Page 1 of 42
,Page 2 of 42
Nightingale College BSN 215 HESI Dosage
Calculation Exam: 3 Exams; Questions with
Explanations & Verified Answers (Latest
2026/2027 Update)
Q1. A prescription reads: "Amoxicillin 500 mg PO every 12
hours." The available tablets are 250 mg each. How many
tablets will the nurse administer per dose?
a) 1 tablet
b) 2 tablets
c) 3 tablets
d) 4 tablets
Answer: b) 2 tablets
Rationale: 500 mg ÷ 250 mg/tablet = 2 tablets.
,Page 3 of 42
Q2. Scenario: A patient is prescribed 0.5 g of a medication.
The pharmacy sends 250 mg tablets. How many tablets should
the nurse give?
a) 1 tablet
b) 2 tablets
c) 3 tablets
d) 4 tablets
Answer: b) 2 tablets
Rationale: Convert 0.5 g to mg: 0.5 g × 1000 = 500 mg.
Then 500 mg ÷ 250 mg/tablet = 2 tablets.
Q3. Convert 2.5 L to mL.
a) 25 mL
b) 250 mL
c) 2500 mL
d) 25,000 mL
, Page 4 of 42
Answer: c) 2500 mL
Rationale: 1 L = 1000 mL, so 2.5 × 1000 = 2500 mL.
Q4. Scenario: A child weighs 22 lb. The nurse needs to convert
this to kg for a weight-based medication order. What is the
weight in kg (round to nearest tenth)?
a) 8 kg
b) 9 kg
c) 10 kg
d) 11 kg
Answer: c) 10 kg
Rationale: 22 lb ÷ 2.2 = 10 kg exactly.
Q5. A patient drank 8 oz of water. How many mL did they
drink?
a) 120 mL
b) 240 mL
,Page 2 of 42
Nightingale College BSN 215 HESI Dosage
Calculation Exam: 3 Exams; Questions with
Explanations & Verified Answers (Latest
2026/2027 Update)
Q1. A prescription reads: "Amoxicillin 500 mg PO every 12
hours." The available tablets are 250 mg each. How many
tablets will the nurse administer per dose?
a) 1 tablet
b) 2 tablets
c) 3 tablets
d) 4 tablets
Answer: b) 2 tablets
Rationale: 500 mg ÷ 250 mg/tablet = 2 tablets.
,Page 3 of 42
Q2. Scenario: A patient is prescribed 0.5 g of a medication.
The pharmacy sends 250 mg tablets. How many tablets should
the nurse give?
a) 1 tablet
b) 2 tablets
c) 3 tablets
d) 4 tablets
Answer: b) 2 tablets
Rationale: Convert 0.5 g to mg: 0.5 g × 1000 = 500 mg.
Then 500 mg ÷ 250 mg/tablet = 2 tablets.
Q3. Convert 2.5 L to mL.
a) 25 mL
b) 250 mL
c) 2500 mL
d) 25,000 mL
, Page 4 of 42
Answer: c) 2500 mL
Rationale: 1 L = 1000 mL, so 2.5 × 1000 = 2500 mL.
Q4. Scenario: A child weighs 22 lb. The nurse needs to convert
this to kg for a weight-based medication order. What is the
weight in kg (round to nearest tenth)?
a) 8 kg
b) 9 kg
c) 10 kg
d) 11 kg
Answer: c) 10 kg
Rationale: 22 lb ÷ 2.2 = 10 kg exactly.
Q5. A patient drank 8 oz of water. How many mL did they
drink?
a) 120 mL
b) 240 mL
