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MedTestBankDosage Calculation for Nursing

IV flow rate practice problems

Dosage calculation practice for nursing students: solve unlimited new problems below with instant checking, or work through the 15 problems with answers further down.

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Formula to use

mL/hr = total volume (mL) ÷ total time (hr)

If the time is in minutes: mL/hr = volume (mL) ÷ time (min) × 60

Open the iv flow rate (ml/hr) calculator to check your own numbers step by step.

15 practice problems with answers

Solve each problem on paper first, then open the answer to compare every step.

  1. Infuse levofloxacin 750 mg in 150 mL over 90 minutes on an infusion pump. At what rate in mL/hr will you set the pump?

    Show the answer
    1. Convert minutes to hours: 90 min ÷ 60 = 1.5 hr.
    2. mL/hr = 150 mL ÷ 1.5 hr = 100 mL/hr.

    Answer: 100 mL/hr

  2. The order is 1,000 mL of D5 0.45% sodium chloride IV over 6 hours. At what rate in mL/hr will you set the pump? Round to the tenth if needed.

    Show the answer
    1. mL/hr = volume ÷ hours = 1,000 mL ÷ 6 hr = 166.667 mL/hr.
    2. Answer: 166.7 mL/hr.

    Answer: 166.7 mL/hr

  3. Infuse acetaminophen 1,000 mg in 100 mL over 15 minutes on an infusion pump. At what rate in mL/hr will you set the pump?

    Show the answer
    1. Convert minutes to hours: 15 min ÷ 60 = 0.25 hr.
    2. mL/hr = 100 mL ÷ 0.25 hr = 400 mL/hr.

    Answer: 400 mL/hr

  4. The order is 750 mL of D5W IV over 4 hours. At what rate in mL/hr will you set the pump? Round to the tenth if needed.

    Show the answer
    1. mL/hr = volume ÷ hours = 750 mL ÷ 4 hr = 187.5 mL/hr.
    2. Answer: 187.5 mL/hr.

    Answer: 187.5 mL/hr

  5. The order is 750 mL of D5 0.45% sodium chloride IV over 4 hours. At what rate in mL/hr will you set the pump? Round to the tenth if needed.

    Show the answer
    1. mL/hr = volume ÷ hours = 750 mL ÷ 4 hr = 187.5 mL/hr.
    2. Answer: 187.5 mL/hr.

    Answer: 187.5 mL/hr

  6. The order is 1,000 mL of lactated Ringer's IV over 24 hours. At what rate in mL/hr will you set the pump? Round to the tenth if needed.

    Show the answer
    1. mL/hr = volume ÷ hours = 1,000 mL ÷ 24 hr = 41.667 mL/hr.
    2. Answer: 41.7 mL/hr.

    Answer: 41.7 mL/hr

  7. Infuse piperacillin-tazobactam 3.375 g in 100 mL over 30 minutes on an infusion pump. At what rate in mL/hr will you set the pump?

    Show the answer
    1. Convert minutes to hours: 30 min ÷ 60 = 0.5 hr.
    2. mL/hr = 100 mL ÷ 0.5 hr = 200 mL/hr.

    Answer: 200 mL/hr

  8. The order is 250 mL of D5 0.45% sodium chloride IV over 6 hours. At what rate in mL/hr will you set the pump? Round to the tenth if needed.

    Show the answer
    1. mL/hr = volume ÷ hours = 250 mL ÷ 6 hr = 41.667 mL/hr.
    2. Answer: 41.7 mL/hr.

    Answer: 41.7 mL/hr

  9. Infuse vancomycin 1.5 g in 500 mL over 120 minutes on an infusion pump. At what rate in mL/hr will you set the pump?

    Show the answer
    1. Convert minutes to hours: 120 min ÷ 60 = 2 hr.
    2. mL/hr = 500 mL ÷ 2 hr = 250 mL/hr.

    Answer: 250 mL/hr

  10. The order is 500 mL of D5W IV over 4 hours. At what rate in mL/hr will you set the pump? Round to the tenth if needed.

    Show the answer
    1. mL/hr = volume ÷ hours = 500 mL ÷ 4 hr = 125 mL/hr.
    2. Answer: 125 mL/hr.

    Answer: 125 mL/hr

  11. The order is 500 mL of 0.9% sodium chloride IV over 3 hours. At what rate in mL/hr will you set the pump? Round to the tenth if needed.

    Show the answer
    1. mL/hr = volume ÷ hours = 500 mL ÷ 3 hr = 166.667 mL/hr.
    2. Answer: 166.7 mL/hr.

    Answer: 166.7 mL/hr

  12. The order is 750 mL of D5W IV over 10 hours. At what rate in mL/hr will you set the pump? Round to the tenth if needed.

    Show the answer
    1. mL/hr = volume ÷ hours = 750 mL ÷ 10 hr = 75 mL/hr.
    2. Answer: 75 mL/hr.

    Answer: 75 mL/hr

  13. The order is 250 mL of 0.9% sodium chloride IV over 6 hours. At what rate in mL/hr will you set the pump? Round to the tenth if needed.

    Show the answer
    1. mL/hr = volume ÷ hours = 250 mL ÷ 6 hr = 41.667 mL/hr.
    2. Answer: 41.7 mL/hr.

    Answer: 41.7 mL/hr

  14. Infuse vancomycin 1 g in 250 mL over 120 minutes on an infusion pump. At what rate in mL/hr will you set the pump?

    Show the answer
    1. Convert minutes to hours: 120 min ÷ 60 = 2 hr.
    2. mL/hr = 250 mL ÷ 2 hr = 125 mL/hr.

    Answer: 125 mL/hr

  15. The order is 750 mL of lactated Ringer's IV over 24 hours. At what rate in mL/hr will you set the pump? Round to the tenth if needed.

    Show the answer
    1. mL/hr = volume ÷ hours = 750 mL ÷ 24 hr = 31.25 mL/hr.
    2. Answer: 31.3 mL/hr.

    Answer: 31.3 mL/hr