Convert Ounces to Troy Ounces (oz to oz t)
1 ounce (oz) equals 0.9114583333 troy ounces (oz t).
1 oz = 0.9114583333 oz t
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk ounce to troy ounce converter to paste a column from Excel.
How to Convert Ounce to Troy Ounce
- 1 oz = 0.9114583333 oz t
- 1 oz t = 1.097142857 oz
- Example: convert 16 oz to oz t: 16 oz = 16 × 0.9114583333 oz t = 14.58333333 oz t
Reference conditions. oz: Avoirdupois system: 1 lb = 16 oz = 7000 grains = 0.45359237 kg exactly (1959 agreement).
Formula
oz t = oz × 0.9114583333333
or oz t = oz ÷ 1.097142857143
Derivation from SI units:
- 1 oz = 1/16 lb = 28.349523125 g (exact)
- 1 oz t = 480 gr = 31.1034768 g (exact)
- 1 oz = 0.028349523125 kg ÷ 0.0311034768 kg per oz t = 0.9114583333333 oz t
Both units are defined exactly, so the factor is exact. Ounce definition: ounce; Troy Ounce definition: troy ounce.
Worked examples
- 1 oz is 0.9114583333 oz t.
1 oz × 0.9114583333 = 0.9114583333 oz t - 16 oz (one pound) of silver is 14.58333333 oz t.
16 oz × 0.9114583333 = 14.58333333 oz t
Ounce to Troy Ounce conversion table
| Ounces (oz) | Troy Ounces (oz t) |
|---|---|
| 0.25 oz | 0.2278645833 oz t |
| 0.5 oz | 0.4557291667 oz t |
| 1 oz | 0.9114583333 oz t |
| 2 oz | 1.822916667 oz t |
| 3 oz | 2.734375 oz t |
| 4 oz | 3.645833333 oz t |
| 5 oz | 4.557291667 oz t |
| 6 oz | 5.46875 oz t |
| 8 oz | 7.291666667 oz t |
| 10 oz | 9.114583333 oz t |
| 12 oz | 10.9375 oz t |
| 16 oz | 14.58333333 oz t |
| 20 oz | 18.22916667 oz t |
| 24 oz | 21.875 oz t |
| 32 oz | 29.16666667 oz t |
| 64 oz | 58.33333333 oz t |
Where it's used
Ordinary ounces are converted to troy ounces when pricing gold, silver and platinum, which are quoted per troy ounce. Multiply by about 0.9115.
Ounce to other weight and mass units
| Conversion | 1 oz equals |
|---|---|
| ounce to kilogram | 0.02834952313 kg |
| ounce to gram | 28.34952313 g |
| ounce to milligram | 28349.52313 mg |
| ounce to microgram | 28349523.13 µg |
| ounce to metric ton | 0.00002834952313 t |
| ounce to pound | 0.0625 lb |
| ounce to stone | 0.004464285714 st |
| ounce to short ton | 0.00003125 ton (US) |
| ounce to long ton | 0.00002790178571 ton (UK) |
| ounce to grain | 437.5 gr |
| ounce to troy ounce | 0.9114583333 oz t |
| ounce to carat | 141.7476156 ct |
Frequently asked questions
Why are gold prices per troy ounce?
Precious metals have traditionally been weighed in the troy system; a troy ounce is 480 grains = 31.1034768 g.
How many troy ounces are in 1 ounce?
1 oz = 0.9114583333 oz t.
How do I convert ounces to troy ounces?
Multiply the value in oz by 0.9114583333, or divide it by 1.097142857. For example, 16 oz × 0.9114583333 = 14.58333333 oz t.
Is the oz to oz t conversion exact?
Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).
Sources
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "ounce (avoirdupois) (oz)".
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "ounce (troy or apothecary)".
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Ounces to Troy Ounces (oz to oz t). Retrieved October 18, 2026, from https://scientificconverters.com/mass/ounces-to-troy-ounces/
IEEE
Scientific Converters, "Convert Ounces to Troy Ounces (oz to oz t)," scientificconverters.com. Accessed: Oct. 18, 2026. [Online]. Available: https://scientificconverters.com/mass/ounces-to-troy-ounces/