Ounces to Milligrams Converter
Convert ounces (avoirdupois) (oz) to milligrams (mg), with the formula, a conversion table and exact factors.
Change the values and press Calculate to work out your own figures.
Enter a weight, choose its unit and the unit you want. The answer is exact until it is shown, and the same value appears in every other unit.
Show the working
- 1 oz = 28349.523125 mg
- 1 × 28349.523125 = 28349.523125 mg
How to convert ounces to milligrams
1 oz = 28,349.523125 mg, so multiply by 28,349.523125 to go from ounces (avoirdupois) to milligrams. Going the other way, 1 mg = 3.52739619496 × 10⁻⁵ oz.
mg = oz × 28,349.523125 oz = mg × 3.52739619496
Worked example:
1 oz = 28349.523125 mg 5 × 28349.523125 = 141747.615625 mg
Ounces to milligrams table
| Ounces | Milligrams |
|---|---|
| 1 oz | 28,349.523125 mg |
| 2 oz | 56,699.04625 mg |
| 3 oz | 85,048.569375 mg |
| 4 oz | 113,398.0925 mg |
| 5 oz | 141,747.615625 mg |
| 6 oz | 170,097.13875 mg |
| 7 oz | 198,446.661875 mg |
| 8 oz | 226,796.185 mg |
| 9 oz | 255,145.708125 mg |
| 10 oz | 283,495.23125 mg |
| 15 oz | 425,242.846875 mg |
| 20 oz | 566,990.4625 mg |
| 25 oz | 708,738.078125 mg |
| 30 oz | 850,485.69375 mg |
| 40 oz | 1,133,980.925 mg |
| 50 oz | 1,417,476.15625 mg |
| 75 oz | 2,126,214.23438 mg |
| 100 oz | 2,834,952.3125 mg |
| 250 oz | 7,087,380.78125 mg |
| 500 oz | 14,174,761.5625 mg |
| 1000 oz | 28,349,523.125 mg |
About the units
- Ounces (oz)
- Ounces (avoirdupois), a US customary unit. Definition: NIST Handbook 44 Appendix C (US customary units; US gallon = 231 in³).
- Milligrams (mg)
- Milligrams, a metric unit. Definition: BIPM SI Brochure.