Online calculator to convert ounces to milligrams (oz to mg) with formulas, examples, and tables. Our conversions provide a quick and easy way to convert between Weight or Mass units.
Conversion Calculator
Enter your value in the conversion calculator below.
Convert oz to mg
TIP: If the result of your conversion is 0, try increasing the "Decimals".
Conversion Definitions
The following is a list of definitions relating to conversions between ounces and milligrams.
What is an ounce (oz)?
An ounce is a unit of mass in both US Customary Units as well as the Imperial System. The symbol for ounce is oz. There are 0.00003527 ounces in a milligram.
What is a milligram (mg)?
A milligram is a unit of mass in the Metric System. The symbol for milligram is mg. There are 28,349.5231 milligrams in an ounce.
Conversion Formula
Let's take a closer look at the conversion formula so that you can do these conversions yourself with a calculator or with an old-fashioned pencil and paper.
The formula to convert from ounces to mg is:
mg = oz x 28,349.5231
Conversion Example
Next, let's look at an example showing the work and calculations that are involved in converting from ounces to milligrams (oz to mg).
Ounce to Milligram Conversion Example
Task: Convert 4 ounces to milligrams (show work) Formula: oz x 28,349.5231 = mg Calculations: 4 oz x 28,349.5231 = 113,398.0924 mg Result: 4 oz is equal to 113,398.0924 mg
Conversion Table
For quick reference purposes, below is a conversion table that you can use to convert from ounce to mg.
Ounces to Milligrams Conversion Chart
| ounces (oz) | milligrams (mg) |
|---|---|
| 1 oz | 28,349.5231 mg |
| 2 oz | 56,699.0462 mg |
| 3 oz | 85,048.5693 mg |
| 4 oz | 113,398.0924 mg |
| 5 oz | 141,747.6155 mg |
| 6 oz | 170,097.1386 mg |
| 7 oz | 198,446.6617 mg |
| 8 oz | 226,796.1848 mg |
| 9 oz | 255,145.7079 mg |
| 10 oz | 283,495.231 mg |
| 20 oz | 566,990.462 mg |
| 30 oz | 850,485.693 mg |
| 40 oz | 1,133,980.924 mg |
| 50 oz | 1,417,476.155 mg |
| 75 oz | 2,126,214.2325 mg |
| 100 oz | 2,834,952.31 mg |
| 250 oz | 7,087,380.775 mg |
| 500 oz | 14,174,761.55 mg |
| 750 oz | 21,262,142.325 mg |
| 1,000 oz | 28,349,523.1 mg |
| 2,500 oz | 70,873,807.75 mg |
| 5,000 oz | 141,747,615.5 mg |
| 7,500 oz | 212,621,423.25 mg |
| 10,000 oz | 283,495,231 mg |
| 25,000 oz | 708,738,077.5 mg |
| 50,000 oz | 1,417,476,155 mg |
| 75,000 oz | 2,126,214,232.5 mg |
| 100,000 oz | 2,834,952,310 mg |
| 250,000 oz | 7,087,380,775 mg |
Related Units
This table provides a summary of the Weight or Mass units within their respective measurement systems.
| Unit | Symbol | Measurement System |
|---|---|---|
| ounces | oz | US Customary Units/Imperial System |
| pounds | lbs or lb | US Customary Units/Imperial System |
| stones | st | Imperial System |
| short tons (US tons) | T | US Customary Units |
| long tons (Imperial tons) | long tn | Imperial System |
| nanograms | ng | Metric System |
| micrograms | mcg or μg | Metric System |
| milligrams | mg | Metric System |
| centigrams | cg | Metric System |
| decigrams | dg | Metric System |
| grams | g | Metric System |
| decagrams | dag or dkg | Metric System |
| hectograms | hg | Metric System |
| kilograms | kg | Metric System |
| metric tons (tonnes) | t | Metric System |
| gigagrams | Gg | Metric System |
| teragrams | Tg | Metric System |
Note: For Weight and Mass conversions, US Customary Units and the Imperial System are equivalent.
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