The formula for IV drip rate is: vd/t (volume x drop factor/ time)....
http://www.chacha.com/question/whatistheformula...

1. Calculate drops per minute for an IV drip that a patient needs over a period of time by multiplying the volume of the IV set in cc's by the drop factor of the IV set (listed on
http://www.ehow.com/how_5948577_calculateivdrip...

The formula for Drip rate is: total # of milliliters (volume) over total # of minutes (time) x drip factor = gtt/min.
http://www.kgbanswers.co.uk/whatistheformulafo...

Unfortunately, there is more than one macrodrop. They normally range from about 1020 drop per milliliter (gtt/mL)
http://wiki.answers.com/Q/What_is_IV_macrodrip_ra...
