Femtogram is 1e-15 gram units.
Femtograms to Zeptograms Converter — fg to zg
Convert Femtogram (fg) to Zeptogram (zg) using the exact conversion factor (1 femtogram = 1,000,000 zeptogram). See the formula, worked examples, and conversion table.
Femtograms to Zeptograms 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.
Zeptogram is 1e-21 gram units.
Result = input x 1e-18 / 1e-24.
Mass uses the kilogram as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Femtograms to Zeptograms
Weight conversions between Femtogram and Zeptogram 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 zeptogram is 1e-21 gram units.
Formula
zeptograms = femtograms × 1000000
This factor comes from each unit's defined relationship to the category's base unit: 1 femtogram equals 1e-18 base units, and 1 zeptogram equals 1e-24 base units, so dividing one by the other gives the direct femtogram-to-zeptogram factor of 1000000.
Simple example
1 fg × 1000000 = 1,000,000 zg
1 femtogram = 1,000,000 zeptograms.
Real-world example
50 fg × 1000000 = 50,000,000 zg
50 femtograms = 50,000,000 zeptograms.
Conversion table
| Femtogram (fg) | Zeptogram (zg) |
|---|---|
| 1 fg | 1,000,000 zg |
| 5 fg | 5,000,000 zg |
| 10 fg | 10,000,000 zg |
| 25 fg | 25,000,000 zg |
| 50 fg | 50,000,000 zg |
| 100 fg | 100,000,000 zg |
Reverse conversion: Zeptogram to Femtogram
1 zg × 0.000001 = 0.000001 fg
1 zeptogram = 0.000001 femtograms.
femtograms = zeptograms × 0.000001
For a page dedicated to this direction, see Zeptogram to Femtogram.
Understanding the Femtogram (fg)
Femtogram is 1e-15 gram units.
Understanding the Zeptogram (zg)
Zeptogram is 1e-21 gram units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many zeptograms are in 1 femtogram?
1 femtogram equals 1,000,000 zeptograms, using the exact defined conversion factor rather than an estimate.
How do I convert femtogram to zeptogram?
Multiply the femtogram value by 1000000. The converter above does this instantly to whatever precision you set.
How do I convert zeptogram back to femtogram?
Use the reverse factor: 1 zeptogram equals 0.000001 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 zeptogram?
Zeptogram (zg) is a unit of mass/weight.
Is the femtogram to zeptogram conversion exact?
Yes. Both femtogram and zeptogram are defined by fixed standards rather than physical artifacts, so the factor of 1000000 used above is exact to as many digits as you choose to display.