Dimensional Analysis

  • is calculation of units and conversions

  • 3 steps:

  • what is the doctor’s order

  • what is the available: (what is on hand)

  • what is the question asking me to solve


  • for what you are trying to solve for, the UNIT is the same

  • whatever unit is on bottom, will ALWAYS come to the top

  • no cross multiplication, always straight across

  • NURSES LEAD NEVER FOLLOW (0’S)

  • volume less than 1ml is rounded to the hundredths because of the syringe, while greater than 1 is tenths

  • When the dosage form is used as a conversion factor, it is expressed as dosage form dosage form/strength



order: 600 mg,

available: 300 mg tab