NCLEX-RN Dosage Calculations 2026 — 150 Original Practice Questions with Step-by-Step Solutions

NCLEX-RN Dosage Calcula ons 2026 —
150 Original Prac ce Ques ons with
Step-by-Step Solu ons

Question 1

Convert 2 g to mg.

A. 20 mg
B. 200 mg
C. 2,000 mg
D. 20,000 mg

Answer: C. 2,000 mg

Rationale: 1 g = 1,000 mg. Therefore, 2 × 1,000 = 2,000 mg.



Question 2

Convert 750 mg to g.

A. 0.075 g
B. 0.75 g
C. 7.5 g
D. 75 g

Answer: B. 0.75 g

Rationale: 750 mg ÷ 1,000 mg/g = 0.75 g.



Question 3

Convert 0.5 mg to mcg.

,A. 5 mcg
B. 50 mcg
C. 500 mcg
D. 5,000 mcg

Answer: C. 500 mcg

Rationale: 1 mg = 1,000 mcg. Therefore, 0.5 × 1,000 = 500 mcg.



Question 4

Convert 2,500 mcg to mg.

A. 0.25 mg
B. 2.5 mg
C. 25 mg
D. 250 mg

Answer: B. 2.5 mg

Rationale: 2,500 mcg ÷ 1,000 = 2.5 mg.



Question 5

A client weighs 154 lb. Convert the weight to kilograms.

A. 60 kg
B. 65 kg
C. 70 kg
D. 75 kg

Answer: C. 70 kg

Rationale: 154 lb ÷ 2.2 = 70 kg.



Question 6

Convert 45 kg to pounds.

,A. 90 lb
B. 99 lb
C. 110 lb
D. 120 lb

Answer: B. 99 lb

Rationale: 45 kg × 2.2 lb/kg = 99 lb.



Question 7

Convert 1.5 L to mL.

A. 150 mL
B. 500 mL
C. 1,050 mL
D. 1,500 mL

Answer: D. 1,500 mL

Rationale: 1 L = 1,000 mL. Therefore, 1.5 × 1,000 = 1,500 mL.



Question 8

Convert 250 mL to liters.

A. 0.025 L
B. 0.25 L
C. 2.5 L
D. 25 L

Answer: B. 0.25 L

Rationale: 250 mL ÷ 1,000 = 0.25 L.



Question 9

Convert 3 teaspoons to mL.

, A. 5 mL
B. 10 mL
C. 15 mL
D. 30 mL

Answer: C. 15 mL

Rationale: 1 teaspoon = 5 mL. Therefore, 3 × 5 = 15 mL.



Question 10

Convert 2 tablespoons to mL.

A. 10 mL
B. 15 mL
C. 20 mL
D. 30 mL

Answer: D. 30 mL

Rationale: 1 tablespoon = 15 mL. Therefore, 2 × 15 = 30 mL.



Question 11

Convert 0.25 g to mg.

A. 25 mg
B. 250 mg
C. 2,500 mg
D. 25,000 mg

Answer: B. 250 mg

Rationale: 0.25 × 1,000 = 250 mg.



Question 12

Convert 1.2 mg to mcg.