Stone to KG Converter
Convert a weight in stones and pounds to kilograms. Enter it the way UK and Irish scales show it — for example 11 st 4 lb — and get kilograms instantly.
0–13; larger values are added on.
69.85 kg
Kilograms
11 st
Decimal stone
154 lb
Total pounds
Formula: kg = (stone × 14 + pounds) × 0.45359237. One stone is exactly 14 lb, or 6.35029318 kg.
Stone to kg chart
| Stone | Kilograms |
|---|---|
| 7 st | 44.45 kg |
| 8 st | 50.8 kg |
| 9 st | 57.15 kg |
| 10 st | 63.5 kg |
| 11 st | 69.85 kg |
| 12 st | 76.2 kg |
| 13 st | 82.55 kg |
| 14 st | 88.9 kg |
| 15 st | 95.25 kg |
| 16 st | 101.6 kg |
| 18 st | 114.31 kg |
| 20 st | 127.01 kg |
Need the other direction? Convert kg to stone, or convert pounds to kg.
Everything you enter is processed in your browser and isn't sent to our servers.
How to use stone to kg converter
- 1Enter the stones.
- 2Enter the remaining pounds (0–13), or leave it at 0.
- 3Read the weight in kilograms, plus decimal stone and total pounds.
- 4Check the chart for common body weights.
About this tool
One stone is exactly 14 pounds, and one pound is exactly 0.45359237 kg, so 1 stone = 6.35029318 kg. The formula is kg = (stone × 14 + pounds) × 0.45359237. 11 st 4 lb is 158 lb, or 71.67 kg.
Stones and pounds are still the usual way to state body weight in the UK and Ireland, while doctors, gyms and most of the world use kilograms. Converting is handy for medical forms, fitness apps and BMI calculators.
Enter pounds as a separate number rather than as a decimal of a stone — 11.5 stone is 11 st 7 lb, not 11 st 5 lb. The calculator also shows decimal stone to make that clear.
Frequently asked questions
1 stone is 6.35 kg (exactly 6.35029318 kg).