ATI Basic Dosage
Calculations: Comprehensive
Advanced
Practice Examination well
written one year 2025 /2026
updated graded A+150 Multiple-
Choice Questions with Detailed
Rationales
Examination Title: ATI Basic Dosage Calculations: Comprehensive Advanced Practice Examination for
Nursing Competency and Medication Safety Mastery
,Difficulty Level: Advanced / Mixed (Progressing from foundational to complex clinical application)
Target Audience: Nursing students preparing for ATI dosage calculation competency examinations,
RN candidates, and practicing nurses seeking to enhance medication calculation proficiency Total
Questions: 150
Instructions: Select the single best answer for each question. Round answers according to standard
ATI rounding rules: use a leading zero for decimal values less than 1, do not use trailing zeros, and
round to the nearest tenth unless otherwise specified.
SECTION 1: Unit Conversions and Basic Mathematics (Questions 1–15)
1. A nurse is converting a client's weight from pounds to kilograms. The client weighs 187 lb.
How many kilograms does the client weigh? (Round to the nearest tenth.)
A. 84.5 kg
B. 85.0 kg
C. 85.5 kg
D. 86.0 kg
- detailed answer 100 % correct :-B
Rationale: To convert pounds to kilograms, divide the weight in pounds by 2.2. 187 lb ÷ 2.2 = 85.0 kg.
ATI requires rounding to the nearest tenth; 85.0 is correctly expressed with a leading zero before the
decimal and no trailing zero after the tenths place.
2. A medication order is written for 0.5 g. The medication is available in 500 mg tablets. How
many tablets should the nurse administer?
A. 0.5 tablet
B. 1 tablet
C. 1.5 tablets
D. 2 tablets
,- detailed answer 100 % correct :-B
Rationale: First convert grams to milligrams: 0.5 g × 1000 mg/g = 500 mg. Then divide the desired
dose by the available dose: 500 mg ÷ 500 mg/tablet = 1 tablet.
3. A nurse needs to administer 750 mg of a medication. The available concentration is 250 mg/5
mL. How many mL should the nurse administer?
A. 10 mL
B. 12.5 mL
C. 15 mL
D. 20 mL
- detailed answer 100 % correct :-C
Rationale: Use ratio and proportion: 250 mg/5 mL = 750 mg/X mL. Cross multiply: 250X = 3750. X =
15 mL.
4. A client's intake includes 8 oz of water, 12 oz of juice, and 6 oz of soup. What is the total
intake in mL?
A. 650 mL
B. 720 mL
C. 780 mL
D. 840 mL
- detailed answer 100 % correct :-C
Rationale: Convert ounces to milliliters using the conversion 1 oz = 30 mL. Total ounces = 8 + 12 + 6
= 26 oz. 26 oz × 30 mL/oz = 780 mL.
, 5. A nurse is calculating a dosage and needs to convert 2.5 L to mL. How many mL are in 2.5 L?
A. 250 mL
B. 2,500 mL
C. 25,000 mL
D. 250,000 mL
- detailed answer 100 % correct :-B
Rationale: 1 L = 1000 mL. Therefore, 2.5 L × 1000 mL/L = 2,500 mL.
6. A medication is available in a concentration of 0.25 mg/mL. How many micrograms are in
each milliliter?
A. 25 mcg
B. 250 mcg
C. 2,500 mcg
D. 25,000 mcg
- detailed answer 100 % correct :-B
Rationale: Convert milligrams to micrograms: 0.25 mg × 1000 mcg/mg = 250 mcg.
7. A client weighs 220 lb. What is the client's weight in kilograms?
A. 99 kg
B. 100 kg
C. 101 kg
D. 110 kg
- detailed answer 100 % correct :-B
Rationale: 220 lb ÷ 2.2 = 100 kg.
Calculations: Comprehensive
Advanced
Practice Examination well
written one year 2025 /2026
updated graded A+150 Multiple-
Choice Questions with Detailed
Rationales
Examination Title: ATI Basic Dosage Calculations: Comprehensive Advanced Practice Examination for
Nursing Competency and Medication Safety Mastery
,Difficulty Level: Advanced / Mixed (Progressing from foundational to complex clinical application)
Target Audience: Nursing students preparing for ATI dosage calculation competency examinations,
RN candidates, and practicing nurses seeking to enhance medication calculation proficiency Total
Questions: 150
Instructions: Select the single best answer for each question. Round answers according to standard
ATI rounding rules: use a leading zero for decimal values less than 1, do not use trailing zeros, and
round to the nearest tenth unless otherwise specified.
SECTION 1: Unit Conversions and Basic Mathematics (Questions 1–15)
1. A nurse is converting a client's weight from pounds to kilograms. The client weighs 187 lb.
How many kilograms does the client weigh? (Round to the nearest tenth.)
A. 84.5 kg
B. 85.0 kg
C. 85.5 kg
D. 86.0 kg
- detailed answer 100 % correct :-B
Rationale: To convert pounds to kilograms, divide the weight in pounds by 2.2. 187 lb ÷ 2.2 = 85.0 kg.
ATI requires rounding to the nearest tenth; 85.0 is correctly expressed with a leading zero before the
decimal and no trailing zero after the tenths place.
2. A medication order is written for 0.5 g. The medication is available in 500 mg tablets. How
many tablets should the nurse administer?
A. 0.5 tablet
B. 1 tablet
C. 1.5 tablets
D. 2 tablets
,- detailed answer 100 % correct :-B
Rationale: First convert grams to milligrams: 0.5 g × 1000 mg/g = 500 mg. Then divide the desired
dose by the available dose: 500 mg ÷ 500 mg/tablet = 1 tablet.
3. A nurse needs to administer 750 mg of a medication. The available concentration is 250 mg/5
mL. How many mL should the nurse administer?
A. 10 mL
B. 12.5 mL
C. 15 mL
D. 20 mL
- detailed answer 100 % correct :-C
Rationale: Use ratio and proportion: 250 mg/5 mL = 750 mg/X mL. Cross multiply: 250X = 3750. X =
15 mL.
4. A client's intake includes 8 oz of water, 12 oz of juice, and 6 oz of soup. What is the total
intake in mL?
A. 650 mL
B. 720 mL
C. 780 mL
D. 840 mL
- detailed answer 100 % correct :-C
Rationale: Convert ounces to milliliters using the conversion 1 oz = 30 mL. Total ounces = 8 + 12 + 6
= 26 oz. 26 oz × 30 mL/oz = 780 mL.
, 5. A nurse is calculating a dosage and needs to convert 2.5 L to mL. How many mL are in 2.5 L?
A. 250 mL
B. 2,500 mL
C. 25,000 mL
D. 250,000 mL
- detailed answer 100 % correct :-B
Rationale: 1 L = 1000 mL. Therefore, 2.5 L × 1000 mL/L = 2,500 mL.
6. A medication is available in a concentration of 0.25 mg/mL. How many micrograms are in
each milliliter?
A. 25 mcg
B. 250 mcg
C. 2,500 mcg
D. 25,000 mcg
- detailed answer 100 % correct :-B
Rationale: Convert milligrams to micrograms: 0.25 mg × 1000 mcg/mg = 250 mcg.
7. A client weighs 220 lb. What is the client's weight in kilograms?
A. 99 kg
B. 100 kg
C. 101 kg
D. 110 kg
- detailed answer 100 % correct :-B
Rationale: 220 lb ÷ 2.2 = 100 kg.
