ConvBolt — Unit ConverterStone to Kilograms Converter
Converting stone to kilograms is a multiplication by a fixed factor: 1 st = 6.350293 kg. The table below covers the values people look up most often, and the formula section shows exactly where that factor comes from.
Because one stone works out to 6.350293 kg, the kilogram is the larger unit of the two: a figure given in kilogram always carries a larger number than the same measurement in stone. A chart drawn in st can hide that, so check which label the axis uses before you compare two readings.
Where a legal or postal limit is set in kilograms, the same limit expressed in stone has to be exact — an overshoot of even one unit can change the chargeable band.
The conversion factor used here is 6.350293 kg per stone (6 significant digits as shown). Kept to seven figures it covers professional measurement; if you round it to two or three decimals for a spreadsheet, the error scales with the input — at a value of 1,000 st a factor rounded to three decimals can be off by a measurable amount. The reverse direction uses 0.157473 st per kg, the exact reciprocal, so a round trip through both pages returns your original number.
Stone to Kilograms formula
Use this formula to convert any stone value to kilograms:
Worked example: 100 st × 6.350293 = 635.0293 kg.
Stone to Kilograms conversion table
| Stone (st) | Kilograms (kg) |
|---|---|
| 0.5 st | 3.175147 kg |
| 1 st | 6.350293 kg |
| 2 st | 12.70059 kg |
| 5 st | 31.75147 kg |
| 10 st | 63.50293 kg |
| 20 st | 127.0059 kg |
| 50 st | 317.5147 kg |
| 100 st | 635.0293 kg |
| 500 st | 3175.147 kg |
| 1000 st | 6350.293 kg |
How to convert stone to kilograms
Multiply the stone value by 6.350293 to get the equivalent in kilograms. This single factor works for every value in the table above and for anything else you need — there is no per-value adjustment, which is why a conversion table and a calculator always agree.
If you need the opposite direction, use the Kilograms to Stone converter instead of dividing by hand; both pages use the same source factors. For every other st conversion in one place, see the st conversion hub.
Frequently asked questions
How many kilograms are in 1 stone?
1 stone = 6.350293 kg.
What is 100 stone in kilograms?
100 st = 635.0293 kg.
Is converting stone to kilograms the same as kilograms to stone?
No — the direction changes the multiplier. The reverse conversion (1 kg = 0.157473 st) is on the Kilograms to Stone page.
Related conversions
Try the ConvBolt Unit Converter for any other weight unit, browse the Weight conversions, or read our conversion guides.