Stones & Pounds to Kilograms Converter

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

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1 st = 6.350293 kg

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How to Convert Stones to Kilograms

To convert a measurement in stones to a measurement in kilograms, multiply the weight by the following conversion ratio: 6.350293 kilograms/stone.

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 weight in stones multiplied by 6.350293.

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

How Many Kilograms Are in a Stone?

There are 6.350293 kilograms in a stone, which is why we use this value in the formula above.

1 st = 6.350293 kg

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

What Is a Stone?

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.

Learn more about stones.

What Is a Kilogram?

One kilogram is equal to 1,000 grams, 2.204623 pounds, or 1/1,000 of a metric ton.

The formal 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 equal to the mass of 1,000 cubic centimeters, or milliliters, 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 thousands, or 103. Kilograms can be abbreviated as kg; for example, 1 kilogram can be written as 1 kg.

Learn more about kilograms.

Stone to Kilogram Conversion Table

Table showing various 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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