dosage calculation conversions that you have to know for nursing school one grain is equal to 65 milligrams it's not tested on very often but when it is you absolutely have to know it one liter is 1 000 milliliters 1 milligram is 1 000 micrograms and 1 kilogram is 1 000 grams and one kilogram is 2.2 pounds this one's really important for pediatric calculations and you can find all these flashcards and more inside the nursing school dose calc box