Convert Troy Ounces to Stone
1 troy ounce (oz t) equals 0.004897959184 stone (st).
1 oz t = 0.004897959184 st
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk troy ounce to stone converter to paste a column from Excel.
How to Convert Troy Ounce to Stone
- 1 oz t = 0.004897959184 st
- 1 st = 204.1666667 oz t
- Example: convert 15 oz t to st: 15 oz t = 15 × 0.004897959184 st = 0.07346938776 st
Reference conditions. st: Avoirdupois system: 1 lb = 16 oz = 7000 grains = 0.45359237 kg exactly (1959 agreement).
Formula
st = oz t × 0.004897959183673
or st = oz t ÷ 204.1666666667
Derivation from SI units:
- 1 oz t = 480 gr = 31.1034768 g (exact)
- 1 st = 14 lb = 6.35029318 kg (exact)
- 1 oz t = 0.0311034768 kg ÷ 6.35029318 kg per st = 0.004897959183673 st
Both units are defined exactly, so the factor is exact. Troy Ounce definition: troy ounce; Stone definition: stone.
Worked examples
- A reading of 2 oz t converts to 0.009795918367 st.
2 oz t × 0.004897959184 = 0.009795918367 st - A value of 32.15 oz t is 0.1574693878 st.
32.15 oz t × 0.004897959184 = 0.1574693878 st
Troy Ounce to Stone conversion table
| Troy Ounces (oz t) | Stone (st) |
|---|---|
| 0.1 oz t | 0.0004897959184 st |
| 0.25 oz t | 0.001224489796 st |
| 0.5 oz t | 0.002448979592 st |
| 1 oz t | 0.004897959184 st |
| 2 oz t | 0.009795918367 st |
| 5 oz t | 0.02448979592 st |
| 10 oz t | 0.04897959184 st |
| 20 oz t | 0.09795918367 st |
| 32.15 oz t | 0.1574693878 st |
| 50 oz t | 0.2448979592 st |
| 100 oz t | 0.4897959184 st |
| 400 oz t | 1.959183673 st |
Where it's used
Troy Ounces are used for gold, silver and platinum prices, while stone appear in body weight in the UK and Ireland (e.g. 11 st 6 lb). Both measure mass (commonly called weight), so the conversion is a fixed factor.
Troy Ounce to other weight and mass units
| Conversion | 1 oz t equals |
|---|---|
| troy ounce to kilogram | 0.0311034768 kg |
| troy ounce to gram | 31.1034768 g |
| troy ounce to milligram | 31103.4768 mg |
| troy ounce to microgram | 31103476.8 µg |
| troy ounce to metric ton | 0.0000311034768 t |
| troy ounce to pound | 0.06857142857 lb |
| troy ounce to ounce | 1.097142857 oz |
| troy ounce to stone | 0.004897959184 st |
| troy ounce to short ton | 0.00003428571429 ton (US) |
| troy ounce to long ton | 0.0000306122449 ton (UK) |
| troy ounce to grain | 480 gr |
| troy ounce to carat | 155.517384 ct |
Frequently asked questions
How many stone are in 1 troy ounce?
1 oz t = 0.004897959184 st.
How do I convert troy ounces to stone?
Multiply the value in oz t by 0.004897959184, or divide it by 204.1666667. For example, 15 oz t × 0.004897959184 = 0.07346938776 st.
Is the oz t to st 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 (troy or apothecary)".
- 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, pound (avoirdupois).
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 Troy Ounces to Stone. Retrieved October 17, 2026, from https://scientificconverters.com/mass/troy-ounces-to-stone/
IEEE
Scientific Converters, "Convert Troy Ounces to Stone," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/mass/troy-ounces-to-stone/