KG to Stone formula
1 kilogram = 0.1574730444 stone, and 1 stone = 6.35029318 kilograms. The SI base unit of mass.
KG to Stone chart
| Kilograms (kg) | Stone (st) |
|---|---|
| 40 | 6.2989 |
| 45 | 7.0863 |
| 50 | 7.8737 |
| 55 | 8.661 |
| 60 | 9.4484 |
| 65 | 10.2357 |
| 70 | 11.0231 |
| 75 | 11.8105 |
| 80 | 12.5978 |
| 85 | 13.3852 |
| 90 | 14.1726 |
| 95 | 14.9599 |
| 100 | 15.7473 |
| 105 | 16.5347 |
| 110 | 17.322 |
| 115 | 18.1094 |
| 120 | 18.8968 |
| 130 | 20.4715 |
| 140 | 22.0462 |
| 150 | 23.621 |
Values are rounded to 4 decimal places. The converter above shows more precision.
Worked examples
A man who weighs 80 kg
80 kg ÷ 6.35029318 = 12.5978 st
80 kilograms = 12.5978 stone. That is 12 whole stone plus 0.598 × 14 = 8.37 pounds, so you would say 12 stone 8.
A gym scale reading of 65 kg
65 kg ÷ 6.35029318 = 10.2357 st
65 kilograms = 10.2357 stone. Take 10 stone, then 0.236 × 14 = 3.3 pounds. In everyday UK terms that is 10 stone 3.
Converting kilograms to stone in real life
Stone is still the everyday unit for body weight in the UK and Ireland. People say “11 stone 4”, meaning 11 stone and 4 pounds, while gyms, hospitals and weighing scales sold in Europe often show kilograms.
The converter returns decimal stone, which nobody says out loud. To split it:
- Take the whole number as the stone. For 80 kg that gives 12.598 st, so 12 stone.
- Multiply the decimal part by 14 to get pounds: 0.598 × 14 = 8.37, so about 8 pounds.
So 80 kg is 12 st 8 lb. Do not read 12.598 st as “12 stone 6”; the decimal is a fraction of 14 pounds, not of 10. To see what your weight means for your health, try the BMI calculator.