Stones to Grams
An instant stones-to-grams converter, with the formula and a reference table below.
| Stones | Grams |
|---|---|
| 1 st | 6350.29318 g |
| 2 st | 12700.58636 g |
| 3 st | 19050.87954 g |
| 5 st | 31751.4659 g |
| 10 st | 63502.9318 g |
| 25 st | 158757.3295 g |
| 50 st | 317514.659 g |
| 100 st | 635029.318 g |
How to use
- Enter a value in the Stones field.
- The Grams figure appears immediately — no button to press.
- Typing in the Grams field converts back to Stones the same way.
- Use the reference table for the values that come up most often.
Stones to Grams formula
To convert stones to grams, multiply by 6350.29318.
g = st × 6350.29318
Why this factor: the stone and the gram are both defined against the kilogram, so dividing one definition by the other gives 6350.29318 directly. Both definitions are set out in full below.
To go the other way, divide by 6350.29318 — or use the Grams to Stones converter, which is the same calculation reversed.
Worked example
Given 2 st, multiplying by 6350.29318 yields 12700.58636 g.
2 st × 6350.29318 = 12700.58636 g
The converter above does this for any value you type, in either direction.
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.
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.
Stones vs Grams
The stone is an imperial unit while the gram is a metric 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 grams are in a stone?
One stone equals 6350.29318 grams.
What is the formula to convert stones to grams?
Multiply the number of stones by 6350.29318. To reverse it, divide by 6350.29318 instead.
How do I convert grams back to stones?
Divide by 6350.29318, which is the same as multiplying by 0.000157473044.
How many grams are in 10 stones?
10 st works out to 63502.9318 g.
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 stone defined?
Fourteen avoirdupois pounds, so exactly 6.35029318 kilograms.