Convert Ounces to Milligrams
Convert Ounces (oz) to Milligrams (mg) instantly and accurately.
Conversion Formula
mg = oz × 28349.52313
About Ounces
The avoirdupois ounce (oz) is 1/16 of a pound, equal to approximately 28.35 grams. It is the everyday ounce used in the United States and United Kingdom for food portions, household quantities, and general trade. US food packages, recipe measurements, and nutrition labels reference ounces; a standard stick of butter is 4 oz, a can of soup typically 10.75 oz, and a baseball weighs 5-5.25 oz. Unlike the troy ounce (31.10 g) used for precious metals, the avoirdupois ounce (28.35 g) is lighter.
About Milligrams
A milligram (mg) is one thousandth of a gram (10⁻³ g). It is the primary unit for pharmaceutical dosing: aspirin tablets are typically 500 mg, ibuprofen 200-400 mg, and melatonin supplements 0.5-10 mg. Precious metal assay results and alloy compositions are specified in milligrams per kilogram (mg/kg = ppm). Nutritional labels worldwide list mineral content in milligrams - the recommended daily intake of iron is 8-18 mg, calcium 1000 mg, and sodium under 2300 mg. A grain of rice weighs about 25-30 mg, and a medium eyelash approximately 0.1 mg.
Quick Reference Table
| Ounces (oz) | Milligrams (mg) |
|---|---|
| 1 oz | 28349.5 mg |
| 2 oz | 56699 mg |
| 5 oz | 141748 mg |
| 10 oz | 283495 mg |
| 25 oz | 708738 mg |
| 50 oz | 1417480 mg |
| 100 oz | 2834950 mg |