Ounces to Milligrams Converter
Convert ounces (oz) to milligrams (mg) instantly. Weight units matter at the wet market, where older stalls and Chinese medical halls still quote prices per kati or tael, and when following American recipes in ounces and pounds.
Result
- Milligrams
- 28,349.52 mg
How to use the ounces to milligrams converter
- Enter the ounces (oz).
- The results update as you type, or press Calculate.
- Read the milligrams first, then the supporting figures below it.
Formula
Milligrams = ounces × 28,349.523125
Worked example
For example, with these inputs:
- Ounces (oz): 1
the calculator returns:
- Milligrams: 28,349.52 mg
Ounces to Milligrams table
| Ounces | Milligrams |
|---|---|
| 1 oz | 28,349.52 mg |
| 2 oz | 56,699.05 mg |
| 5 oz | 141,747.62 mg |
| 10 oz | 283,495.23 mg |
| 20 oz | 566,990.46 mg |
| 25 oz | 708,738.08 mg |
| 50 oz | 1,417,476.16 mg |
| 100 oz | 2,834,952.31 mg |
| 250 oz | 7,087,380.78 mg |
| 500 oz | 14,174,761.56 mg |
| 1,000 oz | 28,349,523.13 mg |
About this conversion
Weight units matter at the wet market, where older stalls and Chinese medical halls still quote prices per kati or tael, and when following American recipes in ounces and pounds.
Many conversion factors are exact by definition. The inch has been defined as exactly 2.54 centimetres since 1959, and the pound as exactly 0.45359237 kilograms, so conversions involving them can be as precise as you need.
For everyday use, three or four significant figures are usually enough. Engineering, science and trade documents may need more, and rounding should happen only at the end of a calculation.
Frequently asked questions
How many milligrams are in one ounce?
1 oz = 28,349.52 mg.
How do I convert oz to mg?
Milligrams = ounces × 28,349.523125.