A gram is one thousandth of a kilogram.
Grams to Stones Converter — g to st
Convert Gram (g) to Stone (st) using the exact conversion factor (1 gram = 0.000157473 stone). See the formula, worked examples, conversion table, unit comparison, history, and common uses.
Grams to Stones 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 stone is 14 pounds.
Result = input x 0.001 / 6.35029318.
Mass uses the kilogram as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Grams to Stones
Weight conversions between Gram and Stone 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. Gram is typically associated with standard small-mass unit worldwide, while Stone is typically associated with united Kingdom and Ireland (body weight).
Formula
stones = grams × 0.000157473044418
This factor comes from each unit's defined relationship to the category's base unit: 1 gram equals 0.001 base units, and 1 stone equals 6.35029318 base units, so dividing one by the other gives the direct gram-to-stone factor of 0.000157473044418.
Simple example
1 g × 0.0001574730444 = 0.000157473 st
1 gram = 0.000157473 stones.
Real-world example
50 g × 0.0001574730444 = 0.0078736522 st
50 grams = 0.0078736522 stones.
Conversion table
| Gram (g) | Stone (st) |
|---|---|
| 1 g | 0.000157473 st |
| 5 g | 0.0007873652 st |
| 10 g | 0.0015747304 st |
| 25 g | 0.0039368261 st |
| 50 g | 0.0078736522 st |
| 100 g | 0.0157473044 st |
Reverse conversion: Stone to Gram
0.000157473 st × 6350.29318 = 0.9999997179 g
0.000157473 stones = 0.9999997179 grams.
grams = stones × 6350.29318
For a page dedicated to this direction, see Stone to Gram.
Gram vs. Stone
| Aspect | Gram | Stone |
|---|---|---|
| Family | SI derived (metric prefix) unit | UK customary unit |
| Typical use | Cooking and nutrition labeling worldwide (including in the US, alongside ounces) | Body weight reporting in the UK and Ireland (e.g. '12 stone 5 pounds') |
| Where it's used | Standard small-mass unit worldwide | United Kingdom and Ireland (body weight) |
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.
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.
Gram — sources
- BIPM — The kilogram (SI base unit) — Basis for the gram as 1/1000 of the kilogram.
Stone — sources
- UK Weights and Measures Act 1985 — Confirms the stone (14 lb) as a legally recognized UK unit for body weight.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many stones are in 1 gram?
1 gram equals 0.000157473 stones, using the exact defined conversion factor rather than an estimate.
How do I convert gram to stone?
Multiply the gram value by 0.0001574730444. The converter above does this instantly to whatever precision you set.
How do I convert stone back to gram?
Use the reverse factor: 1 stone equals 6,350.29318 grams. You can also use the swap control in the converter above to flip the direction instantly.
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.
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.
Is the gram to stone 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 gram still used today?
Standard small-mass unit worldwide