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Ounce to Milligram
Convert Ounce to Milligram and get the exact value instantly.
1 oz = 28349.52312 mg
About this conversion
To convert Ounce to Milligram, multiply the number of Ounce by 28349.52312.
Weight units split between the metric world (grams, kilograms) and imperial habits (pounds, ounces, stones), which is why shipping labels, recipes and gym plates rarely line up without a conversion.
Conversion table
| Ounce (oz) | Milligram (mg) |
|---|---|
| 1 oz | 28349.52312 mg |
| 2 oz | 56699.04625 mg |
| 5 oz | 141747.6156 mg |
| 10 oz | 283495.2313 mg |
| 100 oz | 2834952.313 mg |
How to use this converter
- Enter your Ounce value
Type any number into the Ounce field. It starts at 1 so you can read the rate straight away.
- Read the Milligram result
The amount in Milligram updates as you type, so there is no button to press and nothing to wait for.
- Swap or keep exploring
Use the swap control to flip the direction, or pick a related conversion from the list below.
Frequently asked
- How many Milligram are in one Ounce?
- One Ounce equals 28349.52312 mg. Enter any amount above to get an exact figure for your own value.
- Is this converter accurate?
- Yes. It uses the exact international definition of each unit and computes on your device, so the only rounding is for display.
- Do you upload the numbers I enter?
- No. The Ounce to Milligram conversion runs entirely in your browser tab, and nothing you type is sent to a server.
- Does it work on my phone?
- Yes. It runs in any modern mobile browser and keeps working offline once the page has loaded.
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