1 stone = 6.3502932 kg
1 st = 6.35029 kg · type math like (12*4)+6.5
Stone to kilograms is a British and Irish conversion. People in the UK commonly give body weight in stone and pounds, while doctors, gyms and fitness apps record kilograms, so translating between them is part of everyday health and sport talk there.
Healthcare in the UK is where this matters most. Patients often know their weight in stone, while NHS records, BMI calculators and medication doses use kilograms. Someone at 14 st 7 lb weighs 92.08 kg, which is the value a nurse will record. BMI is then calculated as weight in kilograms divided by height in meters squared.
Sport also uses stone. UK boxing commentary still mentions stone, and Irish and British jockeys are weighed in stone and pounds. A jockey at 8 st 7 lb is 54 kg, close to the minimum riding weights in many flat races.
Historic UK military and police height and weight standards were also listed in stone.
BMI charts in the UK often show both stone and kg along the axis. 9 st is 57.2 kg.
A quick sense check: one stone is a little over 6 kg, so 10 stone should land around 63 kg and 15 stone around 95 kg (95.25 exactly). If your answer looks like the pound figure, you probably forgot to multiply stone by 14 first. When stone and pounds are given together, always convert both parts to pounds, add them, and only then convert to kilograms to avoid rounding errors.
kg = st × 6.35029318
Reverse: 1 kg = 0.15747304 st.
Convert 11 st 4 lb to kilograms.
Answer: 11 st 4 lb = 71.7 kg.
| st | kg |
|---|---|
| ¼ st | 1.5875733 kg |
| ½ st | 3.1751466 kg |
| ¾ st | 4.7627199 kg |
| 1 st | 6.3502932 kg |
| 2 st | 12.700586 kg |
| 3 st | 19.05088 kg |
| 4 st | 25.401173 kg |
| 5 st | 31.751466 kg |
| 6 st | 38.101759 kg |
| 7 st | 44.452052 kg |
| 8 st | 50.802345 kg |
| 9 st | 57.152639 kg |
| 10 st | 63.502932 kg |
| 11 st | 69.853225 kg |
| 12 st | 76.203518 kg |
| 13 st | 82.553811 kg |
| st | kg |
|---|---|
| 14 st | 88.904105 kg |
| 15 st | 95.254398 kg |
| 16 st | 101.60469 kg |
| 17 st | 107.95498 kg |
| 18 st | 114.30528 kg |
| 19 st | 120.65557 kg |
| 20 st | 127.00586 kg |
| 25 st | 158.75733 kg |
| 30 st | 190.5088 kg |
| 40 st | 254.01173 kg |
| 50 st | 317.51466 kg |
| 75 st | 476.27199 kg |
| 100 st | 635.02932 kg |
| 250 st | 1 587.5733 kg |
| 500 st | 3 175.1466 kg |
| 1 000 st | 6 350.2932 kg |
About 13 st 2 lb, which is 184 lb or 83.5 kg.
A Grand National top weight of 11 st 12 lb is 166 lb, or 75.3 kg including saddle.
Losing one stone means losing 6.35 kg.
There are 14 lb in a stone, not 10. 11 st 4 lb is 11.29 stone, so it is 71.7 kg, not 72.4 kg.
Americans, Australians and Canadians rarely understand stone. Give pounds or kilograms instead.
Historic records may use an 8 lb stone for meat or a 16 lb stone in some trades. Check the context.
One stone equals 14 pounds, which is exactly 6.35029318 kg.
Origin. Traders once weighed goods against actual stones, and the value varied by commodity and town; a stone of wool was not a stone of cheese. The 14-pound stone was standardised by the Weights and Measures Act of 1835.
Used today. Today stone is used almost only in the UK and Ireland, mainly for body weight and horse racing jockey weights. It is no longer a legal trade unit.
The SI base unit of mass, about 0.157 stone.
Origin. Introduced in France in 1795 and redefined via the Planck constant in 2019.
Used today. NHS records, gym equipment and food labels in the UK all use kilograms.
63.5 kg.
The 14 lb stone came from the medieval wool trade and was made standard for most goods by the 1835 Weights and Measures Act.
No. Stone has never been in common use in the US, where body weight is given in pounds.
168 lb, which is 76.2 kg.
No. It was removed from legal trade use in 1985, though it remains common in conversation and on bathroom scales.