Stones to Ounces
Type a value in either box to convert between stones and ounces. The factor is 224.
| Stones | Ounces |
|---|---|
| 1 st | 224 oz |
| 2 st | 448 oz |
| 3 st | 672 oz |
| 5 st | 1120 oz |
| 10 st | 2240 oz |
| 25 st | 5600 oz |
| 50 st | 11200 oz |
| 100 st | 22400 oz |
How to use
- Enter a value in the Stones field.
- The Ounces figure appears immediately — no button to press.
- Typing in the Ounces field converts back to Stones the same way.
- Use the reference table for the values that come up most often.
Stones to Ounces formula
To convert stones to ounces, multiply by 224.
oz = st × 224
Put another way, one stone is exactly 224 ounces.
Why this factor: the stone and the ounce are both defined against the kilogram, so dividing one definition by the other gives 224 directly. Both definitions are set out in full below.
To go the other way, divide by 224 — or use the Ounces to Stones converter, which is the same calculation reversed.
Worked example
Start with 2 st. Multiply by 224 to get 448 oz.
2 st × 224 = 448 oz
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 an ounce?
An ounce is one sixteenth of a pound, used for small weights in the US.
Definition: Exactly 28.349523125 grams — one sixteenth of the international avoirdupois pound.
Where it is used: Food packaging, postal weights, and coffee and spice quantities in the US.
Worth knowing: Not the same as a fluid ounce, which measures volume. Also distinct from the troy ounce (31.103 g) used for gold and silver.
Stones vs Ounces
The stone and the ounce belong to the same family of units, so converting between them is usually a matter of shifting a decimal point or applying a small whole-number factor.
Frequently asked questions
How many ounces are in a stone?
One stone equals 224 ounces.
What is the formula to convert stones to ounces?
Multiply the number of stones by 224. To reverse it, divide by 224 instead.
How do I convert ounces back to stones?
Divide by 224, which is the same as multiplying by 0.00446428571.
How many ounces are in 10 stones?
10 st works out to 2240 oz.
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.