ATI Medication Administration (Dosage Calculation)
Practice Exam/ Questions with Correct Verified Answers
– Latest Update 2026.
1. The nurse is preparing to administer 0.5 grams of a
medication. How many milligrams is this equivalent to?
A. 50 mg
B. 500 mg
C. 5000 mg
D. 5 mg
Answer: B
Rationale: 1 gram = 1000 milligrams. 0.5 grams × 1000 mg/g
= 500 mg. The nurse should recall that moving the decimal point
three places to the right converts grams to milligrams.
2. A medication order reads "Amoxicillin 250 mg." The available
medication is 500 mg per tablet. How many tablets will the nurse
administer?
1
,A. 0.5 tablet
B. 1 tablet
C. 1.5 tablets
D. 2 tablets
Answer: A
Rationale: Using ratio/proportion: 500 mg/1 tablet = 250 mg/X
tablets. Cross multiply: 500X = 250. X = 0.5 tablet. The nurse
should administer one-half tablet.
3. The nurse is converting 2.5 liters to milliliters. How many
milliliters is this?
A. 25 mL
B. 250 mL
C. 2500 mL
D. 25,000 mL
Answer: C
Rationale: 1 liter = 1000 milliliters. 2.5 L × 1000 mL/L = 2500
mL. The decimal point is moved three places to the right.
2
,4. A patient is prescribed 0.05 grams of a medication. How
many milligrams should the nurse administer?
A. 0.5 mg
B. 5 mg
C. 50 mg
D. 500 mg
Answer: C
Rationale: 0.05 grams × 1000 mg/g = 50 mg. The decimal is
moved three places to the right (0.05 → 50).
5. The nurse has a medication available as 250 mg per 5 mL.
The order is for 375 mg. How many mL will the nurse administer?
A. 5 mL
B. 7.5 mL
C. 10 mL
D. 12.5 mL
3
, Answer: B
Rationale: 250 mg/5 mL = 375 mg/X mL. Cross multiply: 250X
= 1875. X = 7.5 mL. The nurse should administer 7.5 mL.
6. The nurse is preparing to administer 1.5 teaspoons of a liquid
medication. How many milliliters is this equivalent to?
A. 2.5 mL
B. 5 mL
C. 7.5 mL
D. 10 mL
Answer: C
Rationale: 1 teaspoon = 5 mL. 1.5 teaspoons × 5 mL/tsp = 7.5
mL. This is a common conversion used in medication
administration.
7. A patient is prescribed 30 mg of a medication. The available
concentration is 10 mg/mL. How many mL will the nurse
administer?
A. 2 mL
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Practice Exam/ Questions with Correct Verified Answers
– Latest Update 2026.
1. The nurse is preparing to administer 0.5 grams of a
medication. How many milligrams is this equivalent to?
A. 50 mg
B. 500 mg
C. 5000 mg
D. 5 mg
Answer: B
Rationale: 1 gram = 1000 milligrams. 0.5 grams × 1000 mg/g
= 500 mg. The nurse should recall that moving the decimal point
three places to the right converts grams to milligrams.
2. A medication order reads "Amoxicillin 250 mg." The available
medication is 500 mg per tablet. How many tablets will the nurse
administer?
1
,A. 0.5 tablet
B. 1 tablet
C. 1.5 tablets
D. 2 tablets
Answer: A
Rationale: Using ratio/proportion: 500 mg/1 tablet = 250 mg/X
tablets. Cross multiply: 500X = 250. X = 0.5 tablet. The nurse
should administer one-half tablet.
3. The nurse is converting 2.5 liters to milliliters. How many
milliliters is this?
A. 25 mL
B. 250 mL
C. 2500 mL
D. 25,000 mL
Answer: C
Rationale: 1 liter = 1000 milliliters. 2.5 L × 1000 mL/L = 2500
mL. The decimal point is moved three places to the right.
2
,4. A patient is prescribed 0.05 grams of a medication. How
many milligrams should the nurse administer?
A. 0.5 mg
B. 5 mg
C. 50 mg
D. 500 mg
Answer: C
Rationale: 0.05 grams × 1000 mg/g = 50 mg. The decimal is
moved three places to the right (0.05 → 50).
5. The nurse has a medication available as 250 mg per 5 mL.
The order is for 375 mg. How many mL will the nurse administer?
A. 5 mL
B. 7.5 mL
C. 10 mL
D. 12.5 mL
3
, Answer: B
Rationale: 250 mg/5 mL = 375 mg/X mL. Cross multiply: 250X
= 1875. X = 7.5 mL. The nurse should administer 7.5 mL.
6. The nurse is preparing to administer 1.5 teaspoons of a liquid
medication. How many milliliters is this equivalent to?
A. 2.5 mL
B. 5 mL
C. 7.5 mL
D. 10 mL
Answer: C
Rationale: 1 teaspoon = 5 mL. 1.5 teaspoons × 5 mL/tsp = 7.5
mL. This is a common conversion used in medication
administration.
7. A patient is prescribed 30 mg of a medication. The available
concentration is 10 mg/mL. How many mL will the nurse
administer?
A. 2 mL
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