A stone is 14 pounds.
Stones to Grams Converter — st to g
Convert Stone (st) to Gram (g) using the exact conversion factor (1 stone = 6,350.29318 gram). See the formula, worked examples, conversion table, unit comparison, history, and common uses.
Stones to Grams converter
Converter
Mass/Weight Converter
Convert SI mass, imperial weight, jewelry, atomic, and astronomy mass units.
Context values
Some unit families need one extra value for a physically accurate result.
A gram is one thousandth of a kilogram.
Result = input x 6.35029318 / 0.001.
Mass uses the kilogram as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Stones to Grams
Weight conversions between Stone and Gram come up constantly in everyday commerce, shipping, and cooking, since US packaging is usually labeled in pounds while most of the rest of the world uses kilograms. Stone is typically associated with united Kingdom and Ireland (body weight), while Gram is typically associated with standard small-mass unit worldwide.
Formula
grams = stones × 6350.29318
This factor comes from each unit's defined relationship to the category's base unit: 1 stone equals 6.35029318 base units, and 1 gram equals 0.001 base units, so dividing one by the other gives the direct stone-to-gram factor of 6350.29318.
Simple example
1 st × 6350.29318 = 6,350.29318 g
1 stone = 6,350.29318 grams.
Real-world example
50 st × 6350.29318 = 317,514.659 g
50 stones = 317,514.659 grams.
Conversion table
| Stone (st) | Gram (g) |
|---|---|
| 1 st | 6,350.29318 g |
| 5 st | 31,751.4659 g |
| 10 st | 63,502.9318 g |
| 25 st | 158,757.3295 g |
| 50 st | 317,514.659 g |
| 100 st | 635,029.318 g |
Reverse conversion: Gram to Stone
1 g × 0.0001574730444 = 0.000157473 st
1 gram = 0.000157473 stones.
stones = grams × 0.000157473044418
For a page dedicated to this direction, see Gram to Stone.
Stone vs. Gram
| Aspect | Stone | Gram |
|---|---|---|
| Family | UK customary unit | SI derived (metric prefix) unit |
| Typical use | Body weight reporting in the UK and Ireland (e.g. '12 stone 5 pounds') | Cooking and nutrition labeling worldwide (including in the US, alongside ounces) |
| Where it's used | United Kingdom and Ireland (body weight) | Standard small-mass unit worldwide |
Understanding the Stone
Stone (st) measures mass. A stone is 14 pounds: exactly 6.35029318 kilograms. It is classified as a UK customary unit.
Where it's used: United Kingdom and Ireland (body weight)
Uses of the Stone today
- Body weight reporting in the UK and Ireland (e.g. '12 stone 5 pounds')
- Historical wool and agricultural produce weighing
History of the Stone
The stone dates to medieval England as a general-purpose weight unit, historically varying by region and commodity (a 'stone' of wool differed from a 'stone' of meat) before settling on 14 pounds for general use. It remains in everyday use for body weight in the UK and Ireland, unlike most other English customary units which have been replaced or supplemented by metric measures.
Historical origin. Stone was not the invention of a single named person; it developed through the process described above.
Understanding the Gram
Gram (g) measures mass. A gram is one-thousandth of a kilogram, the SI base unit of mass. It is classified as a SI derived (metric prefix) unit.
Where it's used: Standard small-mass unit worldwide
Uses of the Gram today
- Cooking and nutrition labeling worldwide (including in the US, alongside ounces)
- Precious metal and small-item weighing
- Scientific and laboratory measurement
History of the Gram
Originally defined in 1795 as the mass of one cubic centimeter of water, the gram follows directly from the kilogram (1/1000 of it) under the modern SI system, inheriting the kilogram's various historical and current definitions.
Historical origin. Gram was not the invention of a single named person; it developed through the process described above.
Stone — sources
- UK Weights and Measures Act 1985 — Confirms the stone (14 lb) as a legally recognized UK unit for body weight.
Gram — sources
- BIPM — The kilogram (SI base unit) — Basis for the gram as 1/1000 of the kilogram.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many grams are in 1 stone?
1 stone equals 6,350.29318 grams, using the exact defined conversion factor rather than an estimate.
How do I convert stone to gram?
Multiply the stone value by 6350.29318. The converter above does this instantly to whatever precision you set.
How do I convert gram back to stone?
Use the reverse factor: 1 gram equals 0.000157473 stones. You can also use the swap control in the converter above to flip the direction instantly.
What is a stone?
Stone (st) measures mass. A stone is 14 pounds: exactly 6.35029318 kilograms. It is classified as a UK customary unit.
What is a gram?
Gram (g) measures mass. A gram is one-thousandth of a kilogram, the SI base unit of mass. It is classified as a SI derived (metric prefix) unit.
Is the stone to gram conversion exact?
Yes. A stone is 14 pounds: exactly 6.35029318 kilograms. That fixed definition is what the converter above uses, so any rounding you see is a display choice, not a limitation of the math.
Where is the stone still used today?
United Kingdom and Ireland (body weight)