Stones & Pounds to Kilograms Converter

Enter the weight in stones below to get the value converted to kilograms.

Results in Kilograms:
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1 st = 6.350293 kg
Do you want to convert kilograms to stones?

How to Convert Stones to Kilograms

To convert a stone measurement to a kilogram measurement, multiply the weight by the conversion ratio.

Since one stone is equal to 6.350293 kilograms, you can use this simple formula to convert:

kilograms = stones × 6.350293

The weight in kilograms is equal to the stones multiplied by 6.350293.

For example, here's how to convert 5 stones to kilograms using the formula above.
5 st = (5 × 6.350293) = 31.751466 kg

Stones and kilograms are both units used to measure weight. Keep reading to learn more about each unit of measure.

Stones

One stone is equal to 14 pounds and is mostly used in the United Kingdom and Ireland as a unit of mass. It's most commonly used to measure personal body weight.[1]

The stone is an imperial unit of weight. Stones can be abbreviated as st; for example, 1 stone can be written as 1 st.

Kilograms

The definition of the kilogram changed in 2019. One kilogram was previously equal to the mass of the platinum-iridium bar, known as the International Prototype of the Kilogram, which was stored in Sèvres, France.

The 2019 SI brochure now defines the kilogram using the Planck constant, and it is defined using the meter and second.[2] It is roughly equal to the mass of 1,000 cubic centimeters of water.

The kilogram, or kilogramme, is the SI base unit for weight and is also a multiple of the gram. In the metric system, "kilo" is the prefix for 103. Kilograms can be abbreviated as kg; for example, 1 kilogram can be written as 1 kg.

Stone to Kilogram Conversion Table

Stone measurements converted to kilograms
Stones Kilograms
1 st 6.3503 kg
2 st 12.7 kg
3 st 19.05 kg
4 st 25.4 kg
5 st 31.75 kg
6 st 38.1 kg
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
17 st 107.95 kg
18 st 114.31 kg
19 st 120.66 kg
20 st 127.01 kg
21 st 133.36 kg
22 st 139.71 kg
23 st 146.06 kg
24 st 152.41 kg
25 st 158.76 kg
26 st 165.11 kg
27 st 171.46 kg
28 st 177.81 kg
29 st 184.16 kg
30 st 190.51 kg
31 st 196.86 kg
32 st 203.21 kg
33 st 209.56 kg
34 st 215.91 kg
35 st 222.26 kg
36 st 228.61 kg
37 st 234.96 kg
38 st 241.31 kg
39 st 247.66 kg
40 st 254.01 kg

References

  1. National Institute of Standards and Technology, Handbook 44 - 2012 - Appendix B, https://www.nist.gov/system/files/documents/2017/04/28/AppB-12-hb44-final.pdf
  2. International Bureau of Weights and Measures, The International System of Units, 9th Edition, 2019, https://www.bipm.org/documents/20126/41483022/SI-Brochure-9-EN.pdf

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