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## Appendix C. Calculations

Math calculation is an integral part of safe nursing care. This section is a review of the conversion tables and sample problems.

### The Apothecary System of Measurement

Equivalents/Conversion Factors

• 1 minim = 1 drop

• 1 fluid dram = 60 minims

• 1 fluid ounce = 8 fluid drams

• 1 dram = 60 grains

• 30 ml = 2 tbs (tablespoons)

• 15 ml = 1 tbs

• 5 ml = 1 tsp (teaspoon)

### The Household System of Measurement

Equivalents/Conversion Factors

• 1 teaspoon = 60 drops

• 2 tablespoon = 1 ounce

• 1 cup = 8 ounces

• 2 cups = 1 pint

• 2 pint = 1 quart

• 4 quarts = 1 gallon

• 1 pound = 16 ounces

• 1 teaspoon = 15–16 minims = 1 mL (milliliter)

• 2.2 pounds = 1 kilogram = 1000 gm (gram)

### Metric Measurements

Equivalents/Conversion Factors ...

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