Kg to Stone Converter (kg to st)

Updated September 2026

Quick Answer: stone = kg ÷ 6.35029 (or kg × 0.157473). So 70 kg = 11.02 st, 80 kg = 12.60 st, and 100 kg = 15.75 st. For a mixed result, take the whole number as stone and multiply the decimal by 14 to get remaining pounds.
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Kilogram to Stone

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Contents

  1. The Conversion Formula
  2. Converting to Stone and Pounds
  3. Visual Guide
  4. Common kg Values in Stone
  5. Full Reference Table
  6. FAQs

Converting kilograms to stone is the reverse of the popular stone to kg converter. The stone is a British unit of body weight still widely used in the UK and Ireland. Knowing your weight in stone is useful when talking to UK healthcare providers, reading UK fitness guides, or understanding British body weight references in books and media.

One stone equals exactly 14 pounds or 6.35029 kilograms. Because most bathroom scales in the UK display in stone and pounds (e.g., "11 st 4 lbs"), this page also shows how to break a decimal stone answer into a mixed stone + pounds result.

The Conversion Formula

stone = kg ÷ 6.35029
or equivalently:
stone = kg × 0.157473

Both forms are mathematically identical — multiplying by 0.157473 is simply dividing by 6.35029. For mental arithmetic, a rough estimate is: divide kg by 6.35. The error is less than 0.1 lb at everyday body weights.

Converting to Stone and Pounds

Most UK scales display weight as stone and pounds rather than a decimal stone value. To convert a kg value to this mixed format:

  1. Divide kg by 6.35029 to get total stone as a decimal (e.g., 75 kg = 11.811 st)
  2. Take the whole number as the stone component (11 st)
  3. Multiply the decimal remainder by 14 to get the pounds component (0.811 × 14 = 11.4 lbs)

Worked example: 75 kg

75 ÷ 6.35029 = 11.811 stone
Whole part: 11 stone
Remainder: 0.811 × 14 = 11.4 lbs
Result: 11 st 11 lbs

Worked example: 90 kg

90 ÷ 6.35029 = 14.173 stone
Whole part: 14 stone
Remainder: 0.173 × 14 = 2.4 lbs
Result: 14 st 2 lbs

Visual Guide

Two Ways to Convert kg → Stone kg e.g. 75 kg ÷ 6.35029 75 ÷ 6.35029 = 11.811 st × 0.157473 75 × 0.157473 = 11.810 st = same result
kg ↔ Stone: Body Weight Scale kg stone 50 7.9 60 9.4 70 11.0 80 12.6 90 14.2 100 15.7 110 17.3 120 18.9 130 20.5 63.5 kg = 10 st 76.2 kg = 12 st 88.9 kg = 14 st 101.6 kg = 16 st Scale: 50 kg (7 st 12 lbs) to 130 kg (20 st 7 lbs) Highlighted dots mark exact whole-stone values

Common kg Values in Stone

KilogramsStone (decimal)Stone + lbsPounds
45 kg7.09 st7 st 1 lb99.2 lbs
50 kg7.87 st7 st 12 lbs110.2 lbs
55 kg8.66 st8 st 9 lbs121.3 lbs
60 kg9.45 st9 st 6 lbs132.3 lbs
63.5 kg10.00 st10 st 0 lbs140.0 lbs
65 kg10.24 st10 st 3 lbs143.3 lbs
70 kg11.02 st11 st 0 lbs154.3 lbs
75 kg11.81 st11 st 11 lbs165.3 lbs
76.2 kg12.00 st12 st 0 lbs168.0 lbs
80 kg12.60 st12 st 8 lbs176.4 lbs
85 kg13.39 st13 st 5 lbs187.4 lbs
88.9 kg14.00 st14 st 0 lbs196.0 lbs
90 kg14.17 st14 st 2 lbs198.4 lbs
95 kg14.96 st14 st 13 lbs209.4 lbs
100 kg15.75 st15 st 10 lbs220.5 lbs
101.6 kg16.00 st16 st 0 lbs224.0 lbs
110 kg17.32 st17 st 4 lbs242.5 lbs
120 kg18.90 st18 st 12 lbs264.6 lbs

Full Reference Table (40–140 kg)

kgStone + lbskgStone + lbs
40 kg6 st 4 lbs91 kg14 st 5 lbs
45 kg7 st 1 lb92 kg14 st 7 lbs
50 kg7 st 12 lbs93 kg14 st 9 lbs
55 kg8 st 9 lbs94 kg14 st 11 lbs
60 kg9 st 6 lbs95 kg14 st 13 lbs
65 kg10 st 3 lbs96 kg15 st 1 lb
70 kg11 st 0 lbs97 kg15 st 3 lbs
71 kg11 st 2 lbs98 kg15 st 6 lbs
72 kg11 st 4 lbs99 kg15 st 8 lbs
73 kg11 st 7 lbs100 kg15 st 10 lbs
74 kg11 st 9 lbs105 kg16 st 8 lbs
75 kg11 st 11 lbs110 kg17 st 4 lbs
76 kg11 st 13 lbs115 kg18 st 1 lb
77 kg12 st 1 lb120 kg18 st 12 lbs
78 kg12 st 3 lbs125 kg19 st 9 lbs
79 kg12 st 6 lbs130 kg20 st 7 lbs
80 kg12 st 8 lbs135 kg21 st 4 lbs
85 kg13 st 5 lbs140 kg22 st 0 lbs
90 kg14 st 2 lbs——
💡 Tip: To convert the remainder lbs in the table (e.g., "11 st 7 lbs") back to a pure kg value, use the stone to kg converter and enter both the stone and lbs parts.

Frequently Asked Questions

How many stone is 70 kg?

70 kg = 11.02 stone = 11 stone 0.3 lbs, which rounds to 11 st 0 lbs. Calculation: 70 ÷ 6.35029 = 11.0231 st. The decimal 0.0231 × 14 = 0.32 lbs, so effectively 11 stone exactly.

How many stone is 80 kg?

80 kg = 12.60 stone = 12 stone 8.4 lbs, usually reported as 12 st 8 lbs. Calculation: 80 ÷ 6.35029 = 12.598 st. Remainder: 0.598 × 14 = 8.4 lbs.

How many stone is 100 kg?

100 kg = 15.747 stone = 15 stone 10.5 lbs, usually reported as 15 st 10 lbs. Calculation: 100 ÷ 6.35029 = 15.747 st. Remainder: 0.747 × 14 = 10.5 lbs.

How do I convert stone + lbs to kg?

To convert mixed stone and pounds back to kg: multiply the stone value by 14 to get total pounds, add the remaining pounds, then multiply by 0.453592. Example: 12 st 8 lbs → (12 × 14 + 8) = 176 lbs × 0.453592 = 79.83 kg. See the stone to kg converter for the reverse direction.

Is stone used outside the UK?

The stone is used primarily in the United Kingdom and Ireland for body weight. It is not used in the United States (where pounds are preferred), mainland Europe (metric kilograms), or anywhere else. Even within the UK, official medical records and NHS documentation increasingly use kilograms, though stone remains common in everyday conversation and on consumer bathroom scales.

What is 75 kg in stone and pounds?

75 kg = 11 stone 11 lbs. Working: 75 ÷ 6.35029 = 11.811 st. Whole part = 11 st. Remainder: 0.811 × 14 = 11.4 lbs → 11 lbs. So 75 kg = 11 st 11 lbs.

Sources

References & Further Reading

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