Stone (st) Weight Unit Conversions - Inch Calculator

What Is a Stone?

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Joe is the creator of Inch Calculator and has over 20 years of experience in engineering and construction. He holds several degrees and certifications.

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Sexton, J. (n.d.). Stone Conversion Calculator. Inch Calculator. Retrieved February 28, 2026, from https://www.inchcalculator.com/convert/from-stone/

A stone is a unit used to measure weight.

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

How Much 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]

How to Convert Stones

To convert stones to another unit of weight, you need to multiply the value by a conversion factor. A conversion factor is a numerical value used to change the units of a measurement without changing the value.[2]

You can find the conversion factors for stones in the conversion table below.

Then, multiply the weight measurement by the conversion factor to find the equivalent value in the desired unit of measurement.

stones × conversion factor = result

You can also use a calculator, such as one of the converters above, for the conversion.

Stone Conversion Table

Common stone values and equivalent imperial and metric weight measurements

stones	pounds	kilograms	calories
1 st	14 lb	6.350293 kg	49,000 kcal
2 st	28 lb	12.700586 kg	98,000 kcal
3 st	42 lb	19.05088 kg	147,000 kcal
4 st	56 lb	25.401173 kg	196,000 kcal
5 st	70 lb	31.751466 kg	245,000 kcal
6 st	84 lb	38.101759 kg	294,000 kcal
7 st	98 lb	44.452052 kg	343,000 kcal
8 st	112 lb	50.802345 kg	392,000 kcal
9 st	126 lb	57.152639 kg	441,000 kcal
10 st	140 lb	63.502932 kg	490,000 kcal
11 st	154 lb	69.853225 kg	539,000 kcal
12 st	168 lb	76.203518 kg	588,000 kcal
13 st	182 lb	82.553811 kg	637,000 kcal
14 st	196 lb	88.904105 kg	686,000 kcal
15 st	210 lb	95.254398 kg	735,000 kcal
16 st	224 lb	101.604691 kg	784,000 kcal
17 st	238 lb	107.954984 kg	833,000 kcal
18 st	252 lb	114.305277 kg	882,000 kcal
19 st	266 lb	120.65557 kg	931,000 kcal
20 st	280 lb	127.005864 kg	980,000 kcal

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. National Institute of Standards & Technology, Unit Conversion, https://www.nist.gov/pml/owm/metric-si/unit-conversion

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