Zeptogram is 1e-21 gram units.
Zeptograms to Drams Converter — zg to dr
Convert Zeptogram (zg) to Dram (dr) using the exact conversion factor (1 zeptogram = 5.643834e-22 dram). See the formula, worked examples, and conversion table.
Zeptograms to Drams 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.
An avoirdupois dram is 1/16 ounce.
Result = input x 1e-24 / 0.001771845195.
Mass uses the kilogram as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Zeptograms to Drams
Weight conversions between Zeptogram and Dram 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: Zeptogram is 1e-21 gram units, and an avoirdupois dram is 1/16 ounce.
Formula
drams = zeptograms × 5.643834e-22
This factor comes from each unit's defined relationship to the category's base unit: 1 zeptogram equals 1e-24 base units, and 1 dram equals 0.00177184519531 base units, so dividing one by the other gives the direct zeptogram-to-dram factor of 5.643834e-22.
Simple example
1 zg × 5.643834e-22 = 5.643834e-22 dr
1 zeptogram = 5.643834e-22 drams.
Real-world example
50 zg × 5.643834e-22 = 2.821917e-20 dr
50 zeptograms = 2.821917e-20 drams.
Conversion table
| Zeptogram (zg) | Dram (dr) |
|---|---|
| 1 zg | 5.643834e-22 dr |
| 5 zg | 2.821917e-21 dr |
| 10 zg | 5.643834e-21 dr |
| 25 zg | 1.410958e-20 dr |
| 50 zg | 2.821917e-20 dr |
| 100 zg | 5.643834e-20 dr |
Reverse conversion: Dram to Zeptogram
5.643834e-22 dr × 1.771845e+21 = 1.000000016 zg
5.643834e-22 drams = 1.000000016 zeptograms.
zeptograms = drams × 1.771845e+21
For a page dedicated to this direction, see Dram to Zeptogram.
Understanding the Zeptogram (zg)
Zeptogram is 1e-21 gram units.
Understanding the Dram (dr)
An avoirdupois dram is 1/16 ounce.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many drams are in 1 zeptogram?
1 zeptogram equals 5.643834e-22 drams, using the exact defined conversion factor rather than an estimate.
How do I convert zeptogram to dram?
Multiply the zeptogram value by 5.643834e-22. The converter above does this instantly to whatever precision you set.
How do I convert dram back to zeptogram?
Use the reverse factor: 1 dram equals 1.771845e+21 zeptograms. You can also use the swap control in the converter above to flip the direction instantly.
What is a zeptogram?
Zeptogram (zg) is a unit of mass/weight.
What is a dram?
Dram (dr) is a unit of mass/weight.
Is the zeptogram to dram conversion exact?
Yes. Both zeptogram and dram are defined by fixed standards rather than physical artifacts, so the factor of 5.643834e-22 used above is exact to as many digits as you choose to display.