Femtogram is 1e-15 gram units.
Femtograms to Drams Converter — fg to dr
Convert Femtogram (fg) to Dram (dr) using the exact conversion factor (1 femtogram = 5.643834e-16 dram). See the formula, worked examples, and conversion table.
Femtograms 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-18 / 0.001771845195.
Mass uses the kilogram as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Femtograms to Drams
Weight conversions between Femtogram 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: Femtogram is 1e-15 gram units, and an avoirdupois dram is 1/16 ounce.
Formula
drams = femtograms × 5.643834e-16
This factor comes from each unit's defined relationship to the category's base unit: 1 femtogram equals 1e-18 base units, and 1 dram equals 0.00177184519531 base units, so dividing one by the other gives the direct femtogram-to-dram factor of 5.643834e-16.
Simple example
1 fg × 5.643834e-16 = 5.643834e-16 dr
1 femtogram = 5.643834e-16 drams.
Real-world example
50 fg × 5.643834e-16 = 2.821917e-14 dr
50 femtograms = 2.821917e-14 drams.
Conversion table
| Femtogram (fg) | Dram (dr) |
|---|---|
| 1 fg | 5.643834e-16 dr |
| 5 fg | 2.821917e-15 dr |
| 10 fg | 5.643834e-15 dr |
| 25 fg | 1.410958e-14 dr |
| 50 fg | 2.821917e-14 dr |
| 100 fg | 5.643834e-14 dr |
Reverse conversion: Dram to Femtogram
5.643834e-16 dr × 1.771845e+15 = 1.000000016 fg
5.643834e-16 drams = 1.000000016 femtograms.
femtograms = drams × 1.771845e+15
For a page dedicated to this direction, see Dram to Femtogram.
Understanding the Femtogram (fg)
Femtogram is 1e-15 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 femtogram?
1 femtogram equals 5.643834e-16 drams, using the exact defined conversion factor rather than an estimate.
How do I convert femtogram to dram?
Multiply the femtogram value by 5.643834e-16. The converter above does this instantly to whatever precision you set.
How do I convert dram back to femtogram?
Use the reverse factor: 1 dram equals 1.771845e+15 femtograms. You can also use the swap control in the converter above to flip the direction instantly.
What is a femtogram?
Femtogram (fg) is a unit of mass/weight.
What is a dram?
Dram (dr) is a unit of mass/weight.
Is the femtogram to dram conversion exact?
Yes. Both femtogram and dram are defined by fixed standards rather than physical artifacts, so the factor of 5.643834e-16 used above is exact to as many digits as you choose to display.