An avoirdupois dram is 1/16 ounce.
Drams to Nanograms Converter — dr to ng
Convert Dram (dr) to Nanogram (ng) using the exact conversion factor (1 dram = 1,771,845,195 nanogram). See the formula, worked examples, and conversion table.
Drams to Nanograms 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.
Nanogram is 1e-9 gram units.
Result = input x 0.001771845195 / 1e-12.
Mass uses the kilogram as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Drams to Nanograms
Weight conversions between Dram and Nanogram 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 nanogram is 1e-9 gram units.
Formula
nanograms = drams × 1771845195.31
This factor comes from each unit's defined relationship to the category's base unit: 1 dram equals 0.00177184519531 base units, and 1 nanogram equals 1e-12 base units, so dividing one by the other gives the direct dram-to-nanogram factor of 1771845195.31.
Simple example
1 dr × 1771845195 = 1,771,845,195 ng
1 dram = 1,771,845,195 nanograms.
Real-world example
50 dr × 1771845195 = 88,592,259,770 ng
50 drams = 88,592,259,770 nanograms.
Conversion table
| Dram (dr) | Nanogram (ng) |
|---|---|
| 1 dr | 1,771,845,195 ng |
| 5 dr | 8,859,225,977 ng |
| 10 dr | 17,718,451,950 ng |
| 25 dr | 44,296,129,880 ng |
| 50 dr | 88,592,259,770 ng |
| 100 dr | 177,184,519,500 ng |
Reverse conversion: Nanogram to Dram
1 ng × 5.643834e-10 = 5.643834e-10 dr
1 nanogram = 5.643834e-10 drams.
drams = nanograms × 5.643834e-10
For a page dedicated to this direction, see Nanogram to Dram.
Understanding the Dram (dr)
An avoirdupois dram is 1/16 ounce.
Understanding the Nanogram (ng)
Nanogram is 1e-9 gram units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many nanograms are in 1 dram?
1 dram equals 1,771,845,195 nanograms, using the exact defined conversion factor rather than an estimate.
How do I convert dram to nanogram?
Multiply the dram value by 1771845195. The converter above does this instantly to whatever precision you set.
How do I convert nanogram back to dram?
Use the reverse factor: 1 nanogram equals 5.643834e-10 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 nanogram?
Nanogram (ng) is a unit of mass/weight.
Is the dram to nanogram conversion exact?
Yes. Both dram and nanogram are defined by fixed standards rather than physical artifacts, so the factor of 1771845195 used above is exact to as many digits as you choose to display.