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Common Systems of Weights and Measures
| COMMON SYSTEMS OF WEIGHTS AND MEASURES | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| METRIC SYSTEM | |||||||||
| Metric Weight | Metric Liquid Measure | ||||||||
| 1 femtogram (fg) | = | 0.001pg | 1 femtoliter (fL) | = | 0.001pL | ||||
| 1 picogram (pg) | = | 0.001ng | 1 picoliter (pL) | = | 0.001nL | ||||
| 1 nanogram (ng) | = | 0.001μg | 1 nanoliter (nL) | = | 0.001μL | ||||
| 1 microgram (μg) | = | 0.001mg | 1 microliter (μL) | = | 0.001mL | ||||
| 1 milligram (mg) | = | 0.001g | 1 milliliter (mL) | = | 0.001L | ||||
| 1 centigram (cg) | = | 0.01g | 1 centiliter (cL) | = | 0.01L (10 mL) | ||||
| 1 decigram (dg) | = | 0.1g | 1 deciliter (dL) | = | 0.1L (100 mL) | ||||
| 1 gram (g) | = | 1g | 1 liter (L) | = | 1L (1000 mL) | ||||
| 1 dekagram (dag) | = | 10g | 1 dekaliter (daL) | = | 10L | ||||
| 1 hectogram (hg) | = | 100g | 1 hectoliter (hL) | = | 100L | ||||
| 1 kilogram (kg) | = | 1000g | 1 kiloliter (kL) | = | 1000L | ||||
| APOTHECARY SYSTEM¹ | |||||||||
| Apothecary Weight Equivalents | Apothecary Volume Equivalents | ||||||||
| 1 grain² (gr) | = | 1 gr | 1 minim (♍) | = | 1 ♍ | ||||
| 1 scruple (℈) | = | 20 gr | 1 fluidram (fʒ) | = | 60 ♍ | ||||
| 1 dram (ʒ) | = | 60 gr = 3 ℈ | 1 fluid ounce (f℥) | = | 480 ♍ = 8 fʒ | ||||
| 1 ounce (℥) | = | 480 gr = 8 ʒ | 1 pint (pt or 0) | = | 7680 ♍ = 16 f℥ | ||||
| 1 pound (lb) | = | 5760 gr = 12 ℥ | 1 quart (qt) | = | 15360 ♍ = 32 f℥ | ||||
| 1 gallon (gal or cong) | = | 61440 ♍ = 128 f℥ | |||||||
| AVOIRDUPOIS SYSTEM³ | |||||||||
| Avoirdupois equivalents | |||||||||
| 1 ounce (oz) | = | 437.5 grains (gr) |
1 pound (lb) | = | 16 ounces (oz) = 7000 grains (gr) |
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¹Apothecary—used in preparation of pharmaceuticals. ²The grain in each of the above systems has the same value and thus serves as a basis for the interconversion of the other units. ³Avoirdupois is used by manufacturers and wholesalers. (Rev. 10/2023) |
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