Ounce to Milligram
Convert oz to mg instantly — free, no sign-up.
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About the Ounce (oz)
The Ounce is commonly used in the US for food packaging and postal weights, equal to one sixteenth of a pound.
About the Milligram (mg)
The Milligram is one thousandth of a gram, used for dosing in medicine and very small chemical quantities.
How to convert oz to mg
- Enter the value in oz in the box above.
- The mg equivalent updates instantly.
- Use the swap button to convert mg back to oz just as easily.