2
Abbreviations Equivalent/Conversion Factors
Volume
Drop(s) = gtt(s)
Teaspoon = tsp or t 1 tablespoons = 3 teaspoons
Tablespoon = tbsp or T 2 tablespoons = 1 ounce
Once = oz 1 cup = 8 ounces
Pint = pt 2 cups = 1 pint
Quart = qt 2 pints = 1 quart
Weight
Pound = lb 1 pound = 16 ounces
Ounce = oz
Length
Inch = in
Foot = ft 1 foot = 12 inches
EQUIVALENTS
TABLE 5. C04LMONLY USED CONVERSION FACTORS
Household Apothecary Metric
Volume
______15 minims = 1 milliliter
1 teaspoon = 1 fluid drams = 5milliliters
1 tablespoon = 3 fluid drams = 15 milliliters
2 tablespoon = 1 fluid ounce = 30 milliliters = 6 tsp = 8 dr
1 cup = 8 fluid ounces = 240 milliliters
1 pint = 16 fluid ounces = ` 500 milliliters
1 quart = 32 fluid ounces = ~ 1000 milliliters = 1 liter
wel ah t
= 1 grain = ' 60 milligrams
______= 15 grains = ~ 1 gram
______= 1 dram = 4 grams
2.2 pounds = _ 1 kilograms
Length
1 inch = _ 2.54 centimeters
Units of Measurement Terminology of Prefixes
Length
m= metercm = centimeter
mm = millimeter
Volume
L = Literml = millimeter
cc = cubic centimeter
Weight
kg= kilogram
Gm= gram
mg = milligram
mcg = microgram / Kilo- 1000 times greater
Centi- 100 times smaller
Milli- 1000 times smaller
Micro- 1,000,000times smaller
Conversion factor/Equivalents
1m =100 cm = 1000 mm
1L =1000 ml = 1000 cc
1 kg =100Gm
1 Gm =1000 mg
1 mg = 1000 mcg
1 ml = 1 cc
Note: cc and ml are equivalent
Abbreviations Equivalents/Conversion Factors
Volume
Minim = Mx
Fluid dram = fl dr 1 fluid dram = 60 minims
Fluid ounce = fl oz 1 fluid ounce = 8 fluid drams
Weight
Grain =gr
Dram = dr 1 dram = 60 gains
WEIGHT VOLUME
1 gr = 60 mg 1 MI= 15 minims
1 mg = 1000 mcg 5 ml = 1 fl dr = 1 tsp
1 Gm = 1000 mg = 15 gr 15 ml = 3 fl dr = 1 tbsp (3 tsp)
1 kg = 1000 Gm = 2.2 lb 30 ml = 8 fl dr = 1 oz (2 tbs )
Numbers Used in the Apothecary System
1,1 = one TX, ix = nine
II, ii = two X, x = ten
IIL, iii = three ss = 1/2
IV, iv = four iss = 1 1/2
V, v = five iiss =2 1/2
VI, VI =Six iiiss =3 1/2
VII, vii = seven ivss = 4 1/2
VIII, viii = eight