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Study Guide: PTCE: Important Math Conversions to Remember
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PTCE: Important Math Conversions to Remember

By Fatskills Exam Guides Team — the exam nerds behind 28,500+ quizzes and 2.1M practice questions across 500+ global exams.

⏱️ ~1 min read
Avoirdupois Measurement - 1 grain (gr) = 64.8 mg (permissible to round to 65 mg)
Apothecary Measurements - 1 pint = 473 mL - 1 fluid ounce = 29.6 mL (permissible to round to 30 mL)
Common or Household Measurements - 1 gallon (gal) = 4 quarts - 1 quart (qt) = 2 pints - 1 pint (pt) = 2 cups - 1 cup = 8 fluid ounces - 1 fluid ounce (fl oz) = 2 tablespoonfuls = 30 mL - 1 tablespoonful (T or tbsp) = 3 teaspoonfuls - 1 teaspoonful (tsp) = 5 mL - 1 pound (lb) = 16 ounces (oz)
Metric System Measurements - 1 inch (in) = 2.54 centimeters (cm) - 1 liter (L) = 1,000 milliliters (mL) - 1 kilogram (kg) = 1,000 grams (g) - 1 milligram (mg) = 1,000 micrograms (mcg)
Other Measurements - 1 cubic centimeter (cc) is synonymous with 1 milliliter (mL) (1 cc = 1 mL) - 1 kg = 2.2 lb - 1 lb = 454 g - 1 oz = 28.35 g - Insulin U-100 = 100 IU per mL (100 international units per mL) - Ophthalmic and otic drops are assumed to be 20 gtts per mL unless stated otherwise -
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- I or i = 1 - V or v = 5 - X or x = 10 - L or l = 50 - C or c = 100 - D or d = 500 - M or m = 1,000

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