Definitions
Historically, in different parts of the world, at different points in time, and for different applications, the ounce (or its translation) has referred to broadly similar but different standards of mass.
| ounce variant | equivalent in grams | equivalent in grains |
|---|---|---|
| International avoirdupois ounce | 28.3495231 | 437.5 |
| International troy ounce | 31.1034768 | 480 |
| Apothecaries' ounce | ||
| Maria Theresa ounce | 28.0668 | |
| Spanish ounce | 28.75 | |
| Dutch metric ounce | 100 | |
| Chinese metric ounce | 50 |
Read more about this topic: Ounce
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