Convert ounces to Troy Ounce
Western Europe · European Weight · active · modern
Conventional value The unit is customary but its modern value is settled and widely cited; the arithmetic itself is exact.
1 ounce = 0.911458 Troy Ounce
Troy Ounce = ounces × 0.91145765
Convert any amount
ounces to Troy Ounce table
| ounces | Troy Ounce |
|---|---|
| 0.25 ounces | 0.227864 Troy Ounce |
| 0.5 ounces | 0.455729 Troy Ounce |
| 1 ounce | 0.911458 Troy Ounce |
| 2 ounces | 1.82292 Troy Ounce |
| 3 ounces | 2.73437 Troy Ounce |
| 4 ounces | 3.64583 Troy Ounce |
| 5 ounces | 4.55729 Troy Ounce |
| 10 ounces | 9.11458 Troy Ounce |
| 20 ounces | 18.2292 Troy Ounce |
| 25 ounces | 22.7864 Troy Ounce |
| 50 ounces | 45.5729 Troy Ounce |
| 100 ounces | 91.1458 Troy Ounce |
About the Troy Ounce
International precious metal standard. 1 oz t = 31.1035g.
- Symbol
- oz t
- Value in SI
- 1 Troy Ounce = 0.0311035 kilogram
- Typical use
- precious-metals, jewellery
- Source
- UnitConvertLab measurement atlas
Every atlas conversion routes through the SI kilogram. See our methodology and data provenance pages for how these values are sourced and verified.
Related units and variant risk
Other european weight units in the Western Europe family, least settled first. If your figure came from a land record, invoice or historical document rather than a calculator, check these before assuming a single standard.
Related conversions
Frequently asked
How many Troy Ounce are in a ounce?
1 ounce = 0.911458 Troy Ounce. Multiply the number of ounces by 0.91145765 to get Troy Ounce.
What is Troy Ounce used for?
International precious metal standard. 1 oz t = 31.1035g. It is classified as active and dates from the modern period.
Is the Troy Ounce value exact?
Yes for practical purposes. UnitConvertLab converts every atlas unit through the SI kilogram, so the arithmetic itself introduces no rounding beyond the digits shown.
How reliable is this Troy Ounce conversion?
Conventional value — The unit is customary but its modern value is settled and widely cited; the arithmetic itself is exact. Source: UnitConvertLab measurement atlas.
Cite this page
UnitConvertLab. (2026). Convert ounces to Troy Ounce. UnitConvertLab. Retrieved from https://unitconvertlab.com/regional/ounce-to-troy-ounce
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