Convert ounces to milligrams quickly and accurately using this free online converter
Common in cooking, food packaging, and ingredient measurements.
💡 Most recipes outside the US use grams; US recipes often use ounces.
mg = oz × 28,349.50
Example: 1 oz × 28,349.50 = 28,349.50 mg
Use grams for precision recipes; ounces for US recipes.
Common uses: cooking, food prep, and packaging.
How do I convert oz to mg?
Multiply the value in Ounces by 28,349.50. For example: 10 oz = 283,495.00 mg.
When should I use Milligrams instead of Ounces?
Use grams for precision recipes; ounces for US recipes.
Is this converter accurate?
Yes. We use internationally recognized conversion factors, updated to current standards.
| Ounces (oz) | Milligrams (mg) |
|---|---|
| 1 oz | 28,349.50 mg |
| 2 oz | 56,699.00 mg |
| 5 oz | 141,747.50 mg |
| 10 oz | 283,495.00 mg |
| 20 oz | 566,990.00 mg |
| 50 oz | 1,417,475.00 mg |
| 100 oz | 2,834,950.00 mg |
| 200 oz | 5,669,900.00 mg |
| 500 oz | 14,174,750.00 mg |
| 1000 oz | 28,349,500.00 mg |