Grams to Stones
Type a value in either box to convert between grams and stones. The factor is 0.000157473.
| Grams | Stones |
|---|---|
| 1 g | 0.000157 st |
| 2 g | 0.000315 st |
| 3 g | 0.000472 st |
| 5 g | 0.000787 st |
| 10 g | 0.001575 st |
| 25 g | 0.003937 st |
| 50 g | 0.007874 st |
| 100 g | 0.015747 st |
How to use
- Enter a value in the Grams field.
- The Stones figure appears immediately — no button to press.
- Typing in the Stones field converts back to Grams the same way.
- Use the reference table for the values that come up most often.
Grams to Stones formula
To convert grams to stones, multiply by 0.000157473044.
st = g × 0.000157473044
Why this factor: the gram and the stone are both defined against the kilogram, so dividing one definition by the other gives 0.000157473044 directly. Both definitions are set out in full below.
To go the other way, divide by 0.000157473044 — or use the Stones to Grams converter, which is the same calculation reversed.
Worked example
Start with 150 g. Multiply by 0.000157473044 to get 0.023621 st.
150 g × 0.000157473044 = 0.023621 st
The converter above does this for any value you type, in either direction.
What is a gram?
A gram is one thousandth of a kilogram, the everyday unit for food and small-object mass.
Definition: Exactly 0.001 kilogram by SI prefix definition.
Where it is used: Nutrition labels, recipes, postal rates, and laboratory weighing.
What is a stone?
A stone is fourteen pounds, still the customary unit for body weight in Britain and Ireland.
Definition: Fourteen avoirdupois pounds, so exactly 6.35029318 kilograms.
Where it is used: Personal body weight in the UK and Ireland, where weight is usually given as stones and pounds.
Worth knowing: Effectively unused in the United States, where body weight is quoted in pounds alone.
Grams vs Stones
The gram is a metric unit while the stone is an imperial unit. That is why the factor between them is not a round number: the two systems were defined independently and only later tied together by exact agreement.
Frequently asked questions
How many stones are in a gram?
One gram equals 0.000157473044 stones.
What is the formula to convert grams to stones?
Multiply the number of grams by 0.000157473044. To reverse it, divide by 0.000157473044 instead.
How do I convert stones back to grams?
Divide by 0.000157473044, which is the same as multiplying by 6350.29318.
How many stones are in 10 grams?
10 g works out to 0.001575 st.
Is there anything to watch out for with stones?
Effectively unused in the United States, where body weight is quoted in pounds alone.
How is the gram defined?
Exactly 0.001 kilogram by SI prefix definition.