How to Convert Stone to Tonnes (st to t)
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 stone into tonnes by hand, with examples and a quick-reference table.
The conversion
To convert stone to tonnes, multiply the value by 0.0063502932. To go the other way, divide by the same number (or multiply by 157.4730444178). For a quick estimate, multiply by about 0.0064.
Tonnes = stone × 0.0063502932
Worked examples
- 3 st = 0.019051 t
- 12.5 st = 0.079379 t
- 75 st = 0.476272 t
Stone to Tonnes table
| Stone | Tonnes |
|---|---|
| 1 st | 0.00635 t |
| 2 st | 0.012701 t |
| 5 st | 0.031751 t |
| 10 st | 0.063503 t |
| 20 st | 0.127006 t |
| 25 st | 0.158757 t |
| 50 st | 0.317515 t |
| 100 st | 0.635029 t |
| 250 st | 1.5876 t |
| 500 st | 3.1751 t |
| 1,000 st | 6.3503 t |
Common questions
Is st to t 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 Tonnes to Stone converter.
Mistakes to avoid
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.
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.
Dropping the units
A bare number without a unit is easy to misread later. Always write the unit with the result.
Background
A conversion table is handy for common values, but a calculator is faster and avoids interpolation errors for anything in between.
For everyday use, three or four significant figures are usually enough. Engineering, science and trade documents may need more, and rounding should happen only at the end of a calculation.
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.
For any value, use the Stone to Tonnes Converter or browse all weight converters.
Run your own numbers: Stone to Tonnes Converter