Density and Mass
oztomg
Convert ounces (avoirdupois) (oz) to milligrams (mg).
Factor1 oz = 28349.52 mg
Converter
oz
Accepts numbers or expressions, e.g. 150 + 14.7
Result
mg
Rendered to 6 significant figures.
Formula
Formula
mg = oz × 28349.52
Multiply any value in ounces (avoirdupois) by 28349.52 to obtain the value in milligrams.
Worked example
Convert 1 oz to mg.
- 01Start with 1 oz.
- 02Multiply by the conversion factor: 1 × 28349.52 = 28349.5 mg.
Result1 oz = 28349.5 mg
Conversion table
| oz | mg |
|---|---|
| 1 | 28350 |
| 2 | 56699 |
| 5 | 1.4175e+5 |
| 10 | 2.8350e+5 |
| 20 | 5.6699e+5 |
| 50 | 1.4175e+6 |
| 100 | 2.8350e+6 |
| 200 | 5.6699e+6 |
| 500 | 1.4175e+7 |
| 1000 | 2.835e+7 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from oz to mg?
1 oz equals 28349.52 mg. To convert, multiply the value in ounces (avoirdupois) by 28349.52.
How do I convert 1 oz to mg?
1 oz = 28349.5 mg. For any value, multiply by 28349.52.
How do I convert mg back to oz?
Divide by the same factor — or equivalently, multiply by 3.527396e-5. So 1 mg = 3.5274e-5 oz.
When would I need to convert ounce (avoirdupois) to milligram?
Mass conversions appear in material balances, reagent dosing, and reconciling vendor specifications across imperial/metric systems.
Is the conversion exact?
Yes. Both oz and mg are defined by exact SI relationships, so the displayed factor is exact (any rounding shown is only for display).