Convert Ounces to Stone
1 ounce (oz) equals 0.004464285714 stone (st).
1 oz = 0.004464285714 st
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk ounce to stone converter to paste a column from Excel.
How to Convert Ounce to Stone
- 1 oz = 0.004464285714 st
- 1 st = 224 oz
- Example: convert 15 oz to st: 15 oz = 15 × 0.004464285714 st = 0.06696428571 st
Reference conditions. oz: Avoirdupois system: 1 lb = 16 oz = 7000 grains = 0.45359237 kg exactly (1959 agreement). st: Avoirdupois system: 1 lb = 16 oz = 7000 grains = 0.45359237 kg exactly (1959 agreement).
Formula
st = oz ÷ 224
Derivation from SI units:
- 1 oz = 1/16 lb = 28.349523125 g (exact)
- 1 st = 14 lb = 6.35029318 kg (exact)
- 1 oz = 0.028349523125 kg ÷ 6.35029318 kg per st = 0.004464285714286 st
Both units are defined exactly, so the factor is exact. Ounce definition: ounce; Stone definition: stone.
Worked examples
- A reading of 4 oz converts to 0.01785714286 st.
4 oz × 0.004464285714 = 0.01785714286 st - A value of 12 oz is 0.05357142857 st.
12 oz × 0.004464285714 = 0.05357142857 st
Ounce to Stone conversion table
| Ounces (oz) | Stone (st) |
|---|---|
| 0.25 oz | 0.001116071429 st |
| 0.5 oz | 0.002232142857 st |
| 1 oz | 0.004464285714 st |
| 2 oz | 0.008928571429 st |
| 3 oz | 0.01339285714 st |
| 4 oz | 0.01785714286 st |
| 5 oz | 0.02232142857 st |
| 6 oz | 0.02678571429 st |
| 8 oz | 0.03571428571 st |
| 10 oz | 0.04464285714 st |
| 12 oz | 0.05357142857 st |
| 16 oz | 0.07142857143 st |
| 20 oz | 0.08928571429 st |
| 24 oz | 0.1071428571 st |
| 32 oz | 0.1428571429 st |
| 64 oz | 0.2857142857 st |
Where it's used
Ounces are used for food and parcel weights in the US, 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.
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
How many stone are in 1 ounce?
1 oz = 0.004464285714 st.
How do I convert ounces to stone?
Multiply the value in oz by 0.004464285714, or divide it by 224. For example, 15 oz × 0.004464285714 = 0.06696428571 st.
Is the oz 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 (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, 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 Ounces to Stone. Retrieved October 17, 2026, from https://scientificconverters.com/mass/ounces-to-stone/
IEEE
Scientific Converters, "Convert Ounces to Stone," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/mass/ounces-to-stone/