Ounce (oz)
The ounce is used for small masses, food, precious metals, and English-language recipes.
History: the ounce goes back to the Roman uncia, one twelfth; in the avoirdupois system it became 1/16 of a pound.
Quickly convert ounces to milligrams without lookup tables or manual math.
This page is focused on converting ounces to milligrams. Type a number into the first field and the result appears immediately in the second field.
Example: 1 oz = 28349.523125 mg. Conversion formula: result = value × 0.028349523125 / 1.0E-6.
Use this converter for everyday calculations, study notes, engineering checks, and quick value verification without installing a separate app.
The ounce is used for small masses, food, precious metals, and English-language recipes.
History: the ounce goes back to the Roman uncia, one twelfth; in the avoirdupois system it became 1/16 of a pound.
The milligram is used for medicine doses, chemistry, vitamins, and very small masses.
History: the milligram became a decimal fraction of the gram and found wide use in pharmacy and chemistry.
Enter a value in the Ounce field. The converter applies the formula "result = value × 0.028349523125 / 1.0E-6" and immediately shows the result in milligrams.
1 oz = 28349.523125 mg.
Yes. Use the swap button or choose the reverse pair from the full conversion list.