Ounces to Stones Converter
Enter the weight in ounces below to convert it to stones.
Convert Ounces to Stones
Enter a value in ounces (oz) to convert to stones (st).
Ounce to Stone Conversion Table
Table showing various ounce measurements converted to stones. Click any preset value or arrow to load it into the converter.
| Ounces (oz) | Stones (st) |
|---|---|
| 1 oz | 0.0044643 st |
| 2 oz | 0.0089286 st |
| 2.5 oz | 0.0111607 st |
| 5 oz | 0.0223214 st |
| 10 oz | 0.0446429 st |
| 15 oz | 0.0669643 st |
| 20 oz | 0.0892857 st |
| 25 oz | 0.1116071 st |
| 30 oz | 0.1339286 st |
| 50 oz | 0.2232143 st |
How to Convert Ounces to Stones
To convert ounces to stones, multiply the weight by the following conversion ratio: 0.0044643 stones/ounce.
Since one ounce is equal to 0.0044643 stones, you can use this simple formula to convert:
The weight in stones is equal to the weight in ounces multiplied by 0.0044643.
For example, here's how to convert 5 ounces to stones using the formula above.
How Many Stones Are in an Ounce?
There are 0.0044643 stones in an ounce, which is why we use this value in the formula above.
Our ounce to stone calculator automatically converts your weight measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Ounces and stones are both units used to measure weight. Keep reading to learn more about each unit.
What Is an Ounce?
An ounce is a unit of weight equal to 0.0283495 kilograms (kg), the base unit for weight. Equal to 1/16 of a pound (approx. 28.3495 grams). [1]
The ounce is classified as a US customary and imperial unit of weight. Ounces can be abbreviated as oz; for example, 1 ounce can be written as 1 oz.
When working with ounces (oz) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, ounces (oz) are widely used across standard weight applications within US customary and imperial workflows, engineering documentation, and technical data sheets.
What Is a Stone?
A stone is a unit of weight equal to 6.3502932 kilograms (kg), the base unit for weight. British imperial unit equal to 14 pounds (6.35029 kg). [2]
The stone is classified as a US customary and imperial unit of weight. Stones can be abbreviated as st; for example, 1 stone can be written as 1 st.
When working with stones (st) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, stones (st) are widely used across standard weight applications within US customary and imperial workflows, engineering documentation, and technical data sheets.
When converting weight between ounces (oz) and stones (st), keep full floating-point precision (1 oz = 0.0044643 st; 1 st = 224 oz) during intermediate calculations and round only the final stone figure to match your instrument tolerance.
More Ounce & Stone Conversions
Need to calculate in the opposite direction? Use our stones to ounces calculator to switch your starting unit immediately. You can also explore related tools such as converting stones to ounces, converting pounds to stones, or converting kilograms to stones.
Convert from Ounces
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Frequently Asked Questions
References
- [1]NIST OWM StandardNIST OWM (SI Units — Mass)·Mass & Weight Metrology Standard — Ounces (oz) to Stones (st)
- [2]NIST HB 44 SpecificationNIST HB 44 (NIST Handbook 44 (Current Ed.))·Unit Specifications: Ounce (oz) & Stone (UK) (st)
- [3]BIPM ReferenceBIPM (SI Base Unit: Kilogram (kg))·Conversion Factors & Mathematical Basis (oz to st)