnecessary trailing
zeros.
A. 7500 mg
B. 1500 mg
C. 375 mg
D. 750 mg
Answer: D
Rationale: 0.75 g multiply by 1000 to obtain mg. Keep the units consistent. Final
answer: 750 mg.
2. Convert 1250 mg to g. Give the exact result without unnecessary trailing
zeros.
A. 12.5 g
B. 0.625 g
C. 2.5 g
D. 1.25 g
Answer: D
Rationale: 1250 mg multiply by 0.001 to obtain g. Keep the units consistent. Final
answer: 1.25 g.
3. Convert 0.4 mg to mcg. Give the exact result without unnecessary trailing
zeros.
A. 800 mcg
B. 200 mcg
C. 4000 mcg
D. 400 mcg
Answer: D
Rationale: 0.4 mg multiply by 1000 to obtain mcg. Keep the units consistent. Final
answer: 400 mcg.
Page 1
,4. Convert 250 mcg to mg. Give the exact result without unnecessary trailing
zeros.
A. 0.5 mg
B. 2.5 mg
C. 0.125 mg
D. 0.25 mg
Answer: D
Rationale: 250 mcg multiply by 0.001 to obtain mg. Keep the units consistent. Final
answer: 0.25 mg.
5. Convert 1.5 L to mL. Give the exact result without unnecessary trailing
zeros.
A. 15000 mL
B. 750 mL
C. 3000 mL
D. 1500 mL
Answer: D
Rationale: 1.5 L multiply by 1000 to obtain mL. Keep the units consistent. Final
answer: 1500 mL.
6. Convert 750 mL to L. Give the exact result without unnecessary trailing
zeros.
A. 7.5 L
B. 1.5 L
C. 0.75 L
D. 0.375 L
Answer: C
Rationale: 750 mL multiply by 0.001 to obtain L. Keep the units consistent. Final
answer: 0.75 L.
7. Convert 132 lb to kg. Use 2.2 lb per kg and round to one decimal place.
A. 120 kg
B. 30 kg
C. 600 kg
D. 60 kg
Answer: D
Rationale: 132 lb divide by 2.2 to obtain kg. Keep the units consistent. Final answer:
60 kg.
Page 2
,8. Convert 88 lb to kg. Use 2.2 lb per kg and round to one decimal place.
A. 20 kg
B. 400 kg
C. 80 kg
D. 40 kg
Answer: D
Rationale: 88 lb divide by 2.2 to obtain kg. Keep the units consistent. Final answer:
40 kg.
9. Convert 2.25 hours to minutes. Give the exact result without unnecessary
trailing zeros.
A. 270 minutes
B. 68 minutes
C. 1350 minutes
D. 135 minutes
Answer: D
Rationale: 2.25 hours multiply by 60 to obtain minutes. Keep the units consistent.
Final answer: 135 minutes.
10. Convert 150 minutes to hours. Give the exact result without unnecessary
trailing zeros.
A. 1.3 hours
B. 2.5 hours
C. 5 hours
D. 25 hours
Answer: B
Rationale: 150 minutes divide by 60 to obtain hours. Keep the units consistent.
Final answer: 2.5 hours.
Page 3
, Section 2 Oral tablets
Topic review
Oral tablets. Tablet count equals the ordered dose divided by the strength per
tablet. Split only products and tablets approved for splitting. Do not assume that
extended-release or enteric-coated formulations can be manipulated.
Practice questions
11. An oral order is 500 mg. Available immediate-release tablets contain 250
mg each and are approved for splitting into halves. How many tablets are
needed? Give the exact number.
A. 4 tablets
B. 20 tablets
C. 2 tablets
D. 1 tablets
Answer: C
Rationale: Tablets = ordered dose divided by tablet strength = 500 mg / 250 mg per
tablet. Final answer: 2 tablets.
12. An oral order is 750 mg. Available immediate-release tablets contain 250
mg each and are approved for splitting into halves. How many tablets are
needed? Give the exact number.
A. 6 tablets
B. 1.5 tablets
C. 3 tablets
D. 30 tablets
Answer: C
Rationale: Tablets = ordered dose divided by tablet strength = 750 mg / 250 mg per
tablet. Final answer: 3 tablets.
13. An oral order is 375 mg. Available immediate-release tablets contain 250
mg each and are approved for splitting into halves. How many tablets are
needed? Give the exact number.
A. 0.8 tablets
B. 3 tablets
C. 1.5 tablets
D. 15 tablets
Answer: C
Rationale: Tablets = ordered dose divided by tablet strength = 375 mg / 250 mg per
tablet. Final answer: 1.5 tablets.
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