Milligram is 0.001 gram units.
Milligrams to Troy ounces Converter — mg to oz t
Convert Milligram (mg) to Troy ounce (oz t) using the exact conversion factor (1 milligram = 0.0000321507 troy ounce). See the formula, worked examples, and conversion table.
Milligrams 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-6 / 0.0311034768.
Mass uses the kilogram as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Milligrams to Troy ounces
Weight conversions between Milligram 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: Milligram is 0.001 gram units, and a troy ounce is exactly 31.1034768 grams.
Formula
troy ounces = milligrams × 0.0000321507465686
This factor comes from each unit's defined relationship to the category's base unit: 1 milligram equals 0.000001 base units, and 1 troy ounce equals 0.0311034768 base units, so dividing one by the other gives the direct milligram-to-troy ounce factor of 0.0000321507465686.
Simple example
1 mg × 0.00003215074657 = 0.0000321507 oz t
1 milligram = 0.0000321507 troy ounces.
Real-world example
50 mg × 0.00003215074657 = 0.0016075373 oz t
50 milligrams = 0.0016075373 troy ounces.
Conversion table
| Milligram (mg) | Troy ounce (oz t) |
|---|---|
| 1 mg | 0.0000321507 oz t |
| 5 mg | 0.0001607537 oz t |
| 10 mg | 0.0003215075 oz t |
| 25 mg | 0.0008037687 oz t |
| 50 mg | 0.0016075373 oz t |
| 100 mg | 0.0032150747 oz t |
Reverse conversion: Troy ounce to Milligram
0.0000321507 oz t × 31103.4768 = 0.9999985516 mg
0.0000321507 troy ounces = 0.9999985516 milligrams.
milligrams = troy ounces × 31103.4768
For a page dedicated to this direction, see Troy ounce to Milligram.
Understanding the Milligram (mg)
Milligram is 0.001 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 milligram?
1 milligram equals 0.0000321507 troy ounces, using the exact defined conversion factor rather than an estimate.
How do I convert milligram to troy ounce?
Multiply the milligram value by 0.00003215074657. The converter above does this instantly to whatever precision you set.
How do I convert troy ounce back to milligram?
Use the reverse factor: 1 troy ounce equals 31,103.4768 milligrams. You can also use the swap control in the converter above to flip the direction instantly.
What is a milligram?
Milligram (mg) is a unit of mass/weight.
What is a troy ounce?
Troy ounce (oz t) is a unit of mass/weight.
Is the milligram to troy ounce conversion exact?
Yes. Both milligram and troy ounce are defined by fixed standards rather than physical artifacts, so the factor of 0.00003215074657 used above is exact to as many digits as you choose to display.