Ounce To Milligram Conversion Chart

Ounce (oz) Milligram (mg)
0.01 oz283.49523125 mg
0.1 oz2834.9523125 mg
1 oz28349.523125 mg
2 oz56699.04625 mg
5 oz141747.615625 mg
10 oz283495.23125 mg
20 oz566990.4625 mg
50 oz1417476.15625 mg
100 oz2834952.3125 mg
500 oz14174761.5625 mg
1000 oz28349523.125 mg

Convert from ounce to milligram formula

Total milligram = Total ounce x 28349.523125

For example, if you want to convert 5 Ounce to Milligram then,

5 oz = 5 x 28349.523125 = 141747.615625 mg

Convert from milligram to ounce formula

Total ounce =
Total milligram
141747.615625 mg
= 5 oz


A unit of weight of one sixteenth of a pound avoirdupois (approximately 28 grams). The ounce is still a standard unit in the United States. In the United Kingdom it ceased to be a legal unit of measure in 2000, but is still in general usage on an informal basis.


A unit of measurement of mass in the metric system equal to a thousandth of a gram, and equivalent to 0.0154 grain.