Math test help

  1. I am trying to convert mg to ml. If I have Bicillin 1,200,000/2ml on hand and the doctor orders 900,00 units. I did 900,000 ÷1,200,000 =0.75 and then 0.75×2ml =1.5ml. Is this correct?
  2. Visit cvinson30 profile page

    About cvinson30

    Joined: Oct '17; Posts: 5

    4 Comments

  3. by   meanmaryjean
    Quote from cvinson30
    I am trying to convert mg to ml. If I have Bicillin 1,200,000/2ml on hand and the doctor orders 900,00 units. I did 900,000 ÷1,200,000 =0.75 and then 0.75×2ml =1.5ml. Is this correct?
    1.5 x 1,200,000 = 900,000

    you are correct
  4. by   KelRN215
    You went about it a different way than I would have but your answer is correct.

    I would have divided 1,200,000/2 mL to get 600,000 units/mL. (I am assuming the dose in the millions is in units, not mg, because I've never seen a million mg of anything as a dose.) Then I would divide 900,000 units by 600,000 units/mL to get 1.5 mL.
  5. by   bjwojcik
    Hi,
    If you do it like this you will never wonder if you did it correctly.

    900,000 units (2 mL/1,200,000 units) = 1.5 mL

    FYI, you should never have naked numbers running around without their units attached.

    Brad Wojcik, PharmD
  6. by   ~♪♫ in my ♥~
    Quote from bjwojcik
    FYI, you should never have naked numbers running around without their units attached.
    This would eliminate a substantial percentage of errors.

    Quote from cvinson30
    I am trying to convert mg to ml
    You really should strive to understand what the units represent in the physical sense. Mass (mg) plays no role in your problem.

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