Stones to Kilograms Converter

How to convert stones to kilograms

kilograms = stones × 6.35029318

1 stone is 14 pounds, exactly 6.35029318 kilograms. The kilogram is the SI base unit of mass.

The factor 6.35029318 is exact, not a rounded value. Nothing is rounded until you choose how many decimals to show.

Worked example: 12.5 st

1. Start with the value in stones: 12.5 st.
2. Multiply by 6.35029318, because 1 stone = 6.35029318 kilograms: 12.5 × 6.35029318 = 79.37866475 kg.
3. Round to the precision you need: 79.38 kg to two decimals.

Stones and kilograms side by side

Stones to kilograms chart

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Stones from 1 to 25 converted to kilograms with the exact factor, shown to five significant digits.

Stones to kilograms, part 1 of 2

st	kg
1	6.3503
1.5	9.5254
2	12.701
2.5	15.876
3	19.051
3.5	22.226
4	25.401
4.5	28.576
5	31.751
5.5	34.927
6	38.102
6.5	41.277
7	44.452
7.5	47.627
8	50.802
8.5	53.977
9	57.153
9.5	60.328
10	63.503
10.5	66.678
11	69.853
11.5	73.028
12	76.204
12.5	79.379
13	82.554

Stones to kilograms, part 2 of 2

st	kg
13.5	85.729
14	88.904
14.5	92.079
15	95.254
15.5	98.43
16	101.6
16.5	104.78
17	107.95
17.5	111.13
18	114.31
18.5	117.48
19	120.66
19.5	123.83
20	127.01
20.5	130.18
21	133.36
21.5	136.53
22	139.71
22.5	142.88
23	146.06
23.5	149.23
24	152.41
24.5	155.58
25	158.76

kilograms = stones × 6.35029318. Factors: NIST Handbook 44, BIPM SI Brochure, UK Weights and Measures Act 1985. unitcheck.net/weight/stones-to-kilograms/

Going the other way? Use the Kilograms to Stones converter.