Table 8-1. Measuring equivalents
| System of Weights | System of Volume Measures | Linear Measure |
| AVOIRDUPOIS Primary unit of weight is the grain 437.5 grains = 1 ounce (av. oz.) 16.0 ounces = 1 pound (av. lb.) | ||
| APOTHECARY Primary unit of weight is the grain. 20 grains (gr) = 1 scruple ( ℈ ) 3 scruples = 1 dram ( &ounce; ) 8 drams (480gr) = 1 ounce ( &ounce; ) 12 ounces = 1 pound (lb) | APOTHECARY 60 minims (m) = 1 fluid dram ( &ounce; ) 8 fluid drams = 1 fluid ounce ( &ounce; ) 16 fluid ounces = 1 pint (0) 2 pints = 1 quart (qt.) 4 quarts = 1 gallon (Cong. or gal.) | |
| METRIC Primary unit of weight is the gram 10000.000 grams = 1 kilogram (kg) 100.000 grams = 1 hectogram (hg) 10.000 grams = 1 dekagram (dkg) 1.000 gram = 1 gram (gm) 0.1 gram = 1 decigram (dg) 0.01 gram = 1 centigram (cg) 0.001 gram = 1 milligram (mg) | METRIC Primary unit of weight is the liter 10000.000 liters = 1 kiloliter (kl) 100.000 liters = 1 hectoliter (hl) 10.000 liters = 1 dekaliter (dkl) 1.000 liter = 1 liter (gl) 0.1 liter = 1 deciliter (dl) 0.01 liter = 1 centiliter (cl) 0.001 liter = 1 milliliter (ml) | METRIC Primary unit of weight is the meter 10000.000 meters = 1 kilometer (km) 100.000 meters = 1 hectometer (hm) 10.000 meters = 1 dekameter (dkm) 1.000 meter = 1 meter (m) 0.1 meter = 1 decimeter (dm) 0.01 meter = 1 centimeter (cm) 0.001 meter = 1 millimeter (mm) |
NOTE: The relationship of the basic units in the Metric System should be noted. The meter, which is 1/40,000,000 of the earth's popular circumference, is the natural standard. The volume contained in 1/10 of a meter cubed is 1 liter. The weiht of 1 cubic centimeter of distilled water is 1 gram. Grams of water are approximately equivalent at all temperature ranges. Current usage prefers that ml rather than cc be used since it has been found that 1000 cc do not equal exactly 1 liter.