Clinical Calculations
Exam Practice Tests
Course Introduction
Clinical Calculations is a foundational course designed to develop competency in mathematical calculations essential for safe and effective medication administration in healthcare settings. Students learn to accurately compute dosages, convert between measurement systems, and apply critical thinking skills to solve clinical problems involving oral, injectable, and intravenous medications. The course emphasizes techniques to minimize medication errors and enhance patient safety, incorporating case studies and real-world clinical scenarios. Mastery of these skills prepares students for professional responsibilities in nursing, pharmacy, and other health-related fields.
Recommended Textbook
Calculation of Drug Dosages A Work Text 10th Edition by Sheila J. Ogden RN MSN
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16 Chapters
478 Verified Questions
478 Flashcards
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Chapter 1: Fractions
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Sample Questions
Q1) 5/6 ÷ 1/2 = ____________________ Answer: 1 3/7
Q2) 5 1/2 \(\times\) 1 1/6 = ____________________ Answer: 6 5/12
Q3) 3/10 + 3/5 + ____________________ Answer: 9/10
Q4) 1 5/6 + 3 1/3 + ____________________ Answer: 5 1/6
Q5) 6 1/2 - 1 3/4 = ____________________ Answer: 4 3/4
Q6) 1/3 \(\times\) 3/4 = ____________________ Answer: 1/4
Q7) 11/12 - 1/2 = ____________________ Answer: 5/12
Q8) 4 3/10 ÷ 1 3/4 = ____________________ Answer: 2 16/35
Q9) 2 1/2 \(\times\) 2 1/3 = ____________________ Answer: 8 1/6
Q10) 3 1/2 ÷ 1 1/3 = ____________________ Answer: 2 5/8 Page 3
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Page 4
Chapter 2: Decimals
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Sample Questions
Q1) 1.1 + 50.6 + 30.9 + 6.75 = ____________________ Answer: 89.35
Q2) 0.662 \(\times\) 1000 = ____________________ Answer: 662
Q3) 44.7 \(\times\) 17.13 \(\times\) 60 = ____________________ Answer: 45,942.66
Q4) 17.5 \(\times\) 10 = ____________________ Answer: 175
Q5) 16.75 \(\times\) 4.6 = ____________________ Answer: 12.15
Q6) 4.4 ÷ 0.5 = ____________________ Answer: 8.8
Q7) 258.7 ÷ 100 = ____________________ Answer: 2.587
Q8) 2.67 + 5.1 + 1.3 + 0.9 = ____________________ Answer: 9.97
Q9) 5.32 \(\times\) 67.9 = _________ Answer: 361.228
5
Q10) 354.6 ÷ 1000 = ____________________ Answer: 0.3546
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Chapter 3: Percents
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Sample Questions
Q1) Change 15% to a decimal.____________________ Answer: 0.15
Q2) Change 1/4 to a percent.____________________ Answer: 25%
Q3) Change 16.8% to a proper fraction.____________________ Answer: 21/125
Q4) Change 1.57 to a percent.____________________ Answer: 157%
Q5) What is 25% of 75? ____________________ Answer: 18.75
Q6) Change 67.9% to a decimal.____________________ Answer: 0.679
Q7) What percent of 400 is 125? ____________________ Answer: 31.25%
Q8) Change 44% to a proper fraction.____________________ Answer: 11/25
Q9) What is 15% of 1085.6? _____________________ Answer: 162.84
Q10) Change 7/16 to a percent.____________________ Answer: 43 3/4%
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Page 8
Chapter 4: Ratios
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Sample Questions
Q1) Change 3/8 ÷ 5/12 to a ratio.____________________
Q2) Change 25:100 to a fraction.____________________
Q3) Change 2/7% to a ratio.____________________
Q4) Change 7:20 to a decimal number.____________________
Q5) Change 3/10:2/5 to a fraction.____________________
Q6) Change 1.66 to a ratio.____________________
Q7) Change 27% to a ratio.____________________
Q8) Change 15:75 to a percent.____________________
Q9) Change 35:14 to a decimal number.____________________
Q10) Change 44:88 to a percent.____________________
Q11) Change 0.12 to a ratio.____________________
Q12) Change 1/7 ÷ 4/21 to a ratio.____________________
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Chapter 5: Proportions
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Sample Questions
Q1) 125 : 20 :: 300 : x ____________________
Q2) 25 : 40 :: 75.5 : x ____________________
Q3) x : 0.54 :: 0.6 : 0.8 ____________________
Q4) 30 : 600 :: x : 150 ____________________
Q5) 33% : 66 :: x% : 15 ____________________
Q6) 2/3 : x :: 8/9 : 12 ____________________
Q7) x : 0.7 :: 21.21 : 3 ____________________
Q8) 14 : x :: 28 : 7 ____________________
Q9) 16 : x :: 45 : 15____________________
Q10) x : 1/4 :: 3/4: 32 ____________________
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10
Chapter 6: Metric and Household Measurements
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Sample Questions
Q1) 112.2 lb = ____________________ kg
Q2) 1 mg = _________ mcg
Q3) 3 oz = _____ mL
Q4) 90 kg = ____________________ lb
Q17) 445 mg = _____________________ g
Q18) 12.6 cm = _____________________ mm
Q19) 76 mg = ____________________ mcg
Q20) 750 mL = ____________________ L
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12
Chapter 7: Calculations Used in Patient Assessments
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Sample Questions
Q1) 100 lb = ____________________ kg
Q2) 90 kg = ____________________ lb
Q3) 1.42 mg = ____________________ mcg
Q4) 3800 g = ______ kg
Q5) 220 lb = ______ kg
Q6) 1 g = ___________ mcg
Q7) 1 cup = ________ oz
Q8) 1 mg = _________ mcg
Q9) 12.6 cm = _____________________ in
Q10) Calculate the output.A patient consumes 4 oz of orange juice and 4 oz of milk for breakfast,12 oz of coffee for lunch,and 3 oz mL of an ice pop and 4 oz mL of ice cream for dinner.The patient voided three times during the shift for 240 mL,500 mL,and 400 mL.Calculate the output for the 6 AM to 6 PM shift.
Q11) 17.4 kg = ____________________ g
Q12) 102.5° F = ____________________° C
Q13) 6 cm = ____________________ in
Q14) 2.5 L = ____________________ mL Page 13
Q15) 3.5 kg = ____________________ lb
Q16) 900 mg = ________ g
Q17) 20 kg = ____________________ lb
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Page 14
Chapter 8: Oral Dosages
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Sample Questions
Q1) The physician orders Synthroid 100 mcg po daily for a patient with hypothyroidism.The medication is supplied in 0.1-mg tablets.How many tablets will the nurse administer? _________
Q2) The physician has Levothroid 250 mcg oral daily ordered for a patient with hypothyroidism.The medication is supplied as Levothroid 0.1 mg per tablet.How many tablets of Levothroid would the patient receive with each dose? _________
Q3) A patient with pain has acetaminophen 1000 mg ordered every 4 hours per gastric tube.The acetaminophen syrup is supplied in a 160 milligram per 5-mL concentration.How many milliliters would the nurse administer with each dose? (Round to the nearest tenth)___________
Q4) A patient has orders for guaifenesin 200 mg every 6 hours per gastric tube.The guaifenesin syrup is supplied in a 100 mg per 5-mL concentration.How many milliliters would the nurse administer with each dose? ___________
Q5) A patient with high gastric residuals has Reglan 10 mg every 6 hours per gastric tube ordered.The Reglan syrup is supplied in a 10 mg per 10-mL concentration.How many milliliters would the nurse administer with each dose? ___________
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Page 15
Chapter 9: Parenteral Dosages
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Sample Questions
Q1) The physician orders Solu-Cortef 90 mg IM q8 h.Available: 125 mg/mL.How many milliliters will the nurse administer? ____________________
Q2) A patient has fentanyl 100 mcg IV every 2 hours prn for pain after surgery.The medication is available in 0.05 mg per 1-mL vials.How many milliliters would the nurse administer with each dose? __________
Q3) A patient has labetalol 20 mg IV every 2 hours prn for systolic blood pressure above 180 mm Hg.The medication is available in 5 mg per 1-mL vials.How many milliliters would the nurse administer with each dose? __________
Q4) The physician orders Toradol 45 mg IM for migraine headache.The medication is supplied in 30 mg/mL.How many milliliters will the nurse administer?
Q5) Zofran 8 mg IV every 6 hours as needed for nausea is ordered.The medication is available in a 2-mg/mL concentration.How many milliliters would the nurse administer with each dose? ________
Q6) The physician orders morphine 9 mg IM q4 h for pain.Available: 15 mg/mL.How many milliliters will the nurse administer? ____________________
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Chapter 10: Dosages Measured in Units
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Sample Questions
Q1) The physician orders heparin 5500 units subcutaneous for deep vein thrombosis prevention.The medication is supplied in 10,000 units/mL.How many milliliters will the nurse administer? ____________________
Q2) The physician orders heparin 5000 units subcutaneous every 12 hours for a patient with a deep vein thrombosis.The heparin is available in 20,000 units per 1-mL concentration.How many milliliters would the nurse administer with each dose?
Q3) Heparin 10,000 units subcutaneous every 12 hours is ordered for a patient after a stent placement.The heparin is available in 20,000 units per 1-mL concentration.How many milliliters would the nurse administer with each dose? __________
Q4) A patient has orders for Fragmin 10,000 international units twice a day for deep vein thrombosis prevention.The Fragmin is available in 5000 international units per 0.4 milliliter vials.How many milliliters would the nurse administer with each dose?
Q5) A patient has orders for Fragmin 2500 international units twice a day for deep vein thrombosis prevention.The Fragmin is available in 5000 international units per 0.4 milliliter vials.How many milliliters would the nurse administer with each dose?
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Chapter 11: Reconstitution of Medications
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Sample Questions
Q1) The physician orders Ancef 500 mg IV for a urinary tract infection.After reconstitution,the medication is available as 330 mg/mL.How many milliliters will the nurse administer?
Q2) The physician orders Pfizerpen 750,000 units IV for an upper respiratory infection.After reconstitution,the medication is available as 500,000 units/mL.How many milliliters will the nurse administer?
Q3) The physician orders Keflex 250 mg po for strep throat.After reconstitution,the medication is available as 125 mg/5 mL.How many milliliters will the nurse administer?
Q4) The physician orders Ceclor 175 mg po for an ear infection.After reconstitution,the medication is available as 125 mg/5 mL.How many milliliters will the nurse administer?
Q5) The physician orders Vancocin 375 mg po for a staph infection.After reconstitution,the medication is available as 250 mg/5 mL.How many milliliters will the nurse administer?
Q6) The physician orders Ampicillin 150 mg IM for a systemic infection.After reconstitution,the medication is available as 125 mg/mL.How many milliliters will the nurse administer?
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Chapter 12: Intravenous Flow Rates
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Sample Questions
Q1) The physician orders Doribax 250 mg twice a day.The Doribax is dissolved in 250 mL of NS and is to be infused over 2 hours.Using an IV controller,how many milliliters per hour should the Doribax be infused? ___________
Q2) The physician orders magnesium sulfate 500 mg/h.The medication is supplied in 4 g/250 mL.Calculate the flow rate in milliliters per hour.____________________
Q3) Zosyn 4.5 g IV once a day is ordered for a patient.The Zosyn is dissolved in 50 mL of NS and should infuse over 1 hour.Using tubing with a drop factor of 20 gtt/mL,how many drops per minute should the Zosyn be infused? ___________
Q4) 500 mL of NS is ordered over 2 hours for a patient with oliguria.Using an IV controller,how many milliliters per hour should the NS be infused? ________
Q5) Tygacil 50 mg IV once a day is ordered for a patient.The Tygacil is dissolved in 50 mL of NS and should infuse over 30 minutes.Using tubing with a drop factor of 20 gtt/mL,how many drops per minute should the Tygacil be infused? ___________
Q6) The physician orders a continuous IV morphine drip to infuse at 6 mg/h.The medication is supplied in 50 mg/50 mL.Calculate the flow rate in milliliters per hour.____________________
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19
Chapter 13: Intravenous Flow Rates for Dosages Measured
in Units
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Sample Questions
Q1) Calculate the units of heparin required for the bolus dose.Round the final answer to the nearest hundredth place.Order: Begin a heparin drip per the facility's protocol.The patient's weight is 96 kg.Heparin Protocol Bolus: Heparin 80 units/kg Infusion: Heparin 18 units/kg/h using a concentration of heparin 25,000 units in 250 mL of NS (100 units/mL)
Q2) Calculate the units of heparin required for the bolus dose.Round the final answer to the nearest hundredth place.Order: Begin a heparin drip per the facility's protocol.The patient's weight is 76 kg.Heparin Protocol Bolus: Heparin 70 units/kg Infusion: Heparin 17 units/kg/h using a concentration of heparin 25,000 units in 250 mL of NS (100 units/mL)
Q3) Calculate the milliliters per hour of heparin required for the continuous infusion.Order: Begin a heparin drip per the facility's protocol.The patient's weight is 66 kg.Heparin Protocol Bolus: Heparin 80 units/kg Infusion: Heparin 18 units/kg/h using a concentration of heparin 25,000 units in 250 mL of NS (100 units/mL)
Q4) Calculate the milliliters per hour of heparin required for the continuous infusion.Order: Begin a heparin drip per the facility's protocol.The patient's weight is 96 kg.Heparin Protocol Bolus: Heparin 80 units/kg Infusion: Heparin 18 units/kg/h using a concentration of heparin 25,000 units in 250 mL of NS (100 units/mL)
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Page 20
Chapter 14: Critical Care Intravenous Flow Rates
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Sample Questions
Q1) Round your answer to the nearest whole number.A patient is receiving lidocaine at 15 mL/h.The concentration of lidocaine is 2 g/500 mL of D<sub>5</sub>W.Calculate the milligrams per minute the patient is receiving.____________________
Q2) Round your answer to the nearest whole number.The physician orders a Levophed IV drip at 2.5 mcg/min for hypotension.The medication is supplied in 2 mg/500 mL of D<sub>5</sub>W.Calculate the flow rate in milliliters per hour.____________________
Q3) Round your answer to the nearest whole number.The physician has ordered an Inocor drip at 5 mcg/kg/min for a patient with congestive heart failure.The Inocor concentration is 500 mg/250 mL D<sub>5</sub>W.How many milliliters per hour should the Inocor infuse for a patient weighing 64 kg? ______________
Q4) Round your answer to the nearest tenth.A patient with an admitting blood pressure of 230/140 mm Hg is receiving nitroprusside at 50 mL/h.The patient's weight is 70 kg.The nitroprusside concentration is 50 mg/250 mL of D<sub>5</sub>W.How many micrograms per kilograms per minute of nitroprusside are infusing? _____________
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Chapter 15: Pediatric Dosages
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Sample Questions
Q1) The recommended dosage of gentamicin IVPB for a child is 6 mg/kg/day in two equal doses.The child's weight is 44 lb.The tubing drop factor is 60 gtt/mL.The medication is supplied in 60 mg/100 mL to infuse over 90 minutes.
a.What is the child's weight in kilograms? _____________
b.Calculate the dose for this child.____________________
c.Calculate the rate in milliliters per hour for this IV.____________________
d.Calculate the drops per minute.____________________
Q2) The recommended safe dose of rifampin for a child is 5 mg/kg/dose.The child's weight is 11 lb.The medication is supplied in 10 mg/mL.
a.What is the child's weight in kilograms? _____________
b.Calculate the safe dose for this child.____________________
c.How many milliliters will be administered for each dose? ____________________
Q3) The recommended dose of Lasix for a child is 1 mg/kg/dose.The child's weight is 77 lb.The medication is supplied in 10 mg/mL.
a.What is the child's weight in kilograms? _____________
b.Calculate the safe dose for this child.____________________
c.How many milliliters will be administered for each dose? ____________________
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Chapter 16: Obstetric Dosages
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Sample Questions
Q1) Round the answer to the nearest tenth.A physician writes orders for 1 g/h of magnesium sulfate for a patient in labor.The medication comes premixed with 40 g magnesium sulfate in 500 mL of lactated Ringer's solution.The IV pump should be programmed for how many milliliters per hour? ________
Q2) Round the answer to the nearest whole number.A physician writes orders for 1 g/h of magnesium sulfate for a patient in labor.The medication comes premixed with 20 g of magnesium sulfate in 100 mL of lactated Ringer's solution.How many milliliters per hour should the IV pump be programmed? ________
Q3) Round the answer to the nearest whole number.With your initial rounding,you find a Pitocin drip at 15 mL/h.With a Pitocin concentration of 30 units per 500 mL of lactated Ringer's solution,how many milliunits per minute of Pitocin is the patient receiving?
Q4) Round the answer to the nearest whole number.A physician writes orders to increase a magnesium sulfate drip to 2 g/h for a patient in labor.The medication has a concentration of 40 g magnesium sulfate in 500 mL of lactated Ringer's solution.The IV pump should be programmed for how many milliliters per hour? ____________
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Page 23