In 1 milligrams there are 0.0000352740 ounces. Meanwhile in 1 ounces there are 28,349.523125 milligrams. Keep reading to learn more about each unit of measure and how they are calculated. Or just use the Ounces to Milligrams calculator above to convert any number.
* Values rounded to 6 decimal places for readability
To convert milligrams (mg) to ounces (oz), use this mass conversion factor:
Formula (mg to oz):
Quick example:
Tip for clean results:
To convert milligrams (mg) to ounces (oz), divide the milligram value by 28,349.523125.
Formula: oz = mg ÷ 28,349.523125
Milligrams (mg) measure mass.
Ounces (oz) also measure mass (weight in everyday use).
Fluid ounces (fl oz) measure volume, not mass. You can’t convert mg to fl oz without a substance and its density.
There are 28,349.523125 mg in 1 oz.
There are 0.000000035274 oz in 1 mg (about 3.5274 × 10⁻⁸ oz).
For a quick estimate, use 28,350 mg ≈ 1 oz.
This is close enough for rough work, but it’s not exact.
It’s the same conversion. Just make sure the label uses mg (mass) and you want oz (mass).
Example: 500 mg ÷ 28,349.523125 = 0.01764 oz (about 0.018 oz).
A milligram is very small. Since 1 oz equals 28,349.523125 mg, most mg values turn into a small decimal in ounces.
Yes, if you multiply by the reciprocal.
Formula: oz = mg × 0.000000035274
Dividing by 28,349.523125 is usually easier to read.
“Oz” usually means the avoirdupois ounce, used for most everyday weights in the US and other places. That’s the standard ounce used in most mg to oz conversions.
Here are a few useful examples:
5,000 mg ÷ 28,349.523125 = 0.17637 oz (about 0.176 oz).
Use more decimals when small amounts matter, like lab work or dose checks. For cooking or general use, rounding to 2 to 4 decimal places is often enough.
Only if you mean ounces by weight (oz). That conversion always works.
If you mean fluid ounces (fl oz), you need the liquid’s density because volume and mass aren’t the same.
The Calculate Box tool to convert milligrams to ounces uses the open source script Convert.js to convert units of measurement. To use this tool, simply type a milligrams value in the box and have it instantly converted to ounces.