Convert ounce to milligram
1 oz = 28,349.52313 mg
1 oz = 28,300 mg
1 oz in every mass unit
| microgram | 28,300,000 μg |
| milligram | 28,300 mg |
| gram | 28.3 g |
| kilogram | 0.0283 kg |
| metric tonne | 0.0000283 t |
| ounce | 1 oz |
| pound | 0.0625 lb |
| stone | 0.00446 st |
| US short ton | 0.0000313 ton |
| grain | 438 gr |
| unified atomic mass unit (dalton) | 1.71e+25 u |
How the conversion works
Multiply by 28,349.52313 to go from ounce to milligram, or divide by it to go back. Every conversion on this site routes through the SI value (kg) rather than a table of pairwise factors, so a round-trip returns exactly what you started with.
Going the other way? milligram to ounce — 1 mg = 0.00003527396195 oz.
ounce to milligram — common values
| 1 oz | 28,349.523 mg |
| 2 oz | 56,699.046 mg |
| 3 oz | 85,048.569 mg |
| 5 oz | 141,747.62 mg |
| 10 oz | 283,495.23 mg |
| 15 oz | 425,242.85 mg |
| 20 oz | 566,990.46 mg |
| 25 oz | 708,738.08 mg |
| 50 oz | 1,417,476.2 mg |
| 75 oz | 2,126,214.2 mg |
| 100 oz | 2,834,952.3 mg |
| 250 oz | 7,087,380.8 mg |
| 500 oz | 14,174,762 mg |
| 1000 oz | 28,349,523 mg |