Page 1 of 37
Clear and Simple A Guide to Medication
Classifications and Dosage Calculations,
5th Edition by Cynthia J. Watkins and Amy
Blades
1. Convert 2.5 grams to milligrams.
A) 250 mg
B) 2500 mg
C) 25 mg
D) 0.25 mg
Answer: B
*Rationale: 1 g = 1000 mg; therefore 2.5 g × 1000 = 2500
mg.*
2. How many milliliters are in 3.5 liters?
A) 35 mL
,Page 2 of 37
B) 350 mL
C) 3500 mL
D) 35,000 mL
Answer: C
*Rationale: 1 L = 1000 mL; 3.5 L × 1000 = 3500 mL.*
3. A patient weighs 180 lb. What is the weight in kilograms?
(Round to nearest tenth.)
A) 81.8 kg
B) 82.0 kg
C) 80.0 kg
D) 79.5 kg
Answer: A
*Rationale: 1 kg = 2.2 lb; 180 ÷ 2.2 = 81.818 → 81.8 kg.*
4. Convert 0.05 mg to micrograms.
A) 5 mcg
B) 50 mcg
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C) 500 mcg
D) 5000 mcg
Answer: B
*Rationale: 1 mg = 1000 mcg; 0.05 × 1000 = 50 mcg.*
5. A liquid medication has a concentration of 250 mg/5 mL.
How many milligrams are in 1 mL?
A) 25 mg
B) 50 mg
C) 125 mg
D) 250 mg
Answer: B
*Rationale: 250 mg ÷ 5 mL = 50 mg/mL.*
6. Convert 1/150 to a decimal (rounded to four decimal
places).
A) 0.0067
B) 0.0070
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C) 0.0667
D) 0.6667
Answer: A
*Rationale: 1 ÷ 150 = 0.006666… rounded to 0.0067.*
7. A patient drank 8 oz of water. How many milliliters is this?
A) 120 mL
B) 240 mL
C) 480 mL
D) 960 mL
Answer: B
*Rationale: 1 oz = 30 mL; 8 × 30 = 240 mL.*
8. Which of the following is the largest volume?
A) 0.5 L
B) 500 mL
C) 5000 mL
D) 0.05 L
Clear and Simple A Guide to Medication
Classifications and Dosage Calculations,
5th Edition by Cynthia J. Watkins and Amy
Blades
1. Convert 2.5 grams to milligrams.
A) 250 mg
B) 2500 mg
C) 25 mg
D) 0.25 mg
Answer: B
*Rationale: 1 g = 1000 mg; therefore 2.5 g × 1000 = 2500
mg.*
2. How many milliliters are in 3.5 liters?
A) 35 mL
,Page 2 of 37
B) 350 mL
C) 3500 mL
D) 35,000 mL
Answer: C
*Rationale: 1 L = 1000 mL; 3.5 L × 1000 = 3500 mL.*
3. A patient weighs 180 lb. What is the weight in kilograms?
(Round to nearest tenth.)
A) 81.8 kg
B) 82.0 kg
C) 80.0 kg
D) 79.5 kg
Answer: A
*Rationale: 1 kg = 2.2 lb; 180 ÷ 2.2 = 81.818 → 81.8 kg.*
4. Convert 0.05 mg to micrograms.
A) 5 mcg
B) 50 mcg
,Page 3 of 37
C) 500 mcg
D) 5000 mcg
Answer: B
*Rationale: 1 mg = 1000 mcg; 0.05 × 1000 = 50 mcg.*
5. A liquid medication has a concentration of 250 mg/5 mL.
How many milligrams are in 1 mL?
A) 25 mg
B) 50 mg
C) 125 mg
D) 250 mg
Answer: B
*Rationale: 250 mg ÷ 5 mL = 50 mg/mL.*
6. Convert 1/150 to a decimal (rounded to four decimal
places).
A) 0.0067
B) 0.0070
, Page 4 of 37
C) 0.0667
D) 0.6667
Answer: A
*Rationale: 1 ÷ 150 = 0.006666… rounded to 0.0067.*
7. A patient drank 8 oz of water. How many milliliters is this?
A) 120 mL
B) 240 mL
C) 480 mL
D) 960 mL
Answer: B
*Rationale: 1 oz = 30 mL; 8 × 30 = 240 mL.*
8. Which of the following is the largest volume?
A) 0.5 L
B) 500 mL
C) 5000 mL
D) 0.05 L
