Ounces to troy ounces
Type a value in ounces to see it in troy ounces straight away, or type in the second box to convert back.
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How to use it
- Type the value in the ounces box.
- Read the result in troy ounces as you type, and pick the precision you need.
- Swap the direction to convert back, or copy the result.
How it is calculated
oz t = oz × 0.9114583333
Multiply the value in ounces by 0.9114583333 to get troy ounces.
Example
To convert 25 oz to troy ounces: 25 × 0.9114583333 = 22.7865 oz t.
Conversion table
| Ounces (oz) | Troy ounces (oz t) |
|---|---|
| 1 | 0.911458 |
| 2 | 1.82292 |
| 3 | 2.73438 |
| 5 | 4.55729 |
| 10 | 9.11458 |
| 20 | 18.2292 |
| 25 | 22.7865 |
| 50 | 45.5729 |
| 100 | 91.1458 |
| 250 | 227.865 |
| 500 | 455.729 |
| 1,000 | 911.458 |
About the units
- Ounce
- The avoirdupois ounce is 1/16 of a pound, exactly 28.349523125 grams.
- Troy ounce
- The ounce used to price gold and silver worldwide, equal to 480 grains or exactly 31.1034768 grams.
Limits and caveats
- Results are rounded for display and computed with the browser's floating point precision (about 15 significant digits).
- Both unit factors are exact by their official definitions.
Questions about this tool
How many troy ounces are in one ounce?
1 oz = 0.911458 oz t exactly.
How do I convert ounces to troy ounces?
Use oz t = oz × 0.9114583333. For example, 25 oz = 22.7865 oz t.
How many ounces are in one troy ounce?
1 oz t = 1.09714 oz.
Are mass and weight the same thing?
Strictly no: mass is the amount of matter, in kilograms, while weight is the force of gravity on it, in newtons. Scales display mass, so everyday language uses the two words interchangeably.
What is the difference between an ounce and a troy ounce?
An ordinary ounce is 28.349523125 grams and is used for food and goods, while a troy ounce is 31.1034768 grams and is used to price gold and silver.