Milligrams to Ounces Converter
Convert milligrams to ounces — divide by 28,349.5. Results update as you type; exact factors shown.
One milligram is 0 ounces — see the exact factor, not a rounded rule of thumb.
How the milligrams to ounces converter works
Mass converts through the kilogram. The avoirdupois pound has been exactly 0.45359237 kg since 1959, so an ounce is 28.349523125 g and a stone (14 lb) is 6.35029318 kg. A US short ton is 2,000 lb; an imperial long ton is 2,240 lb; a metric tonne is 1,000 kg.
Australia is fully metric under the National Measurement Act 1960; imperial units appear only in trade with the US and in older documents.
Common mass conversions
| From | To | Units |
|---|---|---|
| 100 mg | 0.0035 oz | milligrams to ounces |
| 500 mg | 0.0176 oz | milligrams to ounces |
| 1,000 mg | 0.0353 oz | milligrams to ounces |
| 5,000 mg | 0.1764 oz | milligrams to ounces |
| 10,000 mg | 0.3527 oz | milligrams to ounces |
| 28,350 mg | 1 oz | milligrams to ounces |
| 50,000 mg | 1.7637 oz | milligrams to ounces |
| 100,000 mg | 3.5274 oz | milligrams to ounces |
| 250,000 mg | 8.8185 oz | milligrams to ounces |
| 453,592 mg | 16 oz | milligrams to ounces |
| 500,000 mg | 17.637 oz | milligrams to ounces |
| 1,000,000 mg | 35.274 oz | milligrams to ounces |
Units in this converter and their exact factors
| Unit | Symbol | One unit in kilograms |
|---|---|---|
| milligram | mg | 0.000001 kilogram |
| gram | g | 0.001 kilogram |
| kilogram | kg | 1 kilogram |
| tonne (metric ton) | t | 1,000 kilogram |
| ounce | oz | 0.0283495231 kilogram |
| pound | lb | 0.45359237 kilogram |
| stone | st | 6.35029318 kilogram |
| US ton (short) | US ton | 907.18474 kilogram |
| imperial ton (long) | long ton | 1,016.0469088 kilogram |
FAQFrequently asked questions about mass conversion
How many ounces is 1,000 mg?
0.0353 oz — a gram is a very small fraction of an ounce.
What is 28,350 mg?
One ounce.
What is 453,592 mg?
One pound.
Which ounce is this?
The avoirdupois ounce used for everyday weight, not the troy ounce used for precious metals.
What is a milligram?
A thousandth of a gram — roughly the mass of a grain of sand.
Where these figures come from
- BIPM — The International System of Units (SI Brochure, 9th edition) — definitions of the base and derived units.
- NIST Special Publication 811 — Guide for the Use of the International System of Units — the exact conversion factors used here.
- National Measurement Institute (NMI) — Australia's national measurement authority.
Last checked: September 2026. Conversion factors are fixed by definition and do not change with tax years or regulations.