If you’ve ever tried to convert stone to kilograms mid-conversation, you know the feeling of fumbling for the right number. With the stone still widely used in the UK, 10 stone equals exactly 63.5 kg according to the NHS, and this guide provides the full conversion table and manual method.

4 related posts

10 stone in kg: 63.5 kg · 1 stone to kg: 6.35 kg · 1 stone to pounds: 14 lb · 10 stone to pounds: 140 lb

Quick snapshot

1Confirmed facts
2What’s unclear
  • Whether the stone unit is still commonly used in the US — some sources suggest it is, but practice shows it’s rare (Omni Calculator)
  • Exact rounding conventions vary; some tables round to 63.5 kg, others use 63.5029 kg (Omni Calculator)
  • 1 stone = 14 lb (by definition, though some sources debate exact origin) (Omni Calculator)
  • 10 stone = 140 lb (by calculation, but rounding may differ) (Omni Calculator)
3Timeline signal
4What’s next
  • UK healthcare continues to standardise toward metric; NHS published an official updated conversion chart in 2023

Here are the core conversion facts at a glance — four key values that most queries come down to.

1 stone in kg 6.35029 kg
10 stone in kg 63.5029 kg
1 stone in lb 14 lb
10 stone in lb 140 lb

What is 10 stone in kg and pounds?

How many kilograms is 10 stone?

  • 10 stone = 63.5029 kg (exact) — often rounded to 63.5 kg for everyday use (Metric Conversions)
  • The NHS weight conversion chart lists 10 stone 0 lb as 63.50 kg (University Hospitals Sussex NHS Trust weight chart)

How many pounds is 10 stone?

  • 10 stone = 140 lb (since 1 stone = 14 lb) (The Calculator Site)
The upshot

For anyone tracking body weight in the UK, 10 stone is 63.5 kg. That’s the figure you’ll see on NHS scales, and it’s the one that matters most in clinical settings.

The implication: Whether you round to 63.5 kg or use the exact 63.5029 kg, the NHS chart confirms 10 stone as 63.50 kg for clinical use.

How heavy is 10st?

What does 10 stone feel like?

  • 10 stone (63.5 kg) is a common body weight for UK women — the average UK adult male is around 13 stone (82.5 kg) (NHS weight chart)
  • It’s equivalent to about 140 lb or roughly the weight of an adult female Labrador retriever

Average weight comparisons

  • The NHS chart shows 12 stone 11 lb = 81.19 kg, a typical UK male weight
  • 8 stone 10 lb = 55.34 kg, common for smaller adults (University Hospitals Sussex NHS Trust)
Why this matters

If you’re comparing your weight to UK averages, knowing how 10 stone fits in the distribution helps you make sense of the numbers — 63.5 kg is roughly the 50th percentile for UK women.

What this means: 10 stone is a key reference point for UK weight comparison, especially for women.

What is 11 stone in kg?

Seven whole-stone values that cover the most searched range:

  • 8 stone = 50.8 kg (exact: 50.8023 kg)
  • 9 stone = 57.2 kg (exact: 57.1526 kg)
  • 11 stone = 69.9 kg (exact: 69.8532 kg)
  • 12 stone = 76.2 kg (exact: 76.2035 kg)
  • 13 stone = 82.6 kg (exact: 82.5538 kg)
  • 14 stone = 88.9 kg (exact: 88.9041 kg)
  • 17 stone = 108.0 kg (exact: 107.955 kg)

All values are calculated using the exact conversion factor 1 stone = 6.35029 kg (Metric Conversions).

What is 9 and half stone in kg?

What is 10 1/2 stone in kg?

  • 9.5 stone = 60.3 kg (9.5 × 6.35029 = 60.3278 kg)
  • 10.5 stone = 66.7 kg (10.5 × 6.35029 = 66.6780 kg)

Method: multiply the stone value (including fractional part) by 6.35029 to get kilograms.

Bottom line: For UK weight trackers, half-stone conversions are simply 6.35 times the stone value, so 10½ stone equals 66.7 kg — a useful reference for half-stone targets.

What is 65 kg in stones and pounds?

Converting the other direction is just as useful — here’s how two common metric weights translate.

  • 65 kg = 10 stone 3 lb (exact: 65 ÷ 6.35029 = 10.236 stone; 0.236 × 14 = 3.3 lb, usually rounded to 3 lb) (The Calculator Site)
  • 70 kg = 11 stone 0 lb (70 ÷ 6.35029 = 11.023 stone; 0.023 × 14 ≈ 0.3 lb, so just 11 stone)

Method: kg → stone

  1. Divide kilograms by 6.35029 → whole number is the stone value
  2. Multiply the decimal remainder by 14 → gives pounds
  3. Example: 65 kg ÷ 6.35029 = 10.23 → 10 stone; 0.23 × 14 ≈ 3 lb

For quick reference, here is the complete stone-to-kilogram conversion table from 1 to 20 stone.

Stone-to-kilogram conversion (1–20 stone)
Stone Kilograms (exact) Kilograms (typical rounding)
1 6.35029 6.35
2 12.7006 12.70
3 19.0509 19.05
4 25.4012 25.40
5 31.7515 31.75
6 38.1017 38.10
7 44.4520 44.45
8 50.8023 50.80
9 57.1526 57.15
10 63.5029 63.50
11 69.8532 69.85
12 76.2035 76.20
13 82.5538 82.55
14 88.9041 88.90
15 95.2544 95.25
16 101.605 101.6
17 107.955 108.0
18 114.305 114.3
19 120.656 120.7
20 127.006 127.0

The conversion factor used: 1 stone = 6.35029 kg (Metric Conversions). The chart matches the NHS-based rounding seen in hospital scales.

Related reading: **188 cm in Feet: Exact Conversion & Height Percentiles**

Additional sources

unitconverters.net, youtube.com, thecalculatorsite.com, apps.apple.com, stone-synergy.co.uk, vitalicawellness.com

For those tracking weight in smaller increments, the 8 stone in kg conversion provides a similarly precise breakdown.

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Frequently asked questions

How do I convert stone to kg manually?

Multiply the number of stone by 6.35029. For example, 10 stone × 6.35029 = 63.5029 kg. For rounding to one decimal, use 6.35.

What is the formula for converting stone to kg?

Kilograms = stone × 6.35029. This is the exact avoirdupois conversion factor used internationally (Inch Calculator).

Is stone used in the United States?

Very rarely. The US uses pounds for body weight; stone is almost exclusively a UK and Irish unit. Some older US scales include stone markings, but it’s not common (Omni Calculator).

Why is stone still used in the UK?

Tradition and habit. UK healthcare, gyms, and scales continue to display stone and pounds for body weight, and the NHS provides official conversion charts to bridge imperial and metric (Community Pharmacy Scotland NHS chart).

How many pounds are in a stone?

Exactly 14 avoirdupois pounds. This definition was standardised in the 14th century and remains in effect (University of Manchester conversion material).

What is the origin of the stone unit?

The stone originated as a wool-trading unit in medieval England. A stone of wool was 14 pounds, and the measure was later adopted for body weight (The Calculator Site).

Can I use this conversion for body weight?

Yes. The conversion is exact and matches the NHS weight charts used across UK hospitals. For medical purposes, use the full decimal (63.5029 kg) rather than the rounded version.

Confirmed facts vs common misconceptions

Confirmed facts

  • 1 stone = 6.35029 kg (Metric Conversions)
  • 10 stone = 63.5029 kg (exact)
  • 1 stone = 14 lb (University of Manchester)
  • NHS chart shows 10 stone = 63.50 kg (rounded)

Common misconceptions

  • Some online sources round 1 stone to 6 kg, but the correct value is 6.35 kg
  • A few calculators use 6.35029318 instead of 6.35029 — the difference is negligible (0.0003%)
  • Myth: Stone is used in the US for body weight — in reality it’s almost entirely UK/Ireland (The Calculator Site)

The NHS weight conversion chart states that 10 stone 0 lb equals 63.50 kg.

— University Hospitals Sussex NHS Trust Weight Conversion Chart (2023)

1 stone equals 14 pounds and 6.35 kg.

— University of Manchester conversion material

One stone is equal to 6.35029 kilograms.

— Metric Conversions

For UK residents who track their weight in stone, the real-world implication is straightforward: 10 stone is 63.5 kg, and that number matches exactly what NHS scales display. For anyone moving between imperial and metric systems, having this conversion in your back pocket avoids the confusion of half-remembered numbers. The choice is clear: use the exact factor 6.35029 for precision, or rounded 6.35 for everyday conversations — both are backed by the highest authority in UK healthcare.