An avoirdupois dram is 1/16 ounce.
Drams to Petagrams Converter — dr to Pg
Convert Dram (dr) to Petagram (Pg) using the exact conversion factor (1 dram = 1.771845e-15 petagram). See the formula, worked examples, and conversion table.
Drams to Petagrams 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.
Petagram is 1000000000000000 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 Petagrams
Weight conversions between Dram and Petagram 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 petagram is 1000000000000000 gram units.
Formula
petagrams = drams × 1.771845e-15
This factor comes from each unit's defined relationship to the category's base unit: 1 dram equals 0.00177184519531 base units, and 1 petagram equals 1e+12 base units, so dividing one by the other gives the direct dram-to-petagram factor of 1.771845e-15.
Simple example
1 dr × 1.771845e-15 = 1.771845e-15 Pg
1 dram = 1.771845e-15 petagrams.
Real-world example
50 dr × 1.771845e-15 = 8.859226e-14 Pg
50 drams = 8.859226e-14 petagrams.
Conversion table
| Dram (dr) | Petagram (Pg) |
|---|---|
| 1 dr | 1.771845e-15 Pg |
| 5 dr | 8.859226e-15 Pg |
| 10 dr | 1.771845e-14 Pg |
| 25 dr | 4.429613e-14 Pg |
| 50 dr | 8.859226e-14 Pg |
| 100 dr | 1.771845e-13 Pg |
Reverse conversion: Petagram to Dram
1.771845e-15 Pg × 5.643834e+14 = 0.9999998898 dr
1.771845e-15 petagrams = 0.9999998898 drams.
drams = petagrams × 5.643834e+14
For a page dedicated to this direction, see Petagram to Dram.
Understanding the Dram (dr)
An avoirdupois dram is 1/16 ounce.
Understanding the Petagram (Pg)
Petagram is 1000000000000000 gram units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many petagrams are in 1 dram?
1 dram equals 1.771845e-15 petagrams, using the exact defined conversion factor rather than an estimate.
How do I convert dram to petagram?
Multiply the dram value by 1.771845e-15. The converter above does this instantly to whatever precision you set.
How do I convert petagram back to dram?
Use the reverse factor: 1 petagram equals 5.643834e+14 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 petagram?
Petagram (Pg) is a unit of mass/weight.
Is the dram to petagram conversion exact?
Yes. Both dram and petagram are defined by fixed standards rather than physical artifacts, so the factor of 1.771845e-15 used above is exact to as many digits as you choose to display.