Weight converter
Ounce to Milligram Converter
Convert oz to mg or reverse with one click. Type a value below for an instant result.
Ounce oz
Milligram mg
oz → mg · runs in your browser, no server
How to convert ounce to milligram
Ounce (oz) and Milligram (mg) both measure weight. Whether you are studying, traveling, cooking, or working on a project, converting between them should be fast and accurate.
This page converts ounce to milligram — ideal when American or British measurements need to match metric specs, school assignments, or international standards.
The standard relationship used on this page means that 1 ounce equals 28349.5 mg. Enter any number in the calculator — use the swap button to reverse the direction without leaving the page.
Converting 8 oz gives 226796 mg. This is a practical reference when switching between ounce and milligram for recipes, shipping labels, fitness tracking, and luggage limits.
Need milligram to ounce instead? Try our Milligram to Ounce converter. mg → oz
oz to mg conversion table
| oz | mg |
|---|---|
| 1 | 28349.5 |
| 2 | 56699 |
| 5 | 141747.5 |
| 10 | 283495 |
| 25 | 708737.5 |
| 50 | 1417475 |
| 100 | 2834950 |
| 200 | 5669900 |
| 500 | 14174750 |
mg to oz conversion table
Or click the swap button in the converter to switch from mg to oz.
| mg | oz |
|---|---|
| 1 | 0.000035 |
| 4 | 0.000141 |
| 8 | 0.000282 |
| 16 | 0.000564 |
| 32 | 0.001128 |
| 64 | 0.002257 |
| 128 | 0.004515 |
| 150 | 0.005291 |
| 200 | 0.007054 |
Frequently asked questions
How many milligrams are in 1 ounce? +
One ounce equals 28349.5 mg. Use the converter above for any value — results are calculated locally with full precision.
How do I convert oz to mg? +
Use the formula: mg = oz × 28349.5. Enter your value in the calculator and the result appears instantly. Click the swap button to convert mg back to oz.
How many ounces are in 1 milligram? +
One milligram equals 0.000035 oz. Swap the converter direction to work backwards from mg to oz.
What is 10 oz in mg? +
10 oz is 283495 mg. See the conversion table on this page for more common values.
When would I convert ounce to milligram? +
This conversion is useful for recipes, shipping labels, fitness tracking, and luggage limits. ConvertHub runs entirely in your browser — no data is uploaded to any server.
Is ounce to milligram the same as milligram to ounce? +
They are inverse operations. This page focuses on oz → mg with examples and tables for that direction. For mg → oz, use our separate milligram to ounce converter page.