Stones and lbs to kg Converter

Q: How many kilograms are in a stone?

There are 6.35029318 kg in one stone. In turn, one stone is equal to 14 pounds (avoirdupois). This is the exact conversion factor defined by international agreement.

Q: How do I convert stones and pounds to kg?

To convert: (1) multiply stones by 6.35029318 to get kg from stones, (2) multiply pounds by 0.45359237 to get kg from pounds, (3) add both results together. Example: 10 st 5 lb = (10 × 6.35029318) + (5 × 0.45359237) = 63.50 + 2.27 = 65.77 kg.

Q: How many pounds in a stone?

There are exactly 14 pounds in one stone. This is a fixed conversion used in the UK imperial measurement system.

kg→st+lb st+lb→kg st→kg lb→kg

Convert English or US weight units to metric units. Stones (st) and pounds (lb) to kilograms (kg).

You can use this web site if you get confused about the units of weight (stones and pounds). This converter can also be used when scales only display in stones (st) and you want to know how many kilograms (or kilos) you are.

This converter handles combined stones and pounds (e.g., 11 st 6 lb → kg). For simple stone-only conversion, see our stone to kg converter.

Weight conversion chart

Pounds	Unit	Stone	kg
1	1 pound	¹⁄₁₄	0.4536
14	1 stone	1	6.350
28	1 quarter	2	12.70
112	1 hundredweight	8	50.80
2240	1 (long) ton	160	1016

Stones and Pounds to kg Chart

Conversion values from stones and pounds to kilograms (4-9 st)
Stones	Pounds	Kilograms
4 stones	0 pounds	25.40kg
4 stones	1 pounds	25.85kg
4 stones	2 pounds	26.31kg
4 stones	3 pounds	26.76kg
4 stones	4 pounds	27.22kg
4 stones	5 pounds	27.67kg
4 stones	6 pounds	28.12kg
4 stones	7 pounds	28.58kg
4 stones	8 pounds	29.03kg
4 stones	9 pounds	29.48kg
4 stones	10 pounds	29.94kg
4 stones	11 pounds	30.39kg
4 stones	12 pounds	30.84kg
4 stones	13 pounds	31.30kg
5 stones	0 pounds	31.75kg
5 stones	1 pounds	32.21kg
5 stones	2 pounds	32.66kg
5 stones	3 pounds	33.11kg
5 stones	4 pounds	33.57kg
5 stones	5 pounds	34.02kg
5 stones	6 pounds	34.47kg
5 stones	7 pounds	34.93kg
5 stones	8 pounds	35.38kg
5 stones	9 pounds	35.83kg
5 stones	10 pounds	36.29kg
5 stones	11 pounds	36.74kg
5 stones	12 pounds	37.19kg
5 stones	13 pounds	37.65kg
6 stones	0 pounds	38.10kg
6 stones	1 pounds	38.56kg
6 stones	2 pounds	39.01kg
6 stones	3 pounds	39.46kg
6 stones	4 pounds	39.92kg
6 stones	5 pounds	40.37kg
6 stones	6 pounds	40.82kg
6 stones	7 pounds	41.28kg
6 stones	8 pounds	41.73kg
6 stones	9 pounds	42.18kg
6 stones	10 pounds	42.64kg
6 stones	11 pounds	43.09kg
6 stones	12 pounds	43.54kg
6 stones	13 pounds	44.00kg
7 stones	0 pounds	44.45kg
7 stones	1 pounds	44.91kg
7 stones	2 pounds	45.36kg
7 stones	3 pounds	45.81kg
7 stones	4 pounds	46.27kg
7 stones	5 pounds	46.72kg
7 stones	6 pounds	47.17kg
7 stones	7 pounds	47.63kg
7 stones	8 pounds	48.08kg
7 stones	9 pounds	48.53kg
7 stones	10 pounds	48.99kg
7 stones	11 pounds	49.44kg
7 stones	12 pounds	49.90kg
7 stones	13 pounds	50.35kg
8 stones	0 pounds	50.80kg
8 stones	1 pounds	51.26kg
8 stones	2 pounds	51.71kg
8 stones	3 pounds	52.16kg
8 stones	4 pounds	52.62kg
8 stones	5 pounds	53.07kg
8 stones	6 pounds	53.52kg
8 stones	7 pounds	53.98kg
8 stones	8 pounds	54.43kg
8 stones	9 pounds	54.88kg
8 stones	10 pounds	55.34kg
8 stones	11 pounds	55.79kg
8 stones	12 pounds	56.25kg
8 stones	13 pounds	56.70kg
9 stones	0 pounds	57.15kg
9 stones	1 pounds	57.61kg
9 stones	2 pounds	58.06kg
9 stones	3 pounds	58.51kg
9 stones	4 pounds	58.97kg
9 stones	5 pounds	59.42kg
9 stones	6 pounds	59.87kg

Conversion values from stones and pounds to kilograms (9-14 st)
Stones	Pounds	Kilograms
9 stones	7 pounds	60.33kg
9 stones	8 pounds	60.78kg
9 stones	9 pounds	61.23kg
9 stones	10 pounds	61.69kg
9 stones	11 pounds	62.14kg
9 stones	12 pounds	62.60kg
9 stones	13 pounds	63.05kg
10 stones	0 pounds	63.50kg
10 stones	1 pounds	63.96kg
10 stones	2 pounds	64.41kg
10 stones	3 pounds	64.86kg
10 stones	4 pounds	65.32kg
10 stones	5 pounds	65.77kg
10 stones	6 pounds	66.22kg
10 stones	7 pounds	66.68kg
10 stones	8 pounds	67.13kg
10 stones	9 pounds	67.59kg
10 stones	10 pounds	68.04kg
10 stones	11 pounds	68.49kg
10 stones	12 pounds	68.95kg
10 stones	13 pounds	69.40kg
11 stones	0 pounds	69.85kg
11 stones	1 pounds	70.31kg
11 stones	2 pounds	70.76kg
11 stones	3 pounds	71.21kg
11 stones	4 pounds	71.67kg
11 stones	5 pounds	72.12kg
11 stones	6 pounds	72.57kg
11 stones	7 pounds	73.03kg
11 stones	8 pounds	73.48kg
11 stones	9 pounds	73.94kg
11 stones	10 pounds	74.39kg
11 stones	11 pounds	74.84kg
11 stones	12 pounds	75.30kg
11 stones	13 pounds	75.75kg
12 stones	0 pounds	76.20kg
12 stones	1 pounds	76.66kg
12 stones	2 pounds	77.11kg
12 stones	3 pounds	77.56kg
12 stones	4 pounds	78.02kg
12 stones	5 pounds	78.47kg
12 stones	6 pounds	78.93kg
12 stones	7 pounds	79.38kg
12 stones	8 pounds	79.83kg
12 stones	9 pounds	80.29kg
12 stones	10 pounds	80.74kg
12 stones	11 pounds	81.19kg
12 stones	12 pounds	81.65kg
12 stones	13 pounds	82.10kg
13 stones	0 pounds	82.55kg
13 stones	1 pounds	83.01kg
13 stones	2 pounds	83.46kg
13 stones	3 pounds	83.91kg
13 stones	4 pounds	84.37kg
13 stones	5 pounds	84.82kg
13 stones	6 pounds	85.28kg
13 stones	7 pounds	85.73kg
13 stones	8 pounds	86.18kg
13 stones	9 pounds	86.64kg
13 stones	10 pounds	87.09kg
13 stones	11 pounds	87.54kg
13 stones	12 pounds	88.00kg
13 stones	13 pounds	88.45kg
14 stones	0 pounds	88.90kg
14 stones	1 pounds	89.36kg
14 stones	2 pounds	89.81kg
14 stones	3 pounds	90.26kg
14 stones	4 pounds	90.72kg
14 stones	5 pounds	91.17kg
14 stones	6 pounds	91.63kg
14 stones	7 pounds	92.08kg
14 stones	8 pounds	92.53kg
14 stones	9 pounds	92.99kg
14 stones	10 pounds	93.44kg
14 stones	11 pounds	93.89kg
14 stones	12 pounds	94.35kg
14 stones	13 pounds	94.80kg

Frequently Asked Questions

How many kilograms are in a stone?

There are 6.35029318 kg in one stone.

In turn, one stone is equal to 14 pounds (avoirdupois). This is the exact conversion factor defined by international agreement.

Quick reference:

1 stone = 6.35029318 kg exact
1 stone ≈ 6.35 kg (rounded)
1 stone = 14 pounds exact

How to convert stone to kilograms

As there are 6.35029318 kilograms in a stone, to convert stone to kilograms you simply multiply your stone figure by 6.35029318.

Formula: kg = stones × 6.35029318

Examples:

10 stones × 6.35029318 = 63.50 kg
12 stones × 6.35029318 = 76.20 kg
14 stones × 6.35029318 = 88.90 kg

How to convert kilograms to stone

One stone is equal to 6.35029318 kg. To convert kilograms to stone, divide your kg figure by 6.35029318.

Formula: stones = kg ÷ 6.35029318

Examples:

70 kg ÷ 6.35029318 = 11.02 stones
80 kg ÷ 6.35029318 = 12.60 stones
90 kg ÷ 6.35029318 = 14.17 stones

How do I convert stones and pounds to kg?

To convert stones and pounds to kilograms:

Convert stones to kg: multiply stones by 6.35029318
Convert pounds to kg: multiply pounds by 0.45359237
Add both results together

Example: 10 st 5 lb to kg

Step 1: 10 × 6.35029318 = 63.50 kg
Step 2: 5 × 0.45359237 = 2.27 kg
Step 3: 63.50 + 2.27 = 65.77 kg

How many pounds in a stone?

There are exactly 14 pounds in one stone.

This is a fixed conversion used in the UK imperial measurement system. It has been standardized since the UK Weights and Measures Act 1963.

In metric terms: 14 pounds = 6.35029318 kilograms = 1 stone

Most Popular Stones to Kg Conversions

These are the most commonly searched stone-to-kilogram conversions, based on typical UK body weights:

Common Body Weights (UK)

10 stones to kg = 63.50 kg (average female)
11 stones to kg = 69.85 kg
12 stones to kg = 76.20 kg
13 stones to kg = 82.55 kg (average male)
14 stones to kg = 88.90 kg
15 stones to kg = 95.25 kg

Common Stones and Pounds Combinations

Lighter Weights

8 stones to kg = 50.80 kg (petite build)
9 stones to kg = 57.15 kg

Tip: Click any conversion above to see the detailed calculation and step-by-step process for that specific weight.

Stones and Pounds to Kilograms Converter

Convert stones and pounds (st + lb) to kilograms (kg) with our easy-to-use calculator

Sample Stones and Pounds to Kg Conversions

Quick access to frequently searched conversions: