Stone Weight Calculator
Convert weight measurements between stones, pounds, and kilograms quickly and accurately.
Detailed Conversion
Stone and Pounds:
Decimal Stones:
Total Pounds:
Kilograms:
Grams:
About Our Stone Weight Calculator
Our Stone Weight Calculator is a simple yet powerful tool that allows you to convert weight measurements between stones, pounds, and kilograms. Stone (st) is a unit of weight commonly used in the United Kingdom and Ireland, making this calculator especially useful for international weight conversions.
Understanding the Stone Unit of Weight
The stone is a unit of weight equal to 14 pounds (approximately 6.35 kilograms). It's primarily used in the UK and Ireland for measuring human body weight, though it's not commonly used in other contexts or countries. When someone in the UK says they weigh "11 stone 6," they mean 11 stone and 6 pounds, or 160 pounds total (72.57 kg).
Weight Conversion Relationships
- 1 stone = 14 pounds = 6.35029318 kg
- 1 pound = 0.45359237 kg = 0.07142857 stone
- 1 kg = 2.20462262 pounds = 0.15747304 stone
How to Use the Calculator:
- Enter a value in any of the three fields (stones, pounds, or kilograms)
- The calculator will automatically convert and display the equivalent values in the other units
- For more detailed conversions, check the "Detailed Conversion" section that appears below
- Use the "Clear All" button to reset the calculator for a new conversion
Common Weight Conversion Examples:
| Stones | Pounds | Kilograms |
|---|---|---|
| 1 st | 14 lb | 6.35 kg |
| 5 st | 70 lb | 31.75 kg |
| 10 st | 140 lb | 63.50 kg |
| 11 st 6 lb | 160 lb | 72.57 kg |
| 15 st 7 lb | 217 lb | 98.43 kg |
When to Use Stone Weight Conversions:
International Communication: Converting between stones, pounds, and kilograms when discussing weight with people from different countries.
Travel Preparation: Understanding your weight in local units when traveling to or from the UK and Ireland.
Medical Records: Converting medical weight records between different measurement systems.
Fitness and Weight Loss: Tracking weight goals in your preferred unit while understanding conversions to other units.
Historical Research: Converting historical weight measurements for research or educational purposes.
Our calculator provides precise conversions using the standard definitions of these weight units, ensuring accuracy for all your conversion needs.
Frequently Asked Questions
Why is the stone unit still used in the UK?
The stone unit is part of the imperial system of measurement and has been used in Britain for centuries. Despite the UK's official adoption of the metric system, the stone remains popular for expressing human body weight due to cultural tradition and familiarity. It provides a convenient middle ground between pounds (which can result in large numbers) and kilograms.
How accurate are these weight conversions?
Our calculator uses the standard conversion rates where 1 stone = 14 pounds exactly, and 1 pound = 0.45359237 kilograms exactly. These are the internationally recognized conversion rates for these units, providing precise and accurate conversions to two decimal places.
How do I convert from stones and pounds to just pounds?
To convert from stones and pounds to just pounds, multiply the number of stones by 14 and then add the remaining pounds. For example, 11 stone 6 pounds = (11 × 14) + 6 = 160 pounds.
Does anyone outside the UK and Ireland use the stone unit?
While the stone unit is primarily associated with the UK and Ireland, it was historically used in various parts of Europe with different values (ranging from 5 to 40 local pounds). Today, it's rarely used outside the British Isles, and even within the UK, it's mainly used for human body weight rather than other weight measurements.