kg to stones formula
To convert kilograms to stone, multiply the number of kilograms by 0.157473044418. In symbols: st = kg × 0.157473044418.
One kilogram equals 0.157473044418 stone, and one stone equals 6.35029318 kilograms. Since one stone is exactly 14 pounds and a pound is exactly 0.45359237 kg, one kilogram is 0.157473044 stone exactly.
Worked example
Suppose you have 80 kilograms and need the answer in stone.
- Write the formula: st = kg × 0.157473044418.
- Put in the number: 80 × 0.157473044418 = 12.59784355.
- Round to suit the job. 12.6 st is accurate enough for most everyday uses.
So 80 kg is 12.59784355 st. To check, convert back: 12.59784355 st is 80 kg.
Common kilograms to stone values
| kilograms (kg) | stone (st) |
|---|---|
| 1 | 0.1574730444 |
| 2 | 0.3149460888 |
| 5 | 0.7873652221 |
| 10 | 1.574730444 |
| 20 | 3.149460888 |
| 50 | 7.873652221 |
| 100 | 15.74730444 |
Reference points
Some familiar amounts in kilograms, converted to stone:
- 50 kg, a light adult: 7.87365 st
- 70 kg, an average adult: 11.0231 st
- 80 kg, a heavier adult: 12.5978 st
- 100 kg, a large adult: 15.7473 st
Where you will use it
UK and Irish weight scales and weight-loss clubs report body weight in stones and pounds. A kilogram figure from a clinic or app needs this conversion to make sense.
Quick mental math
Divide kilograms by 6.35. For stones and pounds, take the leftover decimal times 14. Rule of thumb: multiply by 0.157. For 80 kg this gives 12.56 st against the exact 12.6, an error of 0.3 percent.
Going the other way
Need the reverse? Use the stones to kg converter. For comparison, 1 st is 6.3502932 kg. To compare every weight unit at once, open the weight converter.
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