# Milligrams to Drams (mg to dr) Source: https://www.unitconvertercalculator.com/weight/milligrams-to-drams/ **1 mg = 0.00056438339119329 dr** One milligram equals approximately 0.0005644 drams, or about 5.644 times 10-4 drams. The milligram at one thousandth of a gram is the universal pharmaceutical unit, while the avoirdupois dram at about 1.772 grams is an obsolescent Imperial unit once used for spices and small goods. About 1,772 milligrams make one dram. ## Formula Apply the conversion factor ## Conversion Table | Milligrams (mg) | Drams (dr) | |---|---| | 10 mg | 0.0056438339119329 dr | | 50 mg | 0.028219169559664 dr | | 100 mg | 0.056438339119329 dr | | 250 mg | 0.14109584779832 dr | | 500 mg | 0.28219169559664 dr | | 1000 mg | 0.56438339119329 dr | | 2500 mg | 1.4109584779832 dr | | 5000 mg | 2.8219169559664 dr | | 10000 mg | 5.6438339119329 dr | | 50000 mg | 28.219169559664 dr | | 100000 mg | 56.438339119329 dr | | 500000 mg | 282.19169559664 dr | ## Units ### Milligram (mg) A metric unit of mass equal to one thousandth of a gram, or one millionth of a kilogram. Commonly used in medicine and pharmacology. ### Dram (dr) A dram (avoirdupois) is a unit of mass equal to 1/16 of an ounce or 1/256 of a pound (1.7718451953125 grams). Historically used in pharmacy and old cooking recipes. ## Background This conversion crosses from the metric pharmaceutical world to the historical avoirdupois system. The dram was once used in cooking and apothecary measurement but has been almost entirely replaced by the gram and milligram. The conversion is useful for interpreting historical recipes and pharmaceutical records that used drams. ## Good to Know The dram and the milligram are grandmother and grandchild in the family of pharmaceutical weight units. The dram measured medicines for centuries - apothecaries weighed their compounds in drams on brass beam balances. The milligram inherited this role in the 20th century, bringing decimal precision to a task that had relied on manual skill and approximate measures. The transition was gradual and peaceful - unlike many measurement reforms, the replacement of drams by milligrams caused no riots, no resistance, and no nostalgia. The milligram was simply better at the same job. ## FAQ ### How many milligrams are in one dram? Approximately 1,771.85 milligrams. One avoirdupois dram is about 1.77185 grams, and each gram is 1,000 milligrams, giving about 1,772 milligrams per dram. ### Is the dram still used anywhere? The avoirdupois dram is nearly extinct. It occasionally appears in American shotgun ammunition specifications (powder charges in drams) and in some traditional cooking references. For all practical pharmaceutical and scientific purposes, the milligram has replaced it. ### Why is this conversion approximate? Because the dram is defined in the avoirdupois system (1/16 of an ounce, or 27.34375 grains) while the milligram is metric. The grain-to-gram bridge (1 grain = 0.06479891 grams) produces a non-terminating decimal. ## Non-Frequently Asked Questions ### If a recipe from 1850 says 'add 2 drams of cinnamon,' how many milligrams is that? About 3,544 milligrams or 3.544 grams. That is roughly three-quarters of a teaspoon of ground cinnamon - a reasonable amount for a Victorian-era spice cake. Historical recipes in drams translate to sensible modern quantities, which is reassuring evidence that Victorian cooks knew what they were doing. ### Is the dram the milligram's grandparent? In a sense. The dram served the apothecary and spice trades for centuries before the milligram existed. The milligram inherited the dram's role of measuring small, valuable quantities with precision. The dram retired gracefully in the 20th century, replaced by a metric unit that does everything it did but with decimal simplicity. ### How many aspirin tablets make a dram? At 325 milligrams per tablet, one dram (1,772 mg) equals about 5.45 aspirin tablets. A dram of aspirin was actually a common historical dose - physicians in the 19th century prescribed aspirin-like compounds (salicylates) in dram quantities. 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