1 ounce to milligrams
1 oz = 28,349.52 mg. Change the amount below, or read the formula and the reference table further down.
1 ounce equals
milligrams
1 oz = 28,349.52 mg
The formula
Ounces and milligrams both measure weight & mass from the same zero, so a single multiplier does the job.
mg = oz × 28,349.52
Going the other way? Convert milligrams to ounces.
Ounces to milligrams table
Values either side of 1 oz.
| Ounces (oz) | Milligrams (mg) |
|---|---|
| -4 | -113,398.09 |
| -3.5 | -99,223.33 |
| -3 | -85,048.57 |
| -2.5 | -70,873.81 |
| -2 | -56,699.05 |
| -1.5 | -42,524.28 |
| -1 | -28,349.52 |
| -0.5 | -14,174.76 |
| 0 | 0 |
| 0.5 | 14,174.76 |
| 1 | 28,349.52 |
| 1.5 | 42,524.28 |
| 2 | 56,699.05 |
| 2.5 | 70,873.81 |
| 3 | 85,048.57 |
| 3.5 | 99,223.33 |
| 4 | 113,398.09 |
| 4.5 | 127,572.85 |
| 5 | 141,747.62 |
| 5.5 | 155,922.38 |
| 6 | 170,097.14 |
Questions people ask
- How many milligrams are in a ounce?
- One ounce equals 28,349.52 milligrams.
- How do I convert ounces to milligrams by hand?
- Multiply the number of ounces by 28,349.52. For a rough check, 28,349.52 is close enough for most everyday use.
- What is 1 ounce in milligrams?
- 1 ounce is 28,349.52 milligrams.
Calcuit generates this page from a unit table, so the factors here match every other page on the site.