Calling all nurses, pharmacy students, and healthcare pros! Ready to level up clinical confidence? Dive into our medication dosage quiz and discover your dosage computation skills in action. In this free, scored challenge, you'll tackle real-world medication calculation questions - from intravenous drips to tablet conversions - and sharpen your edge for a nursing dosage calculations quiz or a drug dosage practice test. Get instant feedback on your medical math accuracy, try our dosage calculation quiz , or boost precision with medication calculation practice . Jump in now and master this dosage computation quiz online - let's get calculating!
A patient is prescribed 1,500 mg of medication. The medication is available in 500 mg tablets. How many tablets should the patient take?
2 tablets
3 tablets
1 tablet
4 tablets
To find the number of tablets, divide the total ordered dose by the strength per tablet. Here, 1,500 mg ÷ 500 mg per tablet equals 3 tablets. Always confirm with the medication label and verify calculations. Learn more about dosage calculations.
The order is for 0.25 g of a drug. How many milligrams is this?
250 mg
25 mg
2.5 mg
2,500 mg
To convert grams to milligrams, multiply by 1,000. Thus, 0.25 g × 1,000 = 250 mg. Accurate unit conversion is critical in medication dosing. Review conversion tables.
A physician orders 100 mg of a medication, and the vial contains 50 mg/mL. How many milliliters should be administered?
0.5 mL
1 mL
2 mL
0.2 mL
Divide the ordered dose by the concentration: 100 mg ÷ 50 mg/mL = 2 mL. Always round appropriately and verify with institutional policies. See more on IV medication calculations.
The prescription is for 750 mL of D5W to infuse over 5 hours. What is the infusion rate in mL per hour?
150 mL/hr
100 mL/hr
125 mL/hr
175 mL/hr
Calculate flow rate by dividing the total volume by the infusion time: 750 mL ÷ 5 hours = 150 mL/hr. Always set infusion pumps to this rate. More on IV flow calculations.
A patient needs 40 mg of furosemide. The tablets are 20 mg each. How many tablets are required?
1 tablet
2 tablets
3 tablets
4 tablets
Divide the ordered dose by tablet strength: 40 mg ÷ 20 mg/tablet = 2 tablets. Accurate tablet counting prevents under- or overdosing. Learn about furosemide dosing.
An infant weighing 4 kg is prescribed 10 mg/kg of medication. What is the total dose in mg?
40 mg
14 mg
400 mg
25 mg
Weight-based dosing multiplies the patient's weight by the dose per kilogram: 4 kg × 10 mg/kg = 40 mg. Always double-check weight in kilograms. Pediatric dosing guide.
The label reads 1 g per 250 mL. How many grams are in 125 mL?
0.5 g
0.25 g
2 g
1 g
If 1 g is in 250 mL, then 125 mL is half that volume: 1 g ÷ 2 = 0.5 g. Proportion calculations are key in IV admixture. See IV concentration examples.
A medication dose is 0.75 g. The pharmacy stocks tablets of 250 mg. How many tablets should be administered?
1 tablet
2 tablets
3 tablets
4 tablets
Convert grams to milligrams (0.75 g = 750 mg) and divide by tablet strength: 750 mg ÷ 250 mg/tablet = 3 tablets. Always verify conversions before administration. Conversion rules overview.
An IV solution of 1,000 mL is ordered to infuse over 8 hours. What is the flow rate in mL/hr?
125 mL/hr
100 mL/hr
150 mL/hr
110 mL/hr
Divide total volume by infusion time: 1,000 mL ÷ 8 hr = 125 mL/hr. Always set the pump rate to the nearest whole number unless policy states otherwise. IV flow rate methods.
An IV drip set delivers 15 drops/mL. The order is to infuse 75 mL/hr. What is the drip rate in drops per minute?
19 gtt/min
17 gtt/min
15 gtt/min
22 gtt/min
Drip rate (gtt/min) = Volume (mL/hr) × Drop factor (gtt/mL) ÷ 60. So 75 × 15 ÷ 60 ? 18.75, rounded to 19 gtt/min. Drip rate calculation guide.
Convert 500 mcg to milligrams.
0.05 mg
0.5 mg
5 mg
0.005 mg
To convert micrograms to milligrams, divide by 1,000: 500 mcg ÷ 1,000 = 0.5 mg. Always pay attention to units to avoid dosing errors. Unit conversion overview.
A child weighing 20 kg is prescribed amoxicillin at 45 mg/kg/day in divided doses every 8 hours. What is the amount per dose?
300 mg
450 mg
200 mg
150 mg
First calculate daily dose: 20 kg × 45 mg/kg = 900 mg/day. Divide by 3 doses: 900 mg ÷ 3 = 300 mg per dose. Pediatric dosing must be precise. Pediatric dosing examples.
A drug is available as 250 mg/5 mL. The order is for 600 mg. How many mL should be given?
12 mL
10 mL
15 mL
8 mL
Use the ratio: (600 mg × 5 mL) ÷ 250 mg = 12 mL. Confirm calculations against standardized references. Dosage calculation resources.
A medication order reads 'take 1 teaspoonful TID.' How many mL is one teaspoon?
5 mL
3 mL
10 mL
15 mL
A standard teaspoonful equals 5 mL. Nurses must recognize common household-to-metric conversions. Conversion quick reference.
An order is for 2 U/kg of heparin IV push for a 70-kg patient. How many units should be drawn?
140 units
70 units
200 units
210 units
Multiply weight by dose per kilogram: 70 kg × 2 U/kg = 140 units. Always confirm heparin dosing with institutional guidelines. Heparin protocol.
A vial contains 1,000 units of insulin in 10 mL. How many units are in 1 mL?
10 units
100 units
1,000 units
50 units
Divide total units by total volume: 1,000 units ÷ 10 mL = 100 units/mL. Correct concentration ensures accurate dosing. Insulin concentration guidelines.
A nurse is running an infusion of 800 mL over 10 hours. After 4 hours, only 300 mL remains. What should the new flow rate be to complete the infusion on schedule?
50 mL/hr
60 mL/hr
70 mL/hr
80 mL/hr
If 300 mL remains and 6 hours are left, 300 mL ÷ 6 hr = 50 mL/hr. Recalculate rates whenever infusion progress changes. Adjusting infusion rates.
A 250 mg powdered vial is reconstituted with 5 mL diluent to yield 50 mg/mL. The order is for 125 mg. How many mL should be administered?
2.5 mL
1.5 mL
3 mL
2 mL
After reconstitution, concentration = 250 mg ÷ 5 mL = 50 mg/mL. Then 125 mg ÷ 50 mg/mL = 2.5 mL. Proper reconstitution technique avoids dosing errors. Reconstitution best practices.
A drug order is 0.6 mg/kg IV for a 55-kg patient. The available concentration is 2 mg/mL. How many mL are needed?
16.5 mL
12.5 mL
18.0 mL
20.0 mL
Total dose = 0.6 mg/kg × 55 kg = 33 mg. Volume = 33 mg ÷ 2 mg/mL = 16.5 mL. Verify all steps when calculating weight-based IV doses. Weight-based infusion considerations.
Using the Mosteller formula, calculate the BSA dosing for a child with height 130 cm and weight 30 kg if the dose is 50 mg/m². What is the dose?
52 mg
28 mg
104 mg
65 mg
Mosteller BSA = ?[(height cm × weight kg) ÷ 3600] = ?(3900 ÷ 3600) ? 1.04 m². Dose = 1.04 × 50 mg/m² ? 52 mg. BSA dosing improves accuracy in pediatrics. BSA calculation guide.
A continuous infusion is ordered at 5 mcg/kg/min for a 70-kg patient. The drug concentration is 200 mcg/mL. What is the infusion rate in mL/hr?
An antibiotic infusion contains 24 g in 240 mL D5W to run over 24 hours. What is the rate in mL/hr?
10 mL/hr
8 mL/hr
12 mL/hr
15 mL/hr
Divide total volume by time: 240 mL ÷ 24 hr = 10 mL/hr. Confirm compatibility of antibiotic concentration with infusion rate. Infusion rate resources.
A physician orders 0.03 units/kg/min of insulin for a 60-kg patient. The IV bag has 100 units in 100 mL. What is the infusion rate in mL/hr?
108 mL/hr
64.8 mL/hr
1.08 mL/hr
1080 mL/hr
Calculate units/min: 0.03 × 60 kg = 1.8 U/min. Convert to hourly: 1.8 × 60 = 108 U/hr. At 1 U/mL, rate = 108 mL/hr. Insulin infusion protocols.
A nurse needs to prepare 2 L of D5W with KCl at 20 mEq/L. How many mEq of KCl is needed?
40 mEq
20 mEq
60 mEq
80 mEq
Total mEq = concentration × volume: 20 mEq/L × 2 L = 40 mEq. Accurate electrolyte additions prevent complications. Electrolyte preparation guide.
A heparin infusion is prepared by adding 25,000 units to 500 mL D5W. The order is for 18 units/kg/hr for a 70-kg patient. At what rate in mL/hr should this infusion run?
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Study Outcomes
Calculate accurate medication dosages -
Engage with drug dosage practice test scenarios to determine correct dosages for both standard and weight-based orders in our medication dosage quiz.
Convert common measurement units -
Apply nursing dosage calculations quiz techniques to convert between milligrams, milliliters, units, and other common drug measurement units with confidence.
Apply dosage calculation formulas -
Use percentage, ratio, and dimensional analysis methods to solve medication calculation questions in real-world clinical scenarios.
Interpret prescription orders and labels -
Analyze medication orders, labels, and abbreviations to ensure accurate understanding and proper administration.
Analyze and correct dosing errors -
Identify potential miscalculations from your scored quiz results and learn strategies to avoid common dosage computation mistakes.
Evaluate personal calculation proficiency -
Review immediate feedback from the dosage computation quiz online to pinpoint strengths and areas for improvement in your dosage calculation skills.
Cheat Sheet
Dimensional Analysis Method -
Dimensional analysis is the gold standard for dosage computation, treating units like algebraic terms to cancel out unwanted measures. For example, to give 500 mg using 250 mg tablets, set up (500 mg ÷ 250 mg) × 1 tablet = 2 tablets. This method is endorsed by many nursing schools for its clarity and error reduction (University of Michigan School of Nursing).
Formula Method (D/H × V = X) -
The formula method uses Dose ordered (D) divided by Dose on hand (H) multiplied by Vehicle volume (V) to find the amount to administer. For instance, if you need 750 mg of a suspension that comes as 250 mg/5 mL, calculate (750 ÷ 250) × 5 mL = 15 mL. Widely taught in clinical pharmacology courses, this approach is backed by the American Nurses Association for consistent drug dosing.
IV Flow Rate Calculations -
Calculating IV drip rates requires gtt/min = (Total volume [mL] × Drop factor [gtt/mL]) ÷ Time [min]. For example, 1,000 mL over 8 hours with a 15 gtt/mL set is (1,000×15)÷480 = 31 gtt/min. This formula is a staple in Mosby's Nursing Skills guidelines to ensure safe fluid administration.
Pediatric Dosage with Clark's Rule -
Clark's Rule estimates a child's dose using (Weight [lb] ÷ 150) × Adult dose, simplifying pediatric calculations. For a 30 lb child on a 200 mg adult dose: (30 ÷ 150) × 200 mg = 40 mg. This mnemonic-driven formula is validated by pediatrics literature to minimize dosing errors.
"Five Rights" Mnemonic for Safe Dosing -
Always verify the Five Rights: Right Patient, Right Drug, Right Dose, Right Route, and Right Time before administering any medication. A quick mental check - "5 Ps" (Patient, Pill, Portion, Path, Point in time) - helps reinforce safety. This practice is mandated by the National Council of State Boards of Nursing to reduce medication errors.
