Ounces to Milligrams converter
Convert ounces (oz) to milligrams (mg) — results update instantly as you type.
Ounces to Milligrams
1 oz = 28,349.523125 mg
How to convert Ounces to Milligrams
Mass measurements range from milligrams in a pharmacy to metric tons in shipping. The metric world weighs in grams and kilograms, while the US and UK still use ounces, pounds, and stones — this converter handles all of them exactly.
All units convert through the gram. One pound is defined as exactly 453.59237 grams and one ounce as exactly 28.349523125 grams, so results are precise to the international definition.
Formula
oz × 28,349.523125 = mg
Multiply your ounces value by 28,349.523125 to get milligrams. For the reverse, divide by the same factor.
Ounces to Milligrams conversion table
| Ounces | Milligrams |
|---|---|
| 1 oz | 28,349.523125 mg |
| 2 oz | 56,699.04625 mg |
| 5 oz | 141,747.615625 mg |
| 10 oz | 283,495.23125 mg |
| 25 oz | 708,738.078125 mg |
| 100 oz | 2,834,952.3125 mg |
Common use cases
- Body weight between kilograms, pounds, and stones
- Recipe ingredients between grams and ounces
- Luggage allowances between kilograms and pounds
- Freight and cargo in metric tons
Frequently asked questions
One kilogram equals approximately 2.20462 pounds. Conversely, one pound is exactly 0.45359237 kilograms.