An avoirdupois dram is 1/16 ounce.
Drams to Milligrams Converter — dr to mg
Convert Dram (dr) to Milligram (mg) using the exact conversion factor (1 dram = 1,771.845195 milligram). See the formula, worked examples, and conversion table.
Drams to Milligrams converter
Converter
Mass/Weight Converter
Convert SI mass, imperial weight, jewelry, atomic, and astronomy mass units.
Context values
Some unit families need one extra value for a physically accurate result.
Milligram is 0.001 gram units.
Result = input x 0.001771845195 / 1e-6.
Mass uses the kilogram as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Drams to Milligrams
Weight conversions between Dram and Milligram come up constantly in everyday commerce, shipping, and cooking, since US packaging is usually labeled in pounds while most of the rest of the world uses kilograms. Specifically: An avoirdupois dram is 1/16 ounce, and milligram is 0.001 gram units.
Formula
milligrams = drams × 1771.84519531
This factor comes from each unit's defined relationship to the category's base unit: 1 dram equals 0.00177184519531 base units, and 1 milligram equals 0.000001 base units, so dividing one by the other gives the direct dram-to-milligram factor of 1771.84519531.
Simple example
1 dr × 1771.845195 = 1,771.845195 mg
1 dram = 1,771.845195 milligrams.
Real-world example
50 dr × 1771.845195 = 88,592.25977 mg
50 drams = 88,592.25977 milligrams.
Conversion table
| Dram (dr) | Milligram (mg) |
|---|---|
| 1 dr | 1,771.845195 mg |
| 5 dr | 8,859.225977 mg |
| 10 dr | 17,718.45195 mg |
| 25 dr | 44,296.12988 mg |
| 50 dr | 88,592.25977 mg |
| 100 dr | 177,184.5195 mg |
Reverse conversion: Milligram to Dram
1 mg × 0.0005643833912 = 0.0005643834 dr
1 milligram = 0.0005643834 drams.
drams = milligrams × 0.000564383391193
For a page dedicated to this direction, see Milligram to Dram.
Understanding the Dram (dr)
An avoirdupois dram is 1/16 ounce.
Understanding the Milligram (mg)
Milligram is 0.001 gram units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many milligrams are in 1 dram?
1 dram equals 1,771.845195 milligrams, using the exact defined conversion factor rather than an estimate.
How do I convert dram to milligram?
Multiply the dram value by 1771.845195. The converter above does this instantly to whatever precision you set.
How do I convert milligram back to dram?
Use the reverse factor: 1 milligram equals 0.0005643834 drams. You can also use the swap control in the converter above to flip the direction instantly.
What is a dram?
Dram (dr) is a unit of mass/weight.
What is a milligram?
Milligram (mg) is a unit of mass/weight.
Is the dram to milligram conversion exact?
Yes. Both dram and milligram are defined by fixed standards rather than physical artifacts, so the factor of 1771.845195 used above is exact to as many digits as you choose to display.