Kilograms to Stone Converter (kg to st)
1 kg ≈ 0.157473 st. Convert kilograms to stone, or to stones and pounds the way UK scales show body weight, with kg and stone charts.
Stone (st) = Kilogram (kg) × 0.157473044418
Kilogram (kg): The kilogram is the SI base unit of mass. Since 2019 it has been defined by fixing the value of the Planck constant, replacing the platinum-iridium prototype kept near Paris.
Stone (st): A stone is 14 pounds, exactly 6.35029318 kilograms. In the UK and Ireland body weight is still commonly given in stone and pounds, such as 11 st 4 lb.
| Kilogram (kg) | Stone (st) |
|---|---|
| 1 | 0.157473044418 |
| 5 | 0.787365222089 |
| 10 | 1.57473044418 |
| 25 | 3.93682611044 |
| 50 | 7.87365222089 |
| 100 | 15.7473044418 |
Gym machines, hospital scales and most of the world's sports rules give weight in kilograms, but many people in the UK and Ireland only have a feel for their weight in stone. Dividing kilograms by 6.35029318, the exact size of one stone, gives the answer as a decimal; the chart then splits it into whole stones and leftover pounds.
That stones-and-pounds form is the one many British bathroom scales show, so 75 kg reads as 11 st 11.3 lb rather than 11.81 st. The kilogram column runs in small steps from 45 to 140 kg to cover most adult readings. To go back the other way, multiply the stones by about 6.35 and add roughly 0.45 kg for each loose pound.
How to use this tool
- Type a value in the Kilogram box to see it in stone, or type in the Stone box to convert the other way.
- Press ⇄ to swap the two units, or Load example for a typical value.
- Check the charts below for common values; for other units, open the Weight & Mass converter.
Formula
Stone (st) = Kilogram (kg) × 0.157473044418
Kilogram (kg) = Stone (st) × 6.35029318
Both factors come from exact definitions: 1 stone = 6.35029318 kilograms and 1 kilogram = 0.157473044418 stone (shown to 12 significant digits).
Example
Two conversions worked with the same factors the converter uses:
75 kg × 0.157473044418 ≈ 11.8105 st
12 st × 6.35029318 ≈ 76.2035 kg
Kilogram to Stone chart
Common values from kilograms to stone, rounded to four decimal places.
| Kilogram (kg) | Stone (st) | Stones and pounds |
|---|---|---|
| 45 | 7.0863 | 7 st 1.2 lb |
| 50 | 7.8737 | 7 st 12.2 lb |
| 52 | 8.1886 | 8 st 2.6 lb |
| 54 | 8.5035 | 8 st 7.0 lb |
| 57 | 8.976 | 8 st 13.7 lb |
| 60 | 9.4484 | 9 st 6.3 lb |
| 63 | 9.9208 | 9 st 12.9 lb |
| 65 | 10.2357 | 10 st 3.3 lb |
| 68 | 10.7082 | 10 st 9.9 lb |
| 70 | 11.0231 | 11 st 0.3 lb |
| 73 | 11.4955 | 11 st 6.9 lb |
| 75 | 11.8105 | 11 st 11.3 lb |
| 78 | 12.2829 | 12 st 4.0 lb |
| 81 | 12.7553 | 12 st 10.6 lb |
| 85 | 13.3852 | 13 st 5.4 lb |
| 88 | 13.8576 | 13 st 12.0 lb |
| 90 | 14.1726 | 14 st 2.4 lb |
| 93 | 14.645 | 14 st 9.0 lb |
| 95 | 14.9599 | 14 st 13.4 lb |
| 100 | 15.7473 | 15 st 10.5 lb |
| 105 | 16.5347 | 16 st 7.5 lb |
| 110 | 17.322 | 17 st 4.5 lb |
| 115 | 18.1094 | 18 st 1.5 lb |
| 120 | 18.8968 | 18 st 12.6 lb |
| 130 | 20.4715 | 20 st 6.6 lb |
| 140 | 22.0462 | 22 st 0.6 lb |
Stone to Kilogram chart
The reverse direction for values people often look up.
| Stone (st) | Kilogram (kg) |
|---|---|
| 5 | 31.7515 |
| 6.5 | 41.2769 |
| 7.5 | 47.6272 |
| 8.5 | 53.9775 |
| 9 | 57.1526 |
| 10 | 63.5029 |
| 11 | 69.8532 |
| 12 | 76.2035 |
| 13 | 82.5538 |
| 14 | 88.9041 |
| 16 | 101.6047 |
| 18 | 114.3053 |
| 21 | 133.3562 |
Sport weight limits set in kilograms
| Limit | Kilogram (kg) | Stone (st) |
|---|---|---|
| Judo, lightest women's weight category | 48 | 7.5587 |
| Lightweight rowing, women's maximum per rower | 59 | 9.2909 |
| Judo, lightest men's weight category | 60 | 9.4484 |
| Lightweight rowing, men's maximum per rower | 72.5 | 11.4168 |
| Judo, heaviest capped women's category | 78 | 12.2829 |
| Judo, heaviest capped men's category | 100 | 15.7473 |
Quick mental estimate
Multiply by 2.2 for pounds, then take out whole 14s: 75 kg → 165 lb → 11 st 11 lb. The 2.2 factor is about 0.2% below the exact one, so the result can come out a fraction of a pound light.
Use the converter or the charts when the exact figure matters.
The two units
Kilogram (kg): The kilogram is the SI base unit of mass. Since 2019 it has been defined by fixing the value of the Planck constant, replacing the platinum-iridium prototype kept near Paris.
Stone (st): A stone is 14 pounds, exactly 6.35029318 kilograms. In the UK and Ireland body weight is still commonly given in stone and pounds, such as 11 st 4 lb.
Frequently asked questions
What is 100 kg in stone?
100 kg is about 15.75 st, or 15 st 10.5 lb. Each further 10 kg adds about 1.57 st, roughly 1 st 8 lb.
Is stone used outside the UK and Ireland?
Rarely. The US uses pounds on their own and most other countries use kilograms, so a weight in stone usually needs converting before it is shared beyond the UK and Ireland.
What is a healthy weight in stone?
It depends on height, so there is no single figure. Body mass index compares weight with height, and a BMI from 18.5 to 24.9 is classed as a healthy weight for most adults; the BMI calculator works it out from your weight and height.
How precise is the result?
The converter uses the exact definitions above with browser floating-point arithmetic and shows up to 12 significant digits. The charts round to four decimal places for reading.
Sources
Last updated:
Page address with these inputs: https://kakao.mobile/tools/kilogram-to-stone-converter/
Cite or embed this tool
kakaoCalc. (2026, November 8). Kilograms to Stone Converter (kg to st). https://kakao.mobile/tools/kilogram-to-stone-converter/
“Kilograms to Stone Converter (kg to st).” kakaoCalc, 8 Nov. 2026, kakao.mobile/tools/kilogram-to-stone-converter/.
Paste this code into your page. The widget runs in your visitors' browsers, shows no ads and keeps a link back to this page. Embedding terms