Dosage Calculations Mastery Test Bank (2026 Edition) | 100 Questions & Answers | Nursing Math, IV Flow Rates, Medication Calculations | NCLEX-Style Practice

Dosage Calculations Mastery Test Bank
(2026 Edition)
(Inspired by Calculate with Confidence by Deborah C. Morris)

Question 1
A patient is prescribed 750 mg. Available: 250 mg/5 mL.
How many mL should be administered?

A. 5 mL
B. 10 mL
C. 15 mL
D. 20 mL

Answer: C
Rationale: (750 ÷ 250) × 5 = 15 mL

Question 2
Convert 0.25 g to mg.

A. 25 mg
B. 250 mg
C. 2500 mg
D. 0.025 mg

Answer: B
Rationale: 0.25 × 1000 = 250 mg

Question 3
Order: 1000 mg. Available: 500 mg tablets.
How many tablets?

A. 1
B. 2
C. 3
D. 0.5

Answer: B
Rationale: 1000 ÷ 500 = 2

Question 4
IV order: 1000 mL over 8 hrs.
Flow rate?

,A. 100 mL/hr
B. 110 mL/hr
C. 120 mL/hr
D. 125 mL/hr

Answer: D
Rationale: 1000 ÷ 8 = 125

Question 5
Patient weighs 60 kg. Order: 5 mg/kg.
Dose?

A. 250 mg
B. 300 mg
C. 350 mg
D. 400 mg

Answer: B
Rationale: 60 × 5 = 300 mg

Question 6
Convert 1.5 g to mg.

A. 150 mg
B. 1500 mg
C. 15,000 mg
D. 0.15 mg

Answer: B

Question 7
Available: 125 mg/5 mL. Order: 250 mg.
mL required?

A. 5 mL
B. 10 mL
C. 15 mL
D. 20 mL

Answer: B

Question 8
IV set: 15 gtt/mL. Infusion: 60 mL/hr.
gtt/min?

, A. 10
B. 15
C. 20
D. 25

Answer: B
Rationale: (60×15)/60 = 15

Question 9
Convert 500 mg to grams.

A. 0.5 g
B. 5 g
C. 50 g
D. 0.05 g

Answer: A

Question 10
Order: 2 mg. Available: 1 mg/mL.
mL?

A. 1
B. 2
C. 3
D. 4

Answer: B

Question 11
Round 3.678 to nearest tenth.

A. 3.6
B. 3.7
C. 3.68
D. 4.0

Answer: B

Question 12
Order: 0.5 mg. Available: 250 mcg tablets.
Tablets?

A. 1
B. 2