An avoirdupois dram is 1/16 ounce.
Drams to Grains Converter — dr to gr
Convert Dram (dr) to Grain (gr) using the exact conversion factor (1 dram = 27.34375 grain). See the formula, worked examples, and conversion table.
Drams to Grains 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.
A grain is exactly 64.79891 milligrams.
Result = input x 0.001771845195 / 6.479891e-5.
Mass uses the kilogram as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Drams to Grains
Weight conversions between Dram and Grain 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 a grain is exactly 64.79891 milligrams.
Formula
grains = drams × 27.34375
This factor comes from each unit's defined relationship to the category's base unit: 1 dram equals 0.00177184519531 base units, and 1 grain equals 0.00006479891 base units, so dividing one by the other gives the direct dram-to-grain factor of 27.34375.
Simple example
1 dr × 27.34375 = 27.34375 gr
1 dram = 27.34375 grains.
Real-world example
50 dr × 27.34375 = 1,367.1875 gr
50 drams = 1,367.1875 grains.
Conversion table
| Dram (dr) | Grain (gr) |
|---|---|
| 1 dr | 27.34375 gr |
| 5 dr | 136.71875 gr |
| 10 dr | 273.4375 gr |
| 25 dr | 683.59375 gr |
| 50 dr | 1,367.1875 gr |
| 100 dr | 2,734.375 gr |
Reverse conversion: Grain to Dram
27.34375 gr × 0.03657142857 = 1 dr
27.34375 grains = 1 drams.
drams = grains × 0.0365714285714
For a page dedicated to this direction, see Grain to Dram.
Understanding the Dram (dr)
An avoirdupois dram is 1/16 ounce.
Understanding the Grain (gr)
A grain is exactly 64.79891 milligrams.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many grains are in 1 dram?
1 dram equals 27.34375 grains, using the exact defined conversion factor rather than an estimate.
How do I convert dram to grain?
Multiply the dram value by 27.34375. The converter above does this instantly to whatever precision you set.
How do I convert grain back to dram?
Use the reverse factor: 1 grain equals 0.0365714286 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 grain?
Grain (gr) is a unit of mass/weight.
Is the dram to grain conversion exact?
Yes. Both dram and grain are defined by fixed standards rather than physical artifacts, so the factor of 27.34375 used above is exact to as many digits as you choose to display.