Ounces to Stones Converter
Convert ounces to stones — 224 ounces to the stone. Results update as you type; exact factors shown.
One ounce is 0.0045 stones — see the exact factor, not a rounded rule of thumb.
How the ounces to stones 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.
Australia is fully metric under the National Measurement Act 1960; imperial units appear only in trade with the US and in older documents.
Common mass conversions
| From | To | Units |
|---|---|---|
| 16 oz | 0.0714 st | ounces to stones |
| 32 oz | 0.1429 st | ounces to stones |
| 112 oz | 0.5 st | ounces to stones |
| 224 oz | 1 st | ounces to stones |
| 448 oz | 2 st | ounces to stones |
| 500 oz | 2.2321 st | ounces to stones |
| 1,000 oz | 4.4643 st | ounces to stones |
| 1,120 oz | 5 st | ounces to stones |
| 1,500 oz | 6.6964 st | ounces to stones |
| 2,000 oz | 8.9286 st | ounces to stones |
| 2,240 oz | 10 st | ounces to stones |
| 3,360 oz | 15 st | ounces to stones |
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 — fourteen pounds of sixteen ounces.
What is 1,000 ounces in stones?
4.46 stones.
Where is the stone used?
Body weight in the UK and Ireland, and almost nowhere else.
Why 14 pounds?
It was standardised for the wool trade in 1389 and stuck.
What is 2,240 ounces?
10 stones, or 140 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 Measurement Institute (NMI) — Australia's national measurement authority.
Last checked: September 2026. Conversion factors are fixed by definition and do not change with tax years or regulations.