ATI Dosage Calculation Practice Exam 2025–2026 (Updated) – Detailed Questions, Answers & Rationales

ATI Dosage Calculation Practice Exam
Questions, DETAILED Answers &
Rationales 2025-2026 UPDATED A+
AGRADED & VERIVIED


1.What is the formula for calculating
medication dosage?
(Desired ÷ Available) × Quantity
Basic formula for dosage calculations.
2.A doctor orders 500 mg, available is 250 mg
per tablet. How many tablets do you give?
2 tablets
500 ÷ 250 = 2.
3.Order: 1 g. Available: 500 mg/tab. How
many tablets?
2 tablets
1 g = 1000 mg → 1000 ÷ 500 = 2.
4.Order: 600 mg. Available: 200 mg/5 mL.
How many mL?
15 mL
(600 ÷ 200) × 5 = 15.

,5.Order: 250 mg. Available: 125 mg/5 mL.
How many mL?
10 mL
(250 ÷ 125) × 5 = 10.
6.Order: 50 mg IV. Available: 25 mg/mL.
How many mL?
2 mL
50 ÷ 25 = 2.
7.Order: 120 mg. Available: 40 mg/mL. How
many mL?
3 mL
120 ÷ 40 = 3.
8.Order: 0.5 g. Available: 250 mg/capsule.
How many capsules?
2 capsules
0.5 g = 500 mg → 500 ÷ 250 = 2.
9.Order: 1.5 g. Available: 500 mg/tab. How
many tabs?
3 tablets
1.5 g = 1500 mg → 1500 ÷ 500 = 3.
10. Order: 2 mg. Available: 1 mg/mL. How
many mL?

, 2 mL
2 ÷ 1 = 2.
11. Convert 1 L to mL.
1000 mL
Standard conversion.
12. Convert 0.25 L to mL.
250 mL
0.25 × 1000 = 250.
13. Convert 500 mcg to mg.
0.5 mg
1000 mcg = 1 mg.
14. Convert 2 g to mg.
2000 mg
1 g = 1000 mg.
15. Convert 0.75 g to mg.
750 mg
Multiply by 1000.
16. Convert 1250 mg to g.
1.25 g
Divide by 1000.
17. Order: 1.2 g. Available: 400 mg/tab.
How many tablets?