Stones to Ounces Converter
Convert stones to ounces — multiply by 224. Results update as you type; exact factors shown.
One stone is 224 ounces — see the exact factor, not a rounded rule of thumb.
How the stones to ounces converter works
Mass converts through the kilogram. The avoirdupois pound has been exactly 0.45359237 kg since 1959, so an ounce is 28.349523125 g and a stone (14 lb) is 6.35029318 kg. A US short ton is 2,000 lb; an imperial long ton is 2,240 lb; a metric tonne is 1,000 kg.
The US uses customary units (US gallon, short ton, °F) in daily life; NIST SP 811 gives the exact SI factors.
Common mass conversions
| From | To | Units |
|---|---|---|
| 0.5 st | 112 oz | stones to ounces |
| 1 st | 224 oz | stone to ounces |
| 2 st | 448 oz | stones to ounces |
| 5 st | 1,120 oz | stones to ounces |
| 8 st | 1,792 oz | stones to ounces |
| 10 st | 2,240 oz | stones to ounces |
| 11 st | 2,464 oz | stones to ounces |
| 12 st | 2,688 oz | stones to ounces |
| 13 st | 2,912 oz | stones to ounces |
| 14 st | 3,136 oz | stones to ounces |
| 15 st | 3,360 oz | stones to ounces |
| 20 st | 4,480 oz | stones to ounces |
Units in this converter and their exact factors
| Unit | Symbol | One unit in kilograms |
|---|---|---|
| milligram | mg | 0.000001 kilogram |
| gram | g | 0.001 kilogram |
| kilogram | kg | 1 kilogram |
| tonne (metric ton) | t | 1,000 kilogram |
| ounce | oz | 0.0283495231 kilogram |
| pound | lb | 0.45359237 kilogram |
| stone | st | 6.35029318 kilogram |
| US ton (short) | US ton | 907.18474 kilogram |
| imperial ton (long) | long ton | 1,016.0469088 kilogram |
FAQFrequently asked questions about mass conversion
How many ounces in a stone?
224.
What is 10 stone in ounces?
2,240 ounces.
What is a stone in kilograms?
6.35 kg.
Why does the UK still use stones?
For body weight only, by habit — medical records use kilograms.
What is 12 stone in pounds?
168 pounds.
Where these figures come from
- BIPM — The International System of Units (SI Brochure, 9th edition) — definitions of the base and derived units.
- NIST Special Publication 811 — Guide for the Use of the International System of Units — the exact conversion factors used here.
- National Institute of Standards and Technology (NIST) — United States's national measurement authority.
Last checked: September 2026. Conversion factors are fixed by definition and do not change with tax years or regulations.