,WGU D441 Verified Exam Prep, Calculation
Workbook & 150 Original Practice Questions
— Medical Dosage Calculations &
Pharmacology | Western Governors University
| Q & A | 2026/2027 Edition
1. A client is prescribed 500 mg of medication PO. The pharmacy supplies 250 mg tablets. How
many tablets should the nurse administer?
A. 1 tablet
B. 1.5 tablets
C. 2 tablets
D. 2.5 tablets
Correct Answer: C. 2 tablets
Rationale: Use the formula: (Ordered ÷ Have) × Quantity = (500 mg ÷ 250 mg) × 1 tablet = 2
tablets.
2. A provider orders 1,000 mL of 0.9% NaCl to infuse over 8 hours. The nurse should set the IV
pump to deliver how many mL/hr?
,A. 100 mL/hr
B. 125 mL/hr
C. 150 mL/hr
D. 200 mL/hr
Correct Answer: B. 125 mL/hr
Rationale: Total volume ÷ Time (hr) = 1,000 mL ÷ 8 hr = 125 mL/hr.
3. A client weighs 154 lb. What is the client's weight in kilograms? (Round to the nearest tenth.)
A. 60 kg
B. 65 kg
C. 70 kg
D. 75 kg
Correct Answer: C. 70 kg
Rationale: 1 kg = 2.2 lb. 154 lb ÷ 2.2 = 70 kg.
4. A medication is ordered at 0.5 mg/kg/day for a child weighing 44 lb. How many mg should
the child receive per day?
, A. 5 mg
B. 10 mg
C. 15 mg
D. 20 mg
Correct Answer: B. 10 mg
Rationale: Convert weight: 44 lb ÷ 2.2 = 20 kg. Then: 0.5 mg × 20 kg = 10 mg/day.
5. A client is prescribed 750 mg of medication IV. The vial contains 1 g of powder. After
reconstitution with 5 mL of diluent, the concentration is 1 g/5 mL. How many mL should the
nurse administer?
A. 2.5 mL
B. 3 mL
C. 3.75 mL
D. 5 mL
Correct Answer: C. 3.75 mL
Rationale: Convert 1 g = 1,000 mg. (750 mg ÷ 1,000 mg) × 5 mL = 3.75 mL.
Workbook & 150 Original Practice Questions
— Medical Dosage Calculations &
Pharmacology | Western Governors University
| Q & A | 2026/2027 Edition
1. A client is prescribed 500 mg of medication PO. The pharmacy supplies 250 mg tablets. How
many tablets should the nurse administer?
A. 1 tablet
B. 1.5 tablets
C. 2 tablets
D. 2.5 tablets
Correct Answer: C. 2 tablets
Rationale: Use the formula: (Ordered ÷ Have) × Quantity = (500 mg ÷ 250 mg) × 1 tablet = 2
tablets.
2. A provider orders 1,000 mL of 0.9% NaCl to infuse over 8 hours. The nurse should set the IV
pump to deliver how many mL/hr?
,A. 100 mL/hr
B. 125 mL/hr
C. 150 mL/hr
D. 200 mL/hr
Correct Answer: B. 125 mL/hr
Rationale: Total volume ÷ Time (hr) = 1,000 mL ÷ 8 hr = 125 mL/hr.
3. A client weighs 154 lb. What is the client's weight in kilograms? (Round to the nearest tenth.)
A. 60 kg
B. 65 kg
C. 70 kg
D. 75 kg
Correct Answer: C. 70 kg
Rationale: 1 kg = 2.2 lb. 154 lb ÷ 2.2 = 70 kg.
4. A medication is ordered at 0.5 mg/kg/day for a child weighing 44 lb. How many mg should
the child receive per day?
, A. 5 mg
B. 10 mg
C. 15 mg
D. 20 mg
Correct Answer: B. 10 mg
Rationale: Convert weight: 44 lb ÷ 2.2 = 20 kg. Then: 0.5 mg × 20 kg = 10 mg/day.
5. A client is prescribed 750 mg of medication IV. The vial contains 1 g of powder. After
reconstitution with 5 mL of diluent, the concentration is 1 g/5 mL. How many mL should the
nurse administer?
A. 2.5 mL
B. 3 mL
C. 3.75 mL
D. 5 mL
Correct Answer: C. 3.75 mL
Rationale: Convert 1 g = 1,000 mg. (750 mg ÷ 1,000 mg) × 5 mL = 3.75 mL.
