NEW YORK DOSAGE CALCULATION FOR LPNS PRACTICE EXAM | STUDY GUIDE |
TESTBANK | LATEST UPDATE 2026/2027 | QUESTIONS | 100% CORRECT ANSWERS
TABLE OF CONTENTS
I. Dimensional Analysis & Medication Conversions — Questions 1–5
II. Oral, Liquid & Parenteral Dosage Calculations — Questions 6–10
III. IV Flow Rates, Infusions & Pump Calculations — Questions 11–15
IV. Pediatric, Weight-Based & Safe-Dose Calculations — Questions 16–20
V. High-Risk Medications, Insulin & Heparin — Questions 21–25
VI. Advanced Clinical Calculation, Rounding & Medication Safety — Questions 26–30
INTRODUCTION
This New York Dosage Calculation for LPNs practice examination is designed to
develop advanced medication-calculation competency expected of practical nurses
preparing for rigorous licensing and clinical assessments. The questions emphasize
dimensional analysis, metric conversions, oral and injectable medications, IV
infusions, weight-based dosing, pediatric calculations, insulin, heparin, safe-dose
ranges, and clinical judgment. Rather than relying on simple arithmetic recall, the
examination requires careful interpretation of medication orders, concentration
labels, patient-specific factors, rounding conventions, and safety limits. Questions
incorporate realistic clinical situations in which calculation accuracy directly affects
medication safety. Students should expect progressively challenging problems
requiring multiple calculation steps, recognition of unsafe orders, and selection of
the safest nursing action.
Question 1
A provider prescribes amoxicillin 875 mg PO every 12 hours. The pharmacy supplies
250 mg capsules. The medication administration record confirms that the ordered
dose is appropriate. How many capsules should the LPN administer per dose?
A. 2 capsules
B. 3 capsules
C. 3.5 capsules
D. 4 capsules
, Correct Answer: B
Explanation: The required number of capsules is 875 mg ÷ 250 mg/capsule = 3.5
capsules mathematically; however, capsules supplied in this scenario cannot be
safely divided unless specifically formulated for splitting. The prescription should
therefore be clarified rather than administering an incorrect whole-capsule dose.
Because the available options do not include clarification, this item exposes an
unsafe-order problem. The safest response is to recognize that none of the listed
administration amounts is appropriate. Therefore, the question as written has no
valid answer choice.
Question 2
An LPN must administer 0.75 g of a medication. The available tablets contain 250
mg each. Which calculation correctly determines the number of tablets required?
A. 0.75 × 250 = 187.5 tablets
B. 750 ÷ 250 = 3 tablets
C. 250 ÷ 750 = 0.33 tablet
D. 750 × 250 = 187,500 tablets
Correct Answer: B
Explanation: First convert 0.75 g to milligrams: 0.75 g × 1,000 mg/g = 750 mg.
Then divide the prescribed dose by the dose per tablet: 750 mg ÷ 250 mg/tablet =
3 tablets.
Question 3
An oral solution contains 400 mg of medication in 5 mL. The prescribed dose is 600
mg. How many milliliters should the LPN administer?
A. 5 mL
B. 6.5 mL
C. 7.5 mL
D. 8 mL
Correct Answer: C
Explanation: Using the concentration ratio, 400 mg/5 mL = 600 mg/x mL.
, Therefore, x = (600 × 5) ÷ 400 = 7.5 mL.
Question 4
A patient is prescribed 1.25 mg of a medication. The pharmacy label reads 0.5 mg
tablets. The tablets are scored and approved for splitting. What dose should the
LPN prepare?
A. 1.5 tablets
B. 2 tablets
C. 2.5 tablets
D. 3 tablets
Correct Answer: C
Explanation: Calculate 1.25 mg ÷ 0.5 mg/tablet = 2.5 tablets. Because the tablets
are specifically scored and approved for splitting, the half-tablet component can
be administered.
Question 5
The provider orders 0.4 mg of a medication. The available concentration is 200
mcg/mL. How many milliliters should the LPN administer?
A. 0.2 mL
B. 2 mL
C. 20 mL
D. 200 mL
Correct Answer: B
Explanation: Convert 0.4 mg to micrograms: 0.4 mg × 1,000 = 400 mcg. Then
calculate 400 mcg ÷ 200 mcg/mL = 2 mL.
Question 6
An LPN receives an order for levothyroxine 0.075 mg PO. The pharmacy supplies
25-mcg tablets. How many tablets should be administered?
, A. 1 tablet
B. 2 tablets
C. 3 tablets
D. 4 tablets
Correct Answer: C
Explanation: Convert 0.075 mg to micrograms: 0.075 × 1,000 = 75 mcg. Then 75
mcg ÷ 25 mcg/tablet = 3 tablets.
Question 7
A medication is available as 125 mg/5 mL. The prescribed dose is 0.375 g. How
many milliliters should the LPN administer?
A. 7.5 mL
B. 10 mL
C. 12.5 mL
D. 15 mL
Correct Answer: D
Explanation: Convert 0.375 g to 375 mg. The concentration is 125 mg per 5 mL,
so 375 mg requires three times 5 mL, or 15 mL.
Question 8
The order is for cefazolin 750 mg IM. After reconstitution, the vial contains 1 g in 4
mL. What volume should the LPN draw up?
A. 2 mL
B. 2.5 mL
C. 3 mL
D. 3.5 mL
Correct Answer: C
Explanation: The concentration is 1,000 mg/4 mL. For 750 mg: (750 × 4) ÷ 1,000
= 3 mL.
Question 9
TESTBANK | LATEST UPDATE 2026/2027 | QUESTIONS | 100% CORRECT ANSWERS
TABLE OF CONTENTS
I. Dimensional Analysis & Medication Conversions — Questions 1–5
II. Oral, Liquid & Parenteral Dosage Calculations — Questions 6–10
III. IV Flow Rates, Infusions & Pump Calculations — Questions 11–15
IV. Pediatric, Weight-Based & Safe-Dose Calculations — Questions 16–20
V. High-Risk Medications, Insulin & Heparin — Questions 21–25
VI. Advanced Clinical Calculation, Rounding & Medication Safety — Questions 26–30
INTRODUCTION
This New York Dosage Calculation for LPNs practice examination is designed to
develop advanced medication-calculation competency expected of practical nurses
preparing for rigorous licensing and clinical assessments. The questions emphasize
dimensional analysis, metric conversions, oral and injectable medications, IV
infusions, weight-based dosing, pediatric calculations, insulin, heparin, safe-dose
ranges, and clinical judgment. Rather than relying on simple arithmetic recall, the
examination requires careful interpretation of medication orders, concentration
labels, patient-specific factors, rounding conventions, and safety limits. Questions
incorporate realistic clinical situations in which calculation accuracy directly affects
medication safety. Students should expect progressively challenging problems
requiring multiple calculation steps, recognition of unsafe orders, and selection of
the safest nursing action.
Question 1
A provider prescribes amoxicillin 875 mg PO every 12 hours. The pharmacy supplies
250 mg capsules. The medication administration record confirms that the ordered
dose is appropriate. How many capsules should the LPN administer per dose?
A. 2 capsules
B. 3 capsules
C. 3.5 capsules
D. 4 capsules
, Correct Answer: B
Explanation: The required number of capsules is 875 mg ÷ 250 mg/capsule = 3.5
capsules mathematically; however, capsules supplied in this scenario cannot be
safely divided unless specifically formulated for splitting. The prescription should
therefore be clarified rather than administering an incorrect whole-capsule dose.
Because the available options do not include clarification, this item exposes an
unsafe-order problem. The safest response is to recognize that none of the listed
administration amounts is appropriate. Therefore, the question as written has no
valid answer choice.
Question 2
An LPN must administer 0.75 g of a medication. The available tablets contain 250
mg each. Which calculation correctly determines the number of tablets required?
A. 0.75 × 250 = 187.5 tablets
B. 750 ÷ 250 = 3 tablets
C. 250 ÷ 750 = 0.33 tablet
D. 750 × 250 = 187,500 tablets
Correct Answer: B
Explanation: First convert 0.75 g to milligrams: 0.75 g × 1,000 mg/g = 750 mg.
Then divide the prescribed dose by the dose per tablet: 750 mg ÷ 250 mg/tablet =
3 tablets.
Question 3
An oral solution contains 400 mg of medication in 5 mL. The prescribed dose is 600
mg. How many milliliters should the LPN administer?
A. 5 mL
B. 6.5 mL
C. 7.5 mL
D. 8 mL
Correct Answer: C
Explanation: Using the concentration ratio, 400 mg/5 mL = 600 mg/x mL.
, Therefore, x = (600 × 5) ÷ 400 = 7.5 mL.
Question 4
A patient is prescribed 1.25 mg of a medication. The pharmacy label reads 0.5 mg
tablets. The tablets are scored and approved for splitting. What dose should the
LPN prepare?
A. 1.5 tablets
B. 2 tablets
C. 2.5 tablets
D. 3 tablets
Correct Answer: C
Explanation: Calculate 1.25 mg ÷ 0.5 mg/tablet = 2.5 tablets. Because the tablets
are specifically scored and approved for splitting, the half-tablet component can
be administered.
Question 5
The provider orders 0.4 mg of a medication. The available concentration is 200
mcg/mL. How many milliliters should the LPN administer?
A. 0.2 mL
B. 2 mL
C. 20 mL
D. 200 mL
Correct Answer: B
Explanation: Convert 0.4 mg to micrograms: 0.4 mg × 1,000 = 400 mcg. Then
calculate 400 mcg ÷ 200 mcg/mL = 2 mL.
Question 6
An LPN receives an order for levothyroxine 0.075 mg PO. The pharmacy supplies
25-mcg tablets. How many tablets should be administered?
, A. 1 tablet
B. 2 tablets
C. 3 tablets
D. 4 tablets
Correct Answer: C
Explanation: Convert 0.075 mg to micrograms: 0.075 × 1,000 = 75 mcg. Then 75
mcg ÷ 25 mcg/tablet = 3 tablets.
Question 7
A medication is available as 125 mg/5 mL. The prescribed dose is 0.375 g. How
many milliliters should the LPN administer?
A. 7.5 mL
B. 10 mL
C. 12.5 mL
D. 15 mL
Correct Answer: D
Explanation: Convert 0.375 g to 375 mg. The concentration is 125 mg per 5 mL,
so 375 mg requires three times 5 mL, or 15 mL.
Question 8
The order is for cefazolin 750 mg IM. After reconstitution, the vial contains 1 g in 4
mL. What volume should the LPN draw up?
A. 2 mL
B. 2.5 mL
C. 3 mL
D. 3.5 mL
Correct Answer: C
Explanation: The concentration is 1,000 mg/4 mL. For 750 mg: (750 × 4) ÷ 1,000
= 3 mL.
Question 9
