Convert stones to pounds and kilograms instantly. 1 stone = 14 pounds. Free converter for body weight with UK, US, and metric results.
Convert stones to pounds and kilograms with this simple tool. One stone equals exactly 14 pounds or approximately 6.35 kilograms. Enter a value in stones (and optional extra pounds) for instant conversion.
The stone is primarily used in the United Kingdom and Ireland for expressing body weight. While Americans use pounds and most of the world uses kilograms, the British commonly say things like "I weigh 11 stone 4." This converter bridges all three systems.
The tool accepts stones with optional extra pounds (e.g., 12 stone 7 lb) and converts to total pounds, kilograms, and grams for complete flexibility.
Understanding this metric in precise terms allows professionals to set achievable targets, measure progress objectively, and continuously refine their approach to time and task management. Tracking this metric consistently enables professionals to identify patterns in how they allocate time and effort, revealing opportunities to work more effectively and accomplish more each day.
If you encounter body weight expressed in stones (common in UK media, health services, and conversation), this tool instantly converts to the pound or kilogram value you need. Regular monitoring of this value helps individuals and teams detect productivity patterns and adjust workflows before small inefficiencies become entrenched and hard to correct.
pounds = stones × 14 + extra_pounds kilograms = total_pounds × 0.453592 1 stone = 14 lb = 6.35029 kg (exactly 6.35029318 kg)
Result: 158 lb / 71.67 kg
11 stone 4 lb = (11 × 14) + 4 = 154 + 4 = 158 pounds. In kilograms: 158 × 0.453592 = 71.668 kg.
The stone is one of the few imperial units still in common use in the UK that has no metric equivalent in everyday speech. While road signs use miles and pubs serve pints, body weight in stones is perhaps the most persistent non-metric measurement in British culture.
British health services, diet plans, and fitness magazines routinely use stones for body weight. Weight Watchers and similar programs in the UK express goals in stones. Understanding the stone-to-kg conversion is important for interpreting UK health advice.
Before standardization, a stone varied by commodity: a stone of wool weighed 24 lb in some regions, while a stone of meat was 8 lb. It was only in 1835 that the Weights and Measures Act fixed the stone at exactly 14 avoirdupois pounds for all purposes.
There are exactly 14 pounds in one stone. The stone has been defined as 14 pounds since the Weights and Measures Act of 1835. This relationship is exact with no rounding.
12 stone = 168 pounds = 76.2 kg. The calculation: 12 × 14 = 168 lb, then 168 × 0.453592 = 76.204 kg.
No, Americans use pounds for body weight. The stone is used primarily in the United Kingdom and Ireland. This can cause confusion when reading UK health articles, BMI charts, or watching British media.
Divide kg by 0.453592 to get total pounds, then divide that by 14 for stones with the remainder in pounds. Example: 80 kg = 176.4 lb = 12 stone 8.4 lb.
The stone is not an SI unit and was officially removed from trade use in the UK in 1985. However, it remains widely used informally for body weight in the UK and Ireland and appears on many UK bathroom scales.
The stone historically varied by commodity and region, ranging from 5 to 40 pounds. The 14-pound stone became the legal standard in England in 1835. The choice of 14 may relate to medieval trade practices and fits neatly as half a quarter (28 lb).