How do I convert stones to kilograms?

Multiply the stone value by 6.35029. So x st × 6.35029 = the equivalent in kg.

What is 5 stones in kilograms?

5 stones equals 31.7515 kilograms.

What is 10 stones in kilograms?

10 stones equals 63.5029 kilograms.

What is 100 stones in kilograms?

100 stones equals 635.029 kilograms.

How do I convert back from kilograms to stones?

Multiply the kilogram value by 0.157473. For example, 1 kg = 0.157473 st.

Is the stone bigger than the kilogram?

Yes. 1 stone is larger than 1 kilogram — specifically 6.35029 times larger.

Are these conversion factors exact?

Yes. Since the 1959 international yard and pound agreement, imperial/US units are defined exactly in terms of metric units, so the factor used here (6.35029) is exact within IEEE 754 double precision.

Stones to Kilograms Converter

1 st = 6.35029 kg

1 stone equals 6.35029 kilograms. To convert stones to kilograms, multiply the stone value by 6.35029. For quick reference: 1 st = 6.35029 kg, 5 st = 31.7515 kg, 10 st = 63.5029 kg, 100 st = 635.029 kg.

From

6.35029

FormulaKilograms = Stones × 6.35029

Quick

How to convert stones to kilograms

Take your value
Start with your value in stones.
Multiply by 6.35029
Multiply the stone value by 6.35029. This is the exact conversion factor from stones to kilograms.
Read the result
The product is your value in kilograms. For example, 5 st × 6.35029 = 31.7515 kg.

Conversion formula

The exact factor from stones to kilograms is 6.35029.

Kilograms = Stones × 6.35029

Stones to Kilograms conversion table

Fifty common reference values, hand-picked for skim utility. Use the calculator above for any value not listed.

Conversion table from stones to kilograms
Stones (st)	Kilograms (kg)
0.1 st	0.63503 kg
0.25 st	1.5876 kg
0.5 st	3.1751 kg
1 st	6.3503 kg
1.5 st	9.5254 kg
2 st	12.701 kg
2.5 st	15.876 kg
3 st	19.051 kg
4 st	25.401 kg
5 st	31.751 kg
6 st	38.102 kg
7 st	44.452 kg
8 st	50.802 kg
9 st	57.153 kg
10 st	63.503 kg
12 st	76.204 kg
15 st	95.254 kg
18 st	114.31 kg
20 st	127.01 kg
25 st	158.76 kg
30 st	190.51 kg
35 st	222.26 kg
40 st	254.01 kg
45 st	285.76 kg
50 st	317.51 kg
60 st	381.02 kg
70 st	444.52 kg
75 st	476.27 kg
80 st	508.02 kg
90 st	571.53 kg
100 st	635.03 kg
120 st	762.04 kg
125 st	793.79 kg
150 st	952.54 kg
175 st	1111.3 kg
180 st	1143.1 kg
200 st	1270.1 kg
225 st	1428.8 kg
250 st	1587.6 kg
275 st	1746.3 kg
300 st	1905.1 kg
350 st	2222.6 kg
400 st	2540.1 kg
450 st	2857.6 kg
500 st	3175.1 kg
600 st	3810.2 kg
750 st	4762.7 kg
1000 st	6350.3 kg
2000 st	12701 kg
5000 st	31751 kg

Real-world reference

An average adult man in the UK weighs 12–14 st. A medium-sized dog weighs about 3 st. In kilograms, that gives you: 1 st = 6.35029 kg, 10 st = 63.5029 kg, 100 st = 635.029 kg.

Frequently asked questions

How many kilograms are in 1 stone?: 1 stone equals 6.35029 kilograms.
How do I convert stones to kilograms?: Multiply the stone value by 6.35029. So x st × 6.35029 = the equivalent in kg.
What is 5 stones in kilograms?: 5 stones equals 31.7515 kilograms.
What is 10 stones in kilograms?: 10 stones equals 63.5029 kilograms.
What is 100 stones in kilograms?: 100 stones equals 635.029 kilograms.
How do I convert back from kilograms to stones?: Multiply the kilogram value by 0.157473. For example, 1 kg = 0.157473 st.
Is the stone bigger than the kilogram?: Yes. 1 stone is larger than 1 kilogram — specifically 6.35029 times larger.
Are these conversion factors exact?: Yes. Since the 1959 international yard and pound agreement, imperial/US units are defined exactly in terms of metric units, so the factor used here (6.35029) is exact within IEEE 754 double precision.

About the stone and the kilogram

The stone

The stone (st) equals exactly 14 pounds (about 6.35 kg). It is still widely used in the United Kingdom and Ireland to state body weight, even though it is no longer legal for trade. The stone was originally a real stone used by merchants as a counterweight on balances; its weight varied by region and trade until standardized in the late 19th century.

The kilogram

The kilogram (kg) is the SI base unit of mass. Since the 2019 redefinition it is defined by fixing the Planck constant to exactly 6.62607015 × 10⁻³⁴ J·s, replacing the old International Prototype Kilogram artifact. In everyday use, the kilogram is the global standard for body weight, groceries, and engineering specifications.