The stone is a unit of weight primarily used in the UK, Ireland, and other Commonwealth countries for measuring body weight and some food items. Understanding the conversion between stones and pounds is helpful when traveling internationally or reading UK health information.
The Conversion Formula
One stone equals exactly 14 pounds. This relationship is fixed and consistent, making stone-to-pound conversions straightforward.
1 stone = 14 pounds
1 pound = 0.071429 stones
To convert stones to pounds, multiply by 14:
Pounds = Stones ร 14
Worked Examples
Example 1: Convert 10 stones to pounds
10 ร 14 = 140 pounds
Example 2: Convert 12.5 stones (a common weight measurement)
12.5 ร 14 = 175 pounds
Example 3: Convert 8 stones and 4 pounds to total pounds
(8 ร 14) + 4 = 112 + 4 = 116 pounds
Quick Reference Table
| Stones | Pounds | Height Category |
|---|---|---|
| 7 | 98 | Light |
| 8 | 112 | Light-medium |
| 9 | 126 | Medium |
| 10 | 140 | Medium-heavy |
| 11 | 154 | Heavy |
| 12 | 168 | Very heavy |
| 13 | 182 | Very heavy |
Converting Pounds Back to Stones
To find how many stones are in pounds, divide by 14:
Stones = Pounds รท 14
Example: 156 pounds to stones:
156 รท 14 = 11.14 stones
Or express as stones and pounds:
156 รท 14 = 11 stones and 2 pounds
Understanding Stone and Pounds Format
In the UK, weight is often expressed as stones and pounds together, like "11 stone 7" (11 stones and 7 pounds). This format is especially common when discussing body weight or personal measurements.
To convert mixed format to total pounds:
- Multiply the stones by 14
- Add any remaining pounds
Example: 9 stone 8 to pounds:
(9 ร 14) + 8 = 126 + 8 = 134 pounds
When You'll Encounter This Conversion
- Travel: UK health records and doctor visits record weight in stones
- Sports: Many UK-based weight classes in boxing and weightlifting use stones
- Food: Some UK products may list weights in stones for larger quantities
- Personal Health: Fitness and nutrition discussions in UK contexts often reference stones
Converting to Kilograms
If you need to convert stones to the metric system, remember that 1 pound equals approximately 0.453592 kilograms:
Kilograms = Stones ร 14 ร 0.453592
Kilograms = Stones ร 6.35029
Use our Weight Converter to convert between stones, pounds, kilograms, and other weight measurements.