Yoctogram is 1e-24 gram units.
Yoctograms to Zeptograms Converter — yg to zg
Convert Yoctogram (yg) to Zeptogram (zg) using the exact conversion factor (1 yoctogram = 0.001 zeptogram). See the formula, worked examples, and conversion table.
Yoctograms 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-27 / 1e-24.
Mass uses the kilogram as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Yoctograms to Zeptograms
Weight conversions between Yoctogram 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: Yoctogram is 1e-24 gram units, and zeptogram is 1e-21 gram units.
Formula
zeptograms = yoctograms × 0.001
This factor comes from each unit's defined relationship to the category's base unit: 1 yoctogram equals 1e-27 base units, and 1 zeptogram equals 1e-24 base units, so dividing one by the other gives the direct yoctogram-to-zeptogram factor of 0.001.
Simple example
1 yg × 0.001 = 0.001 zg
1 yoctogram = 0.001 zeptograms.
Real-world example
50 yg × 0.001 = 0.05 zg
50 yoctograms = 0.05 zeptograms.
Conversion table
| Yoctogram (yg) | Zeptogram (zg) |
|---|---|
| 1 yg | 0.001 zg |
| 5 yg | 0.005 zg |
| 10 yg | 0.01 zg |
| 25 yg | 0.025 zg |
| 50 yg | 0.05 zg |
| 100 yg | 0.1 zg |
Reverse conversion: Zeptogram to Yoctogram
0.001 zg × 1000 = 1 yg
0.001 zeptograms = 1 yoctogram.
yoctograms = zeptograms × 1000
For a page dedicated to this direction, see Zeptogram to Yoctogram.
Understanding the Yoctogram (yg)
Yoctogram is 1e-24 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 yoctogram?
1 yoctogram equals 0.001 zeptograms, using the exact defined conversion factor rather than an estimate.
How do I convert yoctogram to zeptogram?
Multiply the yoctogram value by 0.001. The converter above does this instantly to whatever precision you set.
How do I convert zeptogram back to yoctogram?
Use the reverse factor: 1 zeptogram equals 1,000 yoctograms. You can also use the swap control in the converter above to flip the direction instantly.
What is a yoctogram?
Yoctogram (yg) is a unit of mass/weight.
What is a zeptogram?
Zeptogram (zg) is a unit of mass/weight.
Is the yoctogram to zeptogram conversion exact?
Yes. Both yoctogram and zeptogram are defined by fixed standards rather than physical artifacts, so the factor of 0.001 used above is exact to as many digits as you choose to display.