![]() ![]() The easy way Order is for 45 mg Benadryl You have 50 mg in 2 mL 50 45 - 2 X The easy way Set up an equation Cross Multiply Divide Sound like algebra? Try it on your own Benadryl – 50 mg in 2 mL Orders are for 12.5 mg Show your work īenadryl 12.5 mg X 2 mL - = volume to administer 50 mg 12.5 X 2 = 25 / 50 = 0.5 mL The order is for 40mg 80 mg X 10 mL - = volume to administer 100 mg Įxample mg’s cancel out 80 X 10mL = 800mL/100 = 8 80 mg X 10 mL - = 8 mL 100 mg You have 1mg in 10 mL pre-filled syringe 0.5 mg X 10 mL - = volume to administer 1.0 mg Įxample mg’s cancel out 0.5 X 10mL = 5mL 0.5 mg X 10 mL - = 5 mL 1.0 mg Īnother Example You have 100mg Furosemide in a 10mL vial. Standard Administration The long formula dose desired X volume on hand Volume to administer = - dose on hand Įxample Orders call for 0.5mg Atropine for symptomatic bradycardia. 995 75 / 99.5 move decimal - 0.7537 Ĭonverting 1g = 1000mg so… g mg X 1000 1mg = 1000 µg so… mg g X 1000 1g = ? g = 1,000,000 g Ĭonverting 500mL = 0.5L so… mL L / 1000 The Bottom Line… To convert from the base to mili X 1000 To convert from mili to the base / 1000 To convert from mili to X 1000 To convert from base to X 1000000 The math Adding – keep the decimal points in line Subtracting – see above Multiplying – multiply without regard to decimals then add decimal places Dividing – make the divisor a whole number and add zeroes to the dividend Īddition 4.3795 + 5.2389 - 9.6184 Metric System Gram = g Liter = l Kilogram = kg Milliliter = mL Milligram = mg Cubic centimeter = cc Microgram = g 1 L = 1000 mL 1 mL = 1 cc 1 g = 1000 mg 1 mg = 1000 g 1cc = 1 mL 1 g = 0.001 mg 1 mg = 0.001 g Metric System Deca 10 Hecto 100 Kilo 1000 Deci 0.1 Centi 0.01 Mili 0.001 Metric System System of 10 (base 10) No fractions only decimals EASY! On your own 120 º F Celsius 76.4 º F Celsuis 60 º C Fahrenheit 24 º C Fahrenheit Temperature Conversions Celsius Fahrenheit Multiply by 1.8 Add 32 37 º X 1.8 = 66.6 66.6 + 32 = 96.6º F Temperature Conversions Fahrenheit Celsius Subtract 32 from the temperature Multiply by 0.556 or 5/9 98.6 – 32 = 66.6 66.6 X 0.556 = 37.03 = 37 º C Temperature Conversions Fahrenheit: Water Freezes at 32 º F Water Boils at 212º F Celsuis: Water Freezes at 0 º C Water Boils at 100º C 90 10% of 90 = 9 81 kilogramsĬonversion Practice 180 lb patient, what is the weight in kilograms lbs / 2.2 = kilograms 180 / 2.2 = 81.82 kilograms Weight Conversion Fact: 1 kilogram (kg) = 2.2 pounds (lbs) Fact: Weight in kgs X 2.2 = weight in pounds Fact: Weight in pounds / 2.2 = weight in kilograms Ĭonversion Practice 245 lb patient, what is weight in kilograms lbs / 2.2 = kilograms 245 / 2.2 = 111.36 kgsĬonversion Practice 140 lb patient, what is the weight in kilograms lbs / 2.2 = kilograms 140 / 2.2 = 63.63 kilogramsĬonversion Practice The easy way… Half of weight in pounds, subtract 10% Example: 180 lbs. Ĭonversion Practice 100 kilogram patient, what is weight in pounds kilograms X 2.2 = pounds 100 X 2.2 = 220 lbs. ![]() Weight Conversion Fact: 1 kilogram (kg) = 2.2 pounds (lbs) Fact: Weight in kgs X 2.2 = weight in pounds Ĭonversion Practice 80 kilogram patient, what is weight in pounds kilograms X 2.2 = pounds 80 X 2.2 = 176 lbs. ![]() Topics Apothecary System Weight and Temperature Conversions Metric System Med Math Administration Doses Weight Based Doses Drip Rate Calculations Īpothecary System Phased out and replaced by metric system Basic Units: grain (gr), dram (dr), drop (gtt), ounce, (oz), pint (pt), quart (qt) Equivalents 1dr = 1 tsp = 60 gtts 3tsp = 1 Tbsp Tips for success Pick one method, that is easiest for YOU Study it Learn it Practice it Practice it Practice it ![]()
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