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ATI Dosage Calculation Practice Exam
2026 | 100 Questions & Answers with
Detailed Rationales | Complete Exam
Prep & Study Guide
1. A nurse is preparing to administer acetaminophen 650 mg PO. Available
tablets contain 325 mg each. How many tablets should the nurse
administer?
Answer: 2 tablets
Rationale: 650 mg ÷ 325 mg/tablet = 2 tablets.
2. A prescription reads amoxicillin 500 mg PO. The available medication is 250
mg/5 mL. How many mL should the nurse administer?
Answer: 10 mL
Rationale: (500 mg ÷ 250 mg) × 5 mL = 10 mL.
3. A client is prescribed furosemide 40 mg PO. Available tablets are 20 mg
each. How many tablets should the nurse administer?
Answer: 2 tablets
Rationale: 40 mg ÷ 20 mg/tablet = 2 tablets.
, 4. A prescription is for levothyroxine 0.075 mg PO. Available tablets are 25
mcg each. How many tablets should the nurse administer?
Answer: 3 tablets
Rationale: 0.075 mg = 75 mcg. 75 mcg ÷ 25 mcg/tablet = 3 tablets.
5. A client is prescribed digoxin 0.125 mg PO. Available tablets contain 0.25
mg. How many tablets should the nurse administer?
Answer: 0.5 tablet
Rationale: 0.125 mg ÷ 0.25 mg/tablet = 0.5 tablet.
6. A nurse needs to administer ibuprofen 400 mg PO. Available tablets contain
200 mg each. How many tablets are required?
Answer: 2 tablets
Rationale: 400 mg ÷ 200 mg/tablet = 2 tablets.
7. A prescription is for prednisone 15 mg PO. Available tablets contain 5 mg
each. How many tablets should the nurse administer?
Answer: 3 tablets
Rationale: 15 mg ÷ 5 mg/tablet = 3 tablets.
8. A child is prescribed cephalexin 375 mg PO. The medication available is 250
mg/5 mL. How many mL should be administered?
Answer: 7.5 mL
Rationale: (375 mg ÷ 250 mg) × 5 mL = 7.5 mL.
9. A prescription reads metronidazole 500 mg PO. Available tablets contain
250 mg. How many tablets should be administered?
Answer: 2 tablets
Rationale: 500 mg ÷ 250 mg/tablet = 2 tablets.
, 10.A client is prescribed potassium chloride 20 mEq PO. Available tablets
contain 10 mEq each. How many tablets should the nurse administer?
Answer: 2 tablets
Rationale: 20 mEq ÷ 10 mEq/tablet = 2 tablets.
11.A nurse must administer morphine 6 mg IV. The vial contains 10 mg/mL.
How many mL should be administered?
Answer: 0.6 mL
Rationale: 6 mg ÷ 10 mg/mL = 0.6 mL.
12.A prescription is for ondansetron 4 mg IV. Available medication is 2 mg/mL.
How many mL should the nurse administer?
Answer: 2 mL
Rationale: 4 mg ÷ 2 mg/mL = 2 mL.
13.A client weighs 154 lb. What is the client's weight in kilograms?
Answer: 70 kg
Rationale: 154 lb ÷ 2.2 lb/kg = 70 kg.
14.A child weighs 44 lb. What is the child's weight in kilograms?
Answer: 20 kg
Rationale: 44 lb ÷ 2.2 lb/kg = 20 kg.
15.A prescription is for 10 mg/kg/day of a medication for a child weighing 22
kg. The medication is prescribed once daily. How many mg should the child
receive per dose?
Answer: 220 mg
Rationale: 10 mg × 22 kg = 220 mg/day. Since it is given once daily, the dose is
220 mg.
ATI Dosage Calculation Practice Exam
2026 | 100 Questions & Answers with
Detailed Rationales | Complete Exam
Prep & Study Guide
1. A nurse is preparing to administer acetaminophen 650 mg PO. Available
tablets contain 325 mg each. How many tablets should the nurse
administer?
Answer: 2 tablets
Rationale: 650 mg ÷ 325 mg/tablet = 2 tablets.
2. A prescription reads amoxicillin 500 mg PO. The available medication is 250
mg/5 mL. How many mL should the nurse administer?
Answer: 10 mL
Rationale: (500 mg ÷ 250 mg) × 5 mL = 10 mL.
3. A client is prescribed furosemide 40 mg PO. Available tablets are 20 mg
each. How many tablets should the nurse administer?
Answer: 2 tablets
Rationale: 40 mg ÷ 20 mg/tablet = 2 tablets.
, 4. A prescription is for levothyroxine 0.075 mg PO. Available tablets are 25
mcg each. How many tablets should the nurse administer?
Answer: 3 tablets
Rationale: 0.075 mg = 75 mcg. 75 mcg ÷ 25 mcg/tablet = 3 tablets.
5. A client is prescribed digoxin 0.125 mg PO. Available tablets contain 0.25
mg. How many tablets should the nurse administer?
Answer: 0.5 tablet
Rationale: 0.125 mg ÷ 0.25 mg/tablet = 0.5 tablet.
6. A nurse needs to administer ibuprofen 400 mg PO. Available tablets contain
200 mg each. How many tablets are required?
Answer: 2 tablets
Rationale: 400 mg ÷ 200 mg/tablet = 2 tablets.
7. A prescription is for prednisone 15 mg PO. Available tablets contain 5 mg
each. How many tablets should the nurse administer?
Answer: 3 tablets
Rationale: 15 mg ÷ 5 mg/tablet = 3 tablets.
8. A child is prescribed cephalexin 375 mg PO. The medication available is 250
mg/5 mL. How many mL should be administered?
Answer: 7.5 mL
Rationale: (375 mg ÷ 250 mg) × 5 mL = 7.5 mL.
9. A prescription reads metronidazole 500 mg PO. Available tablets contain
250 mg. How many tablets should be administered?
Answer: 2 tablets
Rationale: 500 mg ÷ 250 mg/tablet = 2 tablets.
, 10.A client is prescribed potassium chloride 20 mEq PO. Available tablets
contain 10 mEq each. How many tablets should the nurse administer?
Answer: 2 tablets
Rationale: 20 mEq ÷ 10 mEq/tablet = 2 tablets.
11.A nurse must administer morphine 6 mg IV. The vial contains 10 mg/mL.
How many mL should be administered?
Answer: 0.6 mL
Rationale: 6 mg ÷ 10 mg/mL = 0.6 mL.
12.A prescription is for ondansetron 4 mg IV. Available medication is 2 mg/mL.
How many mL should the nurse administer?
Answer: 2 mL
Rationale: 4 mg ÷ 2 mg/mL = 2 mL.
13.A client weighs 154 lb. What is the client's weight in kilograms?
Answer: 70 kg
Rationale: 154 lb ÷ 2.2 lb/kg = 70 kg.
14.A child weighs 44 lb. What is the child's weight in kilograms?
Answer: 20 kg
Rationale: 44 lb ÷ 2.2 lb/kg = 20 kg.
15.A prescription is for 10 mg/kg/day of a medication for a child weighing 22
kg. The medication is prescribed once daily. How many mg should the child
receive per dose?
Answer: 220 mg
Rationale: 10 mg × 22 kg = 220 mg/day. Since it is given once daily, the dose is
220 mg.
