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Stone to kg

Stone to kg Converter

Convert stone (and pounds) to kilograms and back instantly. One stone is 6.35029 kg, so the conversion is exact — perfect for putting UK body weight onto a health form.

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Stone ↔ kg

1 stone = 6.35029 kg (exact).

Converted weight
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    1 stone = 6.35029 kg; 1 pound = 0.453592 kg. Conversions use exact internationally agreed values.

    Stones, pounds and kilograms

    In the UK we usually give body weight in stones and pounds, but doctors, gyms and the rest of the world use kilograms. There are 14 pounds in a stone, and 1 stone equals 6.35029 kg exactly. So to convert, turn everything into pounds, then multiply by 0.453592 — or just multiply whole stones by 6.35029.

    💡 Quick answer

    11 stone = 69.85 kg (11 × 6.35029). With pounds, add them first: 11 st 7 lb is 161 lb × 0.453592 = 73.0 kg. To reverse, divide kg by 6.35029 for stones and read the decimal as pounds (× 14).

    Stone to kg table

    StonesKilograms
    8 st50.8 kg
    10 st63.5 kg
    11 st69.9 kg
    12 st76.2 kg
    14 st88.9 kg
    16 st101.6 kg

    Based on 1 stone = 6.35029 kg. Add 0.45 kg for each extra pound.

    Why you'll need kilograms

    Medical forms, BMI and most fitness apps want kilograms, while medication doses are often per-kg of body weight. This tool gives an exact figure from your stones-and-pounds weight. For a four-way tool covering grams and pounds too, see the weight converter; for height try the height converter.

    MB
    Reviewed by Mustafa Bilgic
    Founder, Calcu · Consumer-finance tools

    "Almost everyone in the UK knows their weight in stones but needs kilograms at the GP. We convert stones and pounds to kg exactly — 6.35029 kg per stone — so the figure you write on a form matches the clinic's scales."

    Frequently asked questions

    How do I convert stone to kg?

    Multiply whole stones by 6.35029. If you also have pounds, convert everything to pounds first (stones × 14 + pounds) and multiply by 0.453592. For example, 11 stone is 69.85 kg.

    How many kg is 11 stone?

    11 stone is about 69.85 kg, since each stone is 6.35029 kg.

    How do I convert kg to stones and pounds?

    Divide the kilograms by 6.35029 to get stones; the whole number is stones and the decimal part times 14 is the remaining pounds. For example, 70 kg is 11 st 0.2 lb.

    How many kg is 12 stone 7 pounds?

    12 st 7 lb is 175 pounds, which is about 79.4 kg (175 × 0.453592).

    Is the stone to kg conversion exact?

    Yes. It uses the defined values 1 pound = 0.45359237 kg and 1 stone = 14 pounds = 6.35029318 kg, so the result is exact, only rounded for display.