Unit converter
Kilograms to stone.
Convert kg to st and st to kg. Type in either box and the other follows. This gives stone as a decimal. UK weights are normally said as stone and pounds, so multiply what is after the point by 14 to get the pounds.
| kg | st |
|---|---|
| 40 kg | 6.29892 st |
| 45 kg | 7.08629 st |
| 50 kg | 7.87365 st |
| 55 kg | 8.66102 st |
| 60 kg | 9.44838 st |
| 65 kg | 10.2357 st |
| 70 kg | 11.0231 st |
| 75 kg | 11.8105 st |
| 80 kg | 12.5978 st |
| 85 kg | 13.3852 st |
| 90 kg | 14.1726 st |
| 95 kg | 14.9599 st |
| 100 kg | 15.7473 st |
| 110 kg | 17.322 st |
| 120 kg | 18.8968 st |
- Conversion goes through kg in both directions, so neither figure is rounded on the way.
Definitions
- The kilogram is the SI base unit of mass, defined since 2019 by fixing the Planck constant rather than by a metal cylinder in Paris.
- The stone is 14 pounds, exactly 6.350 293 18 kg. UK body weight is normally quoted as stone and pounds — 12 st 4 lb, not 12.29 st.
- This conversion is exact by definition. 1 kg = 0.1574730444 st.
- Everything here is mass, not force. The pound is defined as exactly 0.453 592 37 kg, so pound-to-kilogram conversion is exact.
How it works
One direction multiplies and the other divides by the same number, so nothing is lost by going back and forth.
The value passes through kg, the unit every other mass & weight unit on the site is defined against, rather than a number written into this page on its own. That is why the figure here, the figure in the table above and the general mass & weight converter always agree.
Display precision limits significant figures rather than decimal places, because one fixed number of decimals is useless across a range this wide. Very large and very small results switch to scientific notation with a proper superscript exponent. The editable box always holds a plain number at full working precision, so you can carry on from either side.
Common questions this answers: how many stone in a kilogram (0.157473), how many kilograms in a stone (6.35029), and what 70 kg is in stone (11.0231 st).
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