Zeptogram is 1e-21 gram units.
Zeptograms to Troy ounces Converter — zg to oz t
Convert Zeptogram (zg) to Troy ounce (oz t) using the exact conversion factor (1 zeptogram = 3.215075e-23 troy ounce). See the formula, worked examples, and conversion table.
Zeptograms to Troy ounces 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.
A troy ounce is exactly 31.1034768 grams.
Result = input x 1e-24 / 0.0311034768.
Mass uses the kilogram as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Zeptograms to Troy ounces
Weight conversions between Zeptogram and Troy ounce 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 a troy ounce is exactly 31.1034768 grams.
Formula
troy ounces = zeptograms × 3.215075e-23
This factor comes from each unit's defined relationship to the category's base unit: 1 zeptogram equals 1e-24 base units, and 1 troy ounce equals 0.0311034768 base units, so dividing one by the other gives the direct zeptogram-to-troy ounce factor of 3.215075e-23.
Simple example
1 zg × 3.215075e-23 = 3.215075e-23 oz t
1 zeptogram = 3.215075e-23 troy ounces.
Real-world example
50 zg × 3.215075e-23 = 1.607537e-21 oz t
50 zeptograms = 1.607537e-21 troy ounces.
Conversion table
| Zeptogram (zg) | Troy ounce (oz t) |
|---|---|
| 1 zg | 3.215075e-23 oz t |
| 5 zg | 1.607537e-22 oz t |
| 10 zg | 3.215075e-22 oz t |
| 25 zg | 8.037687e-22 oz t |
| 50 zg | 1.607537e-21 oz t |
| 100 zg | 3.215075e-21 oz t |
Reverse conversion: Troy ounce to Zeptogram
3.215075e-23 oz t × 3.110348e+22 = 1.000000107 zg
3.215075e-23 troy ounces = 1.000000107 zeptograms.
zeptograms = troy ounces × 3.110348e+22
For a page dedicated to this direction, see Troy ounce to Zeptogram.
Understanding the Zeptogram (zg)
Zeptogram is 1e-21 gram units.
Understanding the Troy ounce (oz t)
A troy ounce is exactly 31.1034768 grams.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many troy ounces are in 1 zeptogram?
1 zeptogram equals 3.215075e-23 troy ounces, using the exact defined conversion factor rather than an estimate.
How do I convert zeptogram to troy ounce?
Multiply the zeptogram value by 3.215075e-23. The converter above does this instantly to whatever precision you set.
How do I convert troy ounce back to zeptogram?
Use the reverse factor: 1 troy ounce equals 3.110348e+22 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 troy ounce?
Troy ounce (oz t) is a unit of mass/weight.
Is the zeptogram to troy ounce conversion exact?
Yes. Both zeptogram and troy ounce are defined by fixed standards rather than physical artifacts, so the factor of 3.215075e-23 used above is exact to as many digits as you choose to display.