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UCQ

Dosage Calculations

Resources are available for you to understand how to calculate dosages.

"Need to know" conversions for nurses

Here are some useful units that you as a nurse will need to know and use in your practice.

Liquid Measurements and Conversions Abbreviations of Units
1 tbsp. = 3 tsp. tbsp. - tablespoon
1 fl.oz. = 2 tbsp. tsp. - teaspoon
1 cup = 8 fl. oz fl. oz. - fluid ounce
1 tsp. = 5 mL. L. - liter
1 tbsp. = 15 mL.  mL. - milliliter
1 cup = 250 mL. cc. - cubic centimeter
1 L. = 1000 mL.  
1 mL. = 1 cc.  
Mass Measurements and Conversions Abbreviations of Units
2.2 lb = 1 kg. lb. - pound
1 lb. = 16 oz oz. = ounces
1 kg. = 1000 g. kg. - kilogram
1 g. = 1000 mg. g. - gram
1 mg. = 1000 mcg. mg. - milligram
  mcg. - microgram

Standard nursing practice have the following direct conversions.

8 fl.oz. = 250 mL = 1 cup    NOT 8 fl. oz. x 30 Ml/fl.oz. = 240 mL

4 fl. oz. 125 mL = 1/2 cup   NOT 4 fl. oz. x 30 Ml/fl.oz. = 120 mL

In ALL OTHER conversions use 1 fl. oz. = 30 mL in your calculations.