Calculations and Conversions

Conversion of Tbsp, tsp,

1 Tbsp = 3 tsp 1 Tbsp = 15 ml = 3 tsp 2 Tbsp = 30 ml = 1 oz 1 tsp = 5 ml

Conversion of Length

1 inch = 2.54 cm 1 ft = 12 inches

Conversion of Weight

1 kg = 2.2. lbs 1 L = 2.2. lbs 16 oz = 1 lb 1 = 1 ml (diaper wt)

Conversions oz to ml

1 oz = 30 ml 8 oz = 240 ml = 1 Cup 2 cups = 1 pint = 500 ml 4 cups = 2 pints = 1000 ml = 1 Quart

During an eight-hour shift a client drinks two six-ounce cups of tea and vomits 125 mL of fluid. Intravenous fluids absorbed equaled the urinary output. What is the client's fluid balance during this eight-hour period? Record your answer using a whole number. __mL

235 mL is the correct calculation. The client's intake was 360 mL (6 oz x 30 mL = 360 mL) and the loss was 125 mL of fluid; 360 mL - 125 mL = 235 mL. 125 mL is the amount of fluid output. 360 mL is the amount of fluid intake. 485 mL is the result when the intake is added to the output.

A health care provider prescribes 2 L of intravenous (IV) fluid to be administered every 12 hours to a client who sustained a burn injury. The drop factor of the tubing is 10 gtts/mL. The nurse should set the flow rate at how many drops per minute? Record the answer using a whole number. ___ gtts/min

27.77777 = 28 Multiply the amount to be infused (2000 mL) by the drop factor (10), and divide the result by the amount of time in minutes (12 hours × 60 min).

The primary health care provider has prescribed an intravenous (IV) piggyback to be administered every four hours. The prescription is: 1200 mg antibiotic to be added to 50 mL D5W. After the nurse dilutes the powdered medication with the correct amount of saline, the resulting solution contains 1 gram of drug per 3 mL. How much antibiotic solution should be added to the 50 mL of D5W? Record your answer using one decimal place. ___ mL

3.6 mL 3.6 mL is the correct amount of volume to be added to the piggyback solution. Use ratio and proportion to solve the problem. 1200 mg = 1.2 grams 1.2 grams : 1 gram :: x mL : 3 mL 1 x = 3 X 1.2 x = 3.6 mL

After surgery a client is to receive an antibiotic by intravenous (IV) piggyback in 50 mL of a diluent. The piggyback is to infuse in 20 minutes. The drop factor of the IV set is 15 gtts/mL. The nurse should set the piggyback to flow at how many gtts/min? Record your answer using a whole number. ___ gtts/min

37.5 Answer should be rounded to whole number 38 gtt/ml

Conversion of Temperature

°F to °C = ((F - 32) * 5) / 9 °C to °F = ((C * 9) /5 ) + 32