ATI DOSAGE CALCULATIONS 2026/2027 – EXAM QUESTIONS
AND CORRECT ANSWERS (VERIFIED ANSWERS) PLUS
RATIONALE | 2027 Q&A | INSTANT DOWNLOAD PDF
1. A medication is prescribed at 500 mg, and each tablet contains 250 mg. How
many tablets should the nurse administer?
A. 0.5 tablet
B. 2 tablets
C. 2.5 tablets
D. 5 tablets
Rationale: The prescribed dose is 500 mg and each tablet contains 250 mg. Dividing 500 mg by
250 mg gives 2 tablets.
2. A prescription reads 750 mg of a medication. The available tablets contain 500
mg each. How many tablets should be administered?
A. 0.5 tablet
B. 1 tablet
C. 1.5 tablets
D. 2 tablets
Rationale: Divide the prescribed dose by the dose available: 750 mg ÷ 500 mg/tablet = 1.5
tablets.
3. A client is prescribed 1,000 mg of acetaminophen. The available medication
contains 500 mg per tablet. How many tablets are required?
A. 2 tablets
B. 1 tablet
C. 1.5 tablets
D. 2.5 tablets
Rationale: The required number of tablets is 1,000 mg ÷ 500 mg per tablet = 2 tablets.
, 4. A medication is available as 125 mg per 5 mL. The prescription is for 250 mg.
How many milliliters should the nurse administer?
A. 5 mL
B. 10 mL
C. 15 mL
D. 20 mL
Rationale: The concentration is 125 mg in 5 mL. Because 250 mg is twice 125 mg, the volume is
twice 5 mL, or 10 mL.
5. The provider prescribes 300 mg of a medication. The pharmacy supplies 150
mg/5 mL. How many milliliters should be administered?
A. 5 mL
B. 7.5 mL
C. 8 mL
D. 10 mL
Rationale: Set up the proportion 150 mg/5 mL = 300 mg/x mL. Since 300 mg is twice 150 mg,
the required volume is 10 mL.
6. A client needs 75 mg of a medication. The available solution contains 50 mg/mL.
How many milliliters should be administered?
A. 0.5 mL
B. 1 mL
C. 1.5 mL
D. 2 mL
Rationale: Divide the prescribed dose by the concentration: 75 mg ÷ 50 mg/mL = 1.5 mL.
7. A medication order is written for 0.25 g. How many milligrams does this
represent?
A. 25 mg
,B. 250 mg
C. 2,500 mg
D. 25,000 mg
Rationale: One gram equals 1,000 mg. Therefore, 0.25 g × 1,000 = 250 mg.
8. The prescribed dose is 1.5 g. The medication is available in milligrams. What is
the equivalent dose?
A. 15 mg
B. 150 mg
C. 1500 mg
D. 1,500 mg
Rationale: One gram equals 1,000 mg, so 1.5 g equals 1,500 mg.
9. A nurse must administer 0.75 mg of a medication. The available tablets contain
0.25 mg each. How many tablets should be given?
A. 3 tablets
B. 2 tablets
C. 1.5 tablets
D. 0.75 tablet
Rationale: Divide 0.75 mg by 0.25 mg per tablet. The result is 3 tablets.
10. A prescription requires 2,500 mcg of a medication. How many milligrams is this
dose?
A. 0.25 mg
B. 1 mg
C. 2.5 mg
D. 25 mg
Rationale: There are 1,000 mcg in 1 mg. Therefore, 2,500 mcg ÷ 1,000 = 2.5 mg.
, 11. A medication is supplied as 400 mg in 2 mL. The prescribed dose is 200 mg.
How many milliliters should be administered?
A. 0.5 mL
B. 1 mL
C. 1.5 mL
D. 2 mL
Rationale: The concentration is 200 mg/mL. A 200-mg dose therefore requires 1 mL.
12. The nurse is preparing 0.4 mg of a medication. The vial contains 0.8 mg/mL.
What volume should be drawn up?
A. 0.25 mL
B. 0.4 mL
C. 0.8 mL
D. 0.5 mL
Rationale: Divide the prescribed dose by the concentration: 0.4 mg ÷ 0.8 mg/mL = 0.5 mL.
13. A client is prescribed 45 mg of a medication. The medication is available as 15
mg/5 mL. How much should the nurse administer?
A. 5 mL
B. 10 mL
C. 15 mL
D. 20 mL
Rationale: The concentration provides 15 mg in 5 mL. A 45-mg dose is three times 15 mg,
requiring 15 mL.
14. A tablet contains 0.125 mg of digoxin. The prescribed dose is 0.25 mg. How
many tablets should be administered?
A. 0.5 tablet
B. 1 tablet
AND CORRECT ANSWERS (VERIFIED ANSWERS) PLUS
RATIONALE | 2027 Q&A | INSTANT DOWNLOAD PDF
1. A medication is prescribed at 500 mg, and each tablet contains 250 mg. How
many tablets should the nurse administer?
A. 0.5 tablet
B. 2 tablets
C. 2.5 tablets
D. 5 tablets
Rationale: The prescribed dose is 500 mg and each tablet contains 250 mg. Dividing 500 mg by
250 mg gives 2 tablets.
2. A prescription reads 750 mg of a medication. The available tablets contain 500
mg each. How many tablets should be administered?
A. 0.5 tablet
B. 1 tablet
C. 1.5 tablets
D. 2 tablets
Rationale: Divide the prescribed dose by the dose available: 750 mg ÷ 500 mg/tablet = 1.5
tablets.
3. A client is prescribed 1,000 mg of acetaminophen. The available medication
contains 500 mg per tablet. How many tablets are required?
A. 2 tablets
B. 1 tablet
C. 1.5 tablets
D. 2.5 tablets
Rationale: The required number of tablets is 1,000 mg ÷ 500 mg per tablet = 2 tablets.
, 4. A medication is available as 125 mg per 5 mL. The prescription is for 250 mg.
How many milliliters should the nurse administer?
A. 5 mL
B. 10 mL
C. 15 mL
D. 20 mL
Rationale: The concentration is 125 mg in 5 mL. Because 250 mg is twice 125 mg, the volume is
twice 5 mL, or 10 mL.
5. The provider prescribes 300 mg of a medication. The pharmacy supplies 150
mg/5 mL. How many milliliters should be administered?
A. 5 mL
B. 7.5 mL
C. 8 mL
D. 10 mL
Rationale: Set up the proportion 150 mg/5 mL = 300 mg/x mL. Since 300 mg is twice 150 mg,
the required volume is 10 mL.
6. A client needs 75 mg of a medication. The available solution contains 50 mg/mL.
How many milliliters should be administered?
A. 0.5 mL
B. 1 mL
C. 1.5 mL
D. 2 mL
Rationale: Divide the prescribed dose by the concentration: 75 mg ÷ 50 mg/mL = 1.5 mL.
7. A medication order is written for 0.25 g. How many milligrams does this
represent?
A. 25 mg
,B. 250 mg
C. 2,500 mg
D. 25,000 mg
Rationale: One gram equals 1,000 mg. Therefore, 0.25 g × 1,000 = 250 mg.
8. The prescribed dose is 1.5 g. The medication is available in milligrams. What is
the equivalent dose?
A. 15 mg
B. 150 mg
C. 1500 mg
D. 1,500 mg
Rationale: One gram equals 1,000 mg, so 1.5 g equals 1,500 mg.
9. A nurse must administer 0.75 mg of a medication. The available tablets contain
0.25 mg each. How many tablets should be given?
A. 3 tablets
B. 2 tablets
C. 1.5 tablets
D. 0.75 tablet
Rationale: Divide 0.75 mg by 0.25 mg per tablet. The result is 3 tablets.
10. A prescription requires 2,500 mcg of a medication. How many milligrams is this
dose?
A. 0.25 mg
B. 1 mg
C. 2.5 mg
D. 25 mg
Rationale: There are 1,000 mcg in 1 mg. Therefore, 2,500 mcg ÷ 1,000 = 2.5 mg.
, 11. A medication is supplied as 400 mg in 2 mL. The prescribed dose is 200 mg.
How many milliliters should be administered?
A. 0.5 mL
B. 1 mL
C. 1.5 mL
D. 2 mL
Rationale: The concentration is 200 mg/mL. A 200-mg dose therefore requires 1 mL.
12. The nurse is preparing 0.4 mg of a medication. The vial contains 0.8 mg/mL.
What volume should be drawn up?
A. 0.25 mL
B. 0.4 mL
C. 0.8 mL
D. 0.5 mL
Rationale: Divide the prescribed dose by the concentration: 0.4 mg ÷ 0.8 mg/mL = 0.5 mL.
13. A client is prescribed 45 mg of a medication. The medication is available as 15
mg/5 mL. How much should the nurse administer?
A. 5 mL
B. 10 mL
C. 15 mL
D. 20 mL
Rationale: The concentration provides 15 mg in 5 mL. A 45-mg dose is three times 15 mg,
requiring 15 mL.
14. A tablet contains 0.125 mg of digoxin. The prescribed dose is 0.25 mg. How
many tablets should be administered?
A. 0.5 tablet
B. 1 tablet
