Grams to Stone
Convert grams (g) to stone (st). Both measure mass and weight, and the conversion comes up in cooking, shipping, fitness work.
The Formula
``
stone = grams × 0.000157473044418
grams = stone × 6350.29318
`
One gram is 1.5747e-4 stone, and one stone is 6,350.29 grams.
Conversion Table
| Grams | Stone |
|---|---|
| 1 g | 1.5747e-4 st |
| 2 g | 3.1495e-4 st |
| 5 g | 7.8737e-4 st |
| 10 g | 0.001575 st |
| 25 g | 0.003937 st |
| 50 g | 0.007874 st |
| 100 g | 0.015747 st |
| 500 g | 0.078737 st |
| 1,000 g | 0.157473 st |
The Other Direction
| Stone | Grams |
|---|---|
| 1 st | 6,350.29 g |
| 2 st | 12,700.59 g |
| 5 st | 31,751.47 g |
| 10 st | 63,502.93 g |
| 25 st | 158,757.33 g |
| 50 st | 317,514.66 g |
| 100 st | 635,029.32 g |
| 500 st | 3,175,146.59 g |
| 1,000 st | 6,350,293.18 g |
What Each Unit Is
Grams (g) — one thousandth of a kilogram. The metric unit for small masses; cooking, nutrition and postage all work in grams.
Stone (st) — exactly 14 pounds, or 6.35029318 kilograms. A medieval trade weight that varied by commodity until standardised at 14 lb in 1835.
A Sense of Scale
A paperclip is about 1 g- A sheet of A4 is 5 g
- A tennis ball is 58 g
- British body weight is often given in stone and pounds
- An adult is typically 9–14 stone
Precision
The factor 0.000157473044418 is rounded. For engineering work carry more digits than the table above, and round only at the end — rounding at each step compounds.
Watch Out For
- Effectively British-only. US sources give body weight in pounds alone.
In Code
`javascript
const gramToStone = (value) => value * 0.000157473044418;
``
Where This Conversion Comes Up
- Cooking
- Shipping
- Fitness
- Medicine
- Manufacturing
How Many Decimals Do You Need?
Rounding the factor costs accuracy, and how much depends on the factor. Converting 137 g with the factor truncated at each decimal place:
| Decimals kept | Factor | 137 g becomes | Error |
|---|---|---|---|
| 0 | 0 | 0 | 100.0000% |
| 1 | 0 | 0 | 100.0000% |
| 2 | 0 | 0 | 100.0000% |
| 3 | 0 | 0 | 100.0000% |
| 4 | 0.0002 | 0.0274 | 27.0059% |
The right number of significant figures is set by your input, not by the converter. If you measured grams to three significant figures, the answer in stone is only good to three — writing more digits claims precision the measurement never had.