How to Convert Ounces to Stone (oz to st)
Weight units matter at the wet market, where older stalls and Chinese medical halls still quote prices per kati or tael, and when following American recipes in ounces and pounds. This guide shows how to convert ounces into stone by hand, with examples and a quick-reference table.
The conversion
To convert ounces to stone, multiply the value by 0.0044642857. To go the other way, divide by the same number (or multiply by 224). For a quick estimate, multiply by about 0.0045.
Stone = ounces × 0.0044642857
Worked examples
- 3 oz = 0.013393 st
- 12.5 oz = 0.055804 st
- 75 oz = 0.334821 st
Ounces to Stone table
| Ounces | Stone |
|---|---|
| 1 oz | 0.004464 st |
| 2 oz | 0.008929 st |
| 5 oz | 0.022321 st |
| 10 oz | 0.044643 st |
| 20 oz | 0.089286 st |
| 25 oz | 0.111607 st |
| 50 oz | 0.223214 st |
| 100 oz | 0.446429 st |
| 250 oz | 1.1161 st |
| 500 oz | 2.2321 st |
| 1,000 oz | 4.4643 st |
Common questions
Is oz to st exact?
The factors used here are the internationally defined values where they exist; results are rounded for display only.
How do I convert back?
Use the Stone to Ounces converter.
Mistakes to avoid
Forgetting squared and cubed units
Area and volume factors are the length factor squared or cubed, so 1 m² is about 10.76 sq ft, not 3.28.
Mixing similar-sounding units
US and imperial gallons, pints and tons are different sizes, and decimal kilobytes differ from binary kibibytes.
Multiplying when you should divide
Converting to a smaller unit gives a bigger number, and converting to a larger unit gives a smaller one. If your answer moves the wrong way, you have inverted the factor.
Background
Singapore adopted the metric system in the 1970s, replacing imperial units and traditional Chinese measures in most official uses. Metric units are now standard in schools, trade and government, but older units survive in property, markets and imported goods.
Many conversion factors are exact by definition. The inch has been defined as exactly 2.54 centimetres since 1959, and the pound as exactly 0.45359237 kilograms, so conversions involving them can be as precise as you need.
Writing the units next to every number while you work is the simplest way to avoid mistakes. If the units do not cancel to leave the one you want, the calculation is set up wrongly.
For any value, use the Ounces to Stone Converter or browse all weight converters.
Run your own numbers: Ounces to Stone Converter