BSN HESI 215 DOSAGE CALCULATION EXAM V2
2026/2027 | Updated | Nightingale Grade A
Validation | Questions & Answers | Pass Guaranteed -
A+ Graded
Section V2-A: Advanced Conversion Systems & Complex
Fractions - Q1-30
Q1. A patient is prescribed 1.25 g of a medication, but the pharmacy only has 500
mg tablets available. How many tablets should the nurse administer?
A. 1.5 tablets
B. 2 tablets
C. 2.5 tablets
D. 3 tablets
C. 2.5 tablets [CORRECT]
Rationale: Convert 1.25 g to 1,250 mg. Divide by 500 mg/tablet = 2.5 tablets. A is
incorrect (1.5 × 500 = 750 mg). B is incorrect (2 × 500 = 1,000 mg). D is incorrect (3 ×
500 = 1,500 mg, exceeding the prescribed dose).
Correct Answer: C
Q2. A pediatric patient weighs 44 lb. The medication order is for 0.5 mg/kg. How
many mg should the nurse administer? (Round to nearest tenth.)
A. 9.8 mg
B. 10.0 mg
C. 10.2 mg
D. 11.0 mg
,B. 10.0 mg [CORRECT]
Rationale: Convert 44 lb ÷ 2.205 = 19.95 kg ≈ 20.0 kg. Multiply 20.0 kg × 0.5 mg/kg
= 10.0 mg. A is incorrect (used 2.2 divisor with rounding error). C is incorrect (used 44
÷ 2.2 = 20.4 kg × 0.5 = 10.2 mg, but 2.205 is more precise). D is incorrect (used 2.0
lb/kg conversion).
Correct Answer: B
Q3. The provider orders 0.75 g of a drug. The available concentration is 250 mg/5
mL. How many mL should the nurse administer?
A. 12.5 mL
B. 15 mL
C. 18.75 mL
D. 20 mL
B. 15 mL [CORRECT]
Rationale: Convert 0.75 g = 750 mg. Using ratio proportion: 250 mg/5 mL = 750
mg/X mL. Cross-multiply: 250X = 3,750 → X = 15 mL. A is incorrect (used 500 mg
instead of 750 mg). C is incorrect (calculation error: 750 ÷ 250 = 3, then 3 × 5 = 15,
not 18.75). D is incorrect (used 1 g = 1,000 mg ÷ 250 × 5 = 20).
Correct Answer: B
Q4. A patient requires 2.5 mcg of medication. The available stock is 0.05 mg/mL. How
many mL should the nurse administer?
A. 0.025 mL
B. 0.05 mL
C. 0.5 mL
D. 5.0 mL
B. 0.05 mL [CORRECT]
Rationale: Convert 0.05 mg = 50 mcg. Using D/H × V: 2.5 mcg ÷ 50 mcg/mL = 0.05
mL. A is incorrect (divided by 100 instead of converting properly). C is incorrect
,(failed to convert mg to mcg, treating as 2.5 ÷ 5 = 0.5). D is incorrect (inverted the
calculation).
Correct Answer: B
Q5. The order reads: "Give gr 1/150 of medication PO." The available tablets are 0.4
mg each. How many tablets should the nurse administer?
A. 0.5 tablet
B. 1 tablet
C. 1.5 tablets
D. 2 tablets
B. 1 tablet [CORRECT]
Rationale: Convert gr 1/150 to mg: 1 gr = 60 mg, so 1/150 gr = 60/150 = 0.4 mg.
One 0.4 mg tablet = exact dose. A is incorrect (used 1 gr = 65 mg: 65/150 = 0.433
mg, then rounded down incorrectly). C is incorrect (calculation error). D is incorrect
(doubled the dose).
Correct Answer: B
Q6. A medication is ordered at 0.3 g. The available concentration is 150 mg/mL. How
many mL should the nurse draw up?
A. 1.5 mL
B. 2.0 mL
C. 2.5 mL
D. 3.0 mL
B. 2.0 mL [CORRECT]
Rationale: Convert 0.3 g = 300 mg. 300 mg ÷ 150 mg/mL = 2.0 mL. A is incorrect
(used 0.3 g as 300 mg but divided by 200 mg/mL). C is incorrect (added 0.5 mL
buffer). D is incorrect (used 0.3 g as 300 mg but multiplied by 0.01).
Correct Answer: B
, Q7. A patient weighs 176 lb. The order is for 5 mcg/kg/min. How many mcg/min
should the patient receive?
A. 380 mcg/min
B. 400 mcg/min
C. 420 mcg/min
D. 440 mcg/min
B. 400 mcg/min [CORRECT]
Rationale: Convert 176 lb ÷ 2.2 = 80 kg. 80 kg × 5 mcg/kg/min = 400 mcg/min. A is
incorrect (used 2.205 divisor: 176 ÷ 2.205 = 79.8 kg, then 79.8 × 5 = 399 ≈ 380 with
error). C is incorrect (used 84 kg). D is incorrect (used 88 kg or 176 ÷ 2.0).
Correct Answer: B
Q8. The order is for 1,500 units of heparin subcutaneously. The available
concentration is 5,000 units/mL. How many mL should the nurse administer?
A. 0.2 mL
B. 0.25 mL
C. 0.3 mL
D. 0.5 mL
C. 0.3 mL [CORRECT]
Rationale: 1,500 units ÷ 5,000 units/mL = 0.3 mL. A is incorrect (used 1,000 units
instead of 1,500). B is incorrect (used 1,250 units). D is incorrect (used 2,500 units or
halved the concentration).
Correct Answer: C
Q9. A medication is ordered at 75 mg. The available tablets are gr ss (gr 1/2). How
many tablets should the nurse administer?
2026/2027 | Updated | Nightingale Grade A
Validation | Questions & Answers | Pass Guaranteed -
A+ Graded
Section V2-A: Advanced Conversion Systems & Complex
Fractions - Q1-30
Q1. A patient is prescribed 1.25 g of a medication, but the pharmacy only has 500
mg tablets available. How many tablets should the nurse administer?
A. 1.5 tablets
B. 2 tablets
C. 2.5 tablets
D. 3 tablets
C. 2.5 tablets [CORRECT]
Rationale: Convert 1.25 g to 1,250 mg. Divide by 500 mg/tablet = 2.5 tablets. A is
incorrect (1.5 × 500 = 750 mg). B is incorrect (2 × 500 = 1,000 mg). D is incorrect (3 ×
500 = 1,500 mg, exceeding the prescribed dose).
Correct Answer: C
Q2. A pediatric patient weighs 44 lb. The medication order is for 0.5 mg/kg. How
many mg should the nurse administer? (Round to nearest tenth.)
A. 9.8 mg
B. 10.0 mg
C. 10.2 mg
D. 11.0 mg
,B. 10.0 mg [CORRECT]
Rationale: Convert 44 lb ÷ 2.205 = 19.95 kg ≈ 20.0 kg. Multiply 20.0 kg × 0.5 mg/kg
= 10.0 mg. A is incorrect (used 2.2 divisor with rounding error). C is incorrect (used 44
÷ 2.2 = 20.4 kg × 0.5 = 10.2 mg, but 2.205 is more precise). D is incorrect (used 2.0
lb/kg conversion).
Correct Answer: B
Q3. The provider orders 0.75 g of a drug. The available concentration is 250 mg/5
mL. How many mL should the nurse administer?
A. 12.5 mL
B. 15 mL
C. 18.75 mL
D. 20 mL
B. 15 mL [CORRECT]
Rationale: Convert 0.75 g = 750 mg. Using ratio proportion: 250 mg/5 mL = 750
mg/X mL. Cross-multiply: 250X = 3,750 → X = 15 mL. A is incorrect (used 500 mg
instead of 750 mg). C is incorrect (calculation error: 750 ÷ 250 = 3, then 3 × 5 = 15,
not 18.75). D is incorrect (used 1 g = 1,000 mg ÷ 250 × 5 = 20).
Correct Answer: B
Q4. A patient requires 2.5 mcg of medication. The available stock is 0.05 mg/mL. How
many mL should the nurse administer?
A. 0.025 mL
B. 0.05 mL
C. 0.5 mL
D. 5.0 mL
B. 0.05 mL [CORRECT]
Rationale: Convert 0.05 mg = 50 mcg. Using D/H × V: 2.5 mcg ÷ 50 mcg/mL = 0.05
mL. A is incorrect (divided by 100 instead of converting properly). C is incorrect
,(failed to convert mg to mcg, treating as 2.5 ÷ 5 = 0.5). D is incorrect (inverted the
calculation).
Correct Answer: B
Q5. The order reads: "Give gr 1/150 of medication PO." The available tablets are 0.4
mg each. How many tablets should the nurse administer?
A. 0.5 tablet
B. 1 tablet
C. 1.5 tablets
D. 2 tablets
B. 1 tablet [CORRECT]
Rationale: Convert gr 1/150 to mg: 1 gr = 60 mg, so 1/150 gr = 60/150 = 0.4 mg.
One 0.4 mg tablet = exact dose. A is incorrect (used 1 gr = 65 mg: 65/150 = 0.433
mg, then rounded down incorrectly). C is incorrect (calculation error). D is incorrect
(doubled the dose).
Correct Answer: B
Q6. A medication is ordered at 0.3 g. The available concentration is 150 mg/mL. How
many mL should the nurse draw up?
A. 1.5 mL
B. 2.0 mL
C. 2.5 mL
D. 3.0 mL
B. 2.0 mL [CORRECT]
Rationale: Convert 0.3 g = 300 mg. 300 mg ÷ 150 mg/mL = 2.0 mL. A is incorrect
(used 0.3 g as 300 mg but divided by 200 mg/mL). C is incorrect (added 0.5 mL
buffer). D is incorrect (used 0.3 g as 300 mg but multiplied by 0.01).
Correct Answer: B
, Q7. A patient weighs 176 lb. The order is for 5 mcg/kg/min. How many mcg/min
should the patient receive?
A. 380 mcg/min
B. 400 mcg/min
C. 420 mcg/min
D. 440 mcg/min
B. 400 mcg/min [CORRECT]
Rationale: Convert 176 lb ÷ 2.2 = 80 kg. 80 kg × 5 mcg/kg/min = 400 mcg/min. A is
incorrect (used 2.205 divisor: 176 ÷ 2.205 = 79.8 kg, then 79.8 × 5 = 399 ≈ 380 with
error). C is incorrect (used 84 kg). D is incorrect (used 88 kg or 176 ÷ 2.0).
Correct Answer: B
Q8. The order is for 1,500 units of heparin subcutaneously. The available
concentration is 5,000 units/mL. How many mL should the nurse administer?
A. 0.2 mL
B. 0.25 mL
C. 0.3 mL
D. 0.5 mL
C. 0.3 mL [CORRECT]
Rationale: 1,500 units ÷ 5,000 units/mL = 0.3 mL. A is incorrect (used 1,000 units
instead of 1,500). B is incorrect (used 1,250 units). D is incorrect (used 2,500 units or
halved the concentration).
Correct Answer: C
Q9. A medication is ordered at 75 mg. The available tablets are gr ss (gr 1/2). How
many tablets should the nurse administer?
