How to Convert Grams to Stone (g 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 grams into stone by hand, with examples and a quick-reference table.
The conversion
To convert grams to stone, multiply the value by 0.000157473. To go the other way, divide by the same number (or multiply by 6,350.29318). Because the factor is tiny, scientific notation keeps the numbers manageable.
Stone = grams × 0.000157473
Worked examples
- 3 g = 0.000472 st
- 12.5 g = 0.001968 st
- 75 g = 0.01181 st
Grams to Stone table
| Grams | Stone |
|---|---|
| 1 g | 0.000157 st |
| 2 g | 0.000315 st |
| 5 g | 0.000787 st |
| 10 g | 0.001575 st |
| 20 g | 0.003149 st |
| 25 g | 0.003937 st |
| 50 g | 0.007874 st |
| 100 g | 0.015747 st |
| 250 g | 0.039368 st |
| 500 g | 0.078737 st |
| 1,000 g | 0.157473 st |
Common questions
Is g 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 Grams converter.
Mistakes to avoid
Mixing similar-sounding units
US and imperial gallons, pints and tons are different sizes, and decimal kilobytes differ from binary kibibytes.
Rounding the factor too early
Using 3 instead of 3.28 for feet per metre introduces an error of almost 9% before you have started.
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.
Background
A conversion table is handy for common values, but a calculator is faster and avoids interpolation errors for anything in between.
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.
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.
For any value, use the Grams to Stone Converter or browse all weight converters.
Run your own numbers: Grams to Stone Converter