Kilograms to Stones Converter
Convert kilograms (kg) to stones (st) and pounds (lb) with precision
Quick Conversions
Conversion Formula and Method
The stone is a traditional British unit of weight measurement still widely used in the United Kingdom and Ireland, particularly for expressing body weight. The conversion between kilograms and stones is based on a fixed ratio.
Alternatively: Stones = Kilograms ÷ 6.35029318
Conversion Steps
- Take your weight in kilograms
- Multiply the kilogram value by 0.157473 to get the total in stones
- The whole number represents full stones
- Multiply the decimal portion by 14 to convert it to pounds
- Express the result as stones and pounds (e.g., 11 stone 7 pounds)
For example, if you weigh 70 kg: 70 × 0.157473 = 11.023 stones. The whole number is 11 stones. The decimal 0.023 × 14 = 0.32 pounds, giving you approximately 11 stone 0 pounds.
Conversion Reference Table
This table provides common kilogram to stone conversions for quick reference, particularly useful for body weight measurements.
| Kilograms (kg) | Stones (st) | Stones and Pounds | Pounds (lb) |
|---|---|---|---|
| 50 kg | 7.87 st | 7 st 12 lb | 110.23 lb |
| 55 kg | 8.66 st | 8 st 9 lb | 121.25 lb |
| 60 kg | 9.45 st | 9 st 6 lb | 132.28 lb |
| 65 kg | 10.24 st | 10 st 3 lb | 143.30 lb |
| 70 kg | 11.02 st | 11 st 0 lb | 154.32 lb |
| 75 kg | 11.81 st | 11 st 11 lb | 165.35 lb |
| 80 kg | 12.60 st | 12 st 8 lb | 176.37 lb |
| 85 kg | 13.38 st | 13 st 5 lb | 187.39 lb |
| 90 kg | 14.17 st | 14 st 2 lb | 198.42 lb |
| 95 kg | 14.96 st | 14 st 13 lb | 209.44 lb |
| 100 kg | 15.75 st | 15 st 10 lb | 220.46 lb |
Weight Comparison Examples
These visual comparisons illustrate typical body weights expressed in both kilograms and stones, helping you better grasp the relationship between the two units.
Average Adult Female
Average Adult Male
Healthy Weight Range
Fitness Milestone
Cultural Context of Stone Measurement
The stone is a uniquely British unit with historical significance that continues to influence how people in the UK perceive body weight. One stone equals exactly 14 pounds or 6.35029318 kilograms. This measurement system dates back to mediaeval times and was standardised during the reign of Edward III in the 14th century.
Whilst most of the world uses kilograms exclusively, the United Kingdom and Ireland maintain the tradition of expressing human body weight in stones and pounds. This cultural preference remains strong despite the metric system’s adoption in most other measurements. Medical professionals in the UK often work with both systems, recording weights in kilograms whilst patients typically discuss their weight in stones.
The persistence of stones in British culture reflects a broader pattern where traditional imperial measurements coexist with metric units. Road distances remain in miles, pints are used for beer and milk, yet scientific and commercial contexts predominantly use metric measurements. Body weight in stones represents one of the most enduring examples of imperial measurement retention in everyday British life.
Practical Applications
Kilograms to stones conversion serves several important practical purposes in modern British life, particularly in health and fitness contexts.
Healthcare Settings
GP surgeries and hospitals in the UK typically record patient weights in kilograms for medical records and prescription dosage calculations. However, healthcare professionals frequently convert these measurements to stones and pounds when discussing weight with patients, as this unit feels more intuitive and familiar to most British people. Weight management programmes often track progress in both systems to accommodate patient preferences.
Fitness and Sport
Gyms and fitness centres across the UK commonly display weight in both kilograms and stones. Personal trainers and nutritionists need to work fluently with both systems, as clients may set goals in stones (“I want to lose 2 stone”) whilst equipment displays kilograms. Combat sports like boxing use different weight classes, with international competitions using kilograms but British boxers often thinking of their fighting weight in stones.
International Context
British travellers and expatriates frequently need to convert between kilograms and stones when discussing weight abroad or completing medical forms in other countries. Similarly, international visitors to the UK often find themselves needing to convert their weight from kilograms to stones to better participate in conversations about health and fitness with British friends or colleagues.
Frequently Asked Questions
Why does the UK still use stones for body weight?
The stone measurement is deeply embedded in British culture and everyday language. Whilst the UK officially adopted the metric system, stones remain the preferred unit for personal body weight because people find them more relatable and meaningful for tracking weight changes. The cultural habit has proven remarkably resilient, with most British people instinctively knowing their weight in stones but not kilograms.
How accurate do I need to be when converting kg to stone?
For everyday purposes, rounding to one or two decimal places for stones is perfectly adequate. When expressing weight as stones and pounds, rounding to the nearest pound provides sufficient precision for general use. Medical contexts may require greater accuracy, particularly for medication dosing, where exact kilogram measurements are preferred.
Is there a difference between UK stones and US measurements?
The stone is not commonly used in the United States, where pounds serve as the standard unit for body weight. Americans rarely encounter stone measurements and typically express weight exclusively in pounds. A UK weight of 10 stone would be stated as 140 pounds in the US. The UK definition of a stone (14 pounds) is universally consistent.
Should I lose weight in kilograms or stones?
The unit you choose for tracking weight loss is entirely a matter of personal preference and doesn’t affect the actual results. Many people find stones more motivating because losing “1 stone” sounds more significant than “6.35 kg”, even though they represent the same amount. Healthcare providers typically monitor progress in kilograms for consistency with medical guidelines, but you can track your goals in whichever unit feels most meaningful to you.
What’s the easiest way to remember the kg to stone conversion?
A simple approximation is to remember that 1 stone equals roughly 6.4 kilograms. To convert kilograms to stones mentally, divide the kilogram value by 6.4. For example, 64 kg divided by 6.4 equals approximately 10 stones. This method provides a quick estimate that’s accurate enough for casual conversation, though the precise conversion factor is 6.35029318.
Do bathroom scales show both kg and stones?
Most bathroom scales sold in the UK offer the option to display weight in either kilograms or stones and pounds. Many digital scales allow you to switch between units with a button press, whilst some analogue scales feature dual scales showing both measurements simultaneously. When purchasing scales in the UK, check that they include stone measurement if this is your preferred unit.