Ounces to milligrams (oz to mg) conversion factor is 28349.5231. To find out how many milligrams in ounces, multiply the ounce value by 28349.5231.
1 Ounce = 28 349.5231 Milligrams
Ounce is an imperial and US Customary mass unit. Troy ounce is used for the measurement of precious metals, gold, silver etc. The abbreviation is "oz".
Milligram is a small unit of mass in the metric system. The abbreviation is "mg".