Stones to Kilograms Converter
Convert stones to kilograms instantly with our free online tool. Essential for UK body weight, NHS charts, boxing, and horse racing. Accurate st to kg results in real-time.
Weight ConverterThe quick answer for 1 Stones — type any value below for the exact result
Stones
Kilograms
st to kg Conversion Formula
To convert stones to kilograms, multiply the stone value by 6.35029. One imperial stone is defined as 14 pounds, and 14 pounds equal 6.35029 kilograms.
Stones and Kilograms Explained
Stones (st)
A stone (st) is an imperial unit of weight equal to 14 pounds, or 6.35029 kilograms — about the weight of a bowling ball or a car tire. Uniquely among surviving imperial units, it is used almost entirely for one purpose: human body weight. A typical UK adult weighs somewhere between 8 st and 20 st, and British bathroom scales, slimming clubs, and tabloids all speak in stones and pounds rather than pounds alone.
Where it is used: The stone is the everyday body-weight unit in the United Kingdom and Ireland. It also lives on in horse racing handicaps and boxing broadcasts with British heritage.
Origin: Stones were regional market weights for wool and meat since medieval times; in 1385 England fixed the wool stone at 14 lb, and that value survived as the single legal stone.
Kilograms (kg)
A kilogram (kg) is the base unit of mass in the metric system, equal to 1000 grams. It covers the full human scale — a 4 kg house cat, a 32 kg golden retriever, a 70 kg adult, a 120 kg rugby forward — and is the unit medicine, science, and most of the world use for body weight. One kilogram is 2.20462 lb, so 14 lb (one stone) makes 6.35029 kg.
Where it is used: Kilograms are the universal unit for body weight outside the UK and Ireland, mandatory in medical records everywhere, and the standard for BMI calculation on continental health apps.
Origin: The kilogram was created in 1790s France as the mass of a liter of water and became the SI base unit of mass, redefined in 2019 using the Planck constant.
Stones to Kilograms Conversion Table
| Stones (st) | Kilograms (kg) |
|---|---|
| 0.5 st | 3.175145 kg |
| 1 st | 6.35029 kg |
| 2 st | 12.70058 kg |
| 3 st | 19.05087 kg |
| 4 st | 25.40116 kg |
| 5 st | 31.75145 kg |
| 6 st | 38.10174 kg |
| 7 st | 44.45203 kg |
| 8 st | 50.80232 kg |
| 9 st | 57.15261 kg |
| 10 st | 63.5029 kg |
| 11 st | 69.85319 kg |
| 12 st | 76.20348 kg |
| 13 st | 82.55377 kg |
| 14 st | 88.90406 kg |
| 15 st | 95.25435 kg |
| 16 st | 101.60464 kg |
| 17 st | 107.95493 kg |
| 18 st | 114.30522 kg |
| 20 st | 127.0058 kg |
Kilograms to Stones Conversion Table
| Kilograms (kg) | Stones (st) |
|---|---|
| 1 kg | 0.1574731233 st |
| 10 kg | 1.5747312327 st |
| 20 kg | 3.1494624655 st |
| 30 kg | 4.7241936982 st |
| 40 kg | 6.298924931 st |
| 50 kg | 7.8736561637 st |
| 55 kg | 8.6610217801 st |
| 60 kg | 9.4483873965 st |
| 65 kg | 10.2357530129 st |
| 70 kg | 11.0231186292 st |
| 75 kg | 11.8104842456 st |
| 80 kg | 12.597849862 st |
| 90 kg | 14.1725810947 st |
| 100 kg | 15.7473123275 st |
Stones to Kilograms in Everyday Objects
Common real-world examples that make Stones and Kilograms easy to picture at a glance.
| Stones (st) | Kilograms (kg) | |
|---|---|---|
| A house cat | 0.6298924931 st | 4 kg |
| A bowling ball | 0.9999543328 st | 6.35 kg |
| A beagle | 1.5747312327 st | 10 kg |
| A bag of dog food | 1.8896774793 st | 12 kg |
| A golden retriever | 5.0391399448 st | 32 kg |
| A washing machine | 11.0231186292 st | 70 kg |
When You Need Stones to Kilograms Conversions
Filling in Continental Medical Forms
A Spanish clinic form asks for weight in kilograms, but you only know your 15 st reading. Converting to 95.254 kg fills the box accurately — and matters for anesthesia and dosing.
Following UK Weight-Loss Shows
British programs celebrate milestones in stones while international viewers track kilograms. A 20 st starting weight is 127.006 kg, the figure global audiences compare against their own scales.
Reading Horse Racing Handicaps
Race cards assign jockeys their carry in stones. A 10 st handicap is 63.5029 kg including tack, the number international form guides print for overseas punters.
Boxing Weights on Mixed Broadcasts
UK fight promos quote fighters in stones while US networks use pounds and sanctioning bodies use kilograms. A 14 st 6 lb cruiserweight converts to 91.626 kg for the continental tale of the tape.
Related Weight Conversions
How to Use
-
1
Enter Your Weight in Stones
Type the stone value — for example, enter 12 for the classic 12 st (168 lb) reading on a UK bathroom scale
-
2
See the Kilogram Equivalent
The result appears instantly: 12 st = 76.2035 kg, the figure continental doctors and fitness apps work with
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3
Copy or Reverse
Copy the result or click Swap to convert kilograms back to stones
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4
Check the Table
Browse the conversion table for common values like 10 st = 63.5029 kg or 14 st = 88.9041 kg
Why Use Be Converter?
Instant Conversion
Get accurate stone to kilogram results in real-time as you type — enter 12 and see 76.2035 kg before you can say twelve and a half stone
Exact Imperial Standard
Uses the defined relation of 1 st = 14 lb = 6.35029 kg, so a 10 st reading converts to 63.5029 kg exactly as medical charts expect
Body Weight Reference Table
Every whole stone from 6 st to 20 st at a glance — the range NHS BMI charts and UK bathroom scales actually cover
Swap with One Click
Toggle between st and kg instantly — ideal when your bathroom scale reads stones but your fitness app wants kilograms
Free & Unlimited
No registration required. Convert as many weights as you need, from jockey lightweights to heavyweight boxers — always free
Completely Private
All calculations run locally in your browser. Your body weight data never leaves your device
Frequently Asked Questions
How many kilograms are in 1 stone?
How do I convert my weight from stones to kilograms?
What is 10 stone in kilograms?
What is 14 stone in kg?
Which countries still use stones for body weight?
What is 13 stone in kilograms?
How many stones is 70 kg?
Is a stone exactly 14 pounds?
About Stones to Kilograms Converter
Our free online stones to kilograms converter provides instant, accurate conversions between Britain's beloved body-weight unit and the metric standard the rest of the world understands. Whether you are filling in a continental medical form, following a UK weight-loss program, comparing boxing weights on a US broadcast, or reading a horse-racing card, this tool delivers reliable results. The stone equals 14 pounds or 6.35029 kilograms, and it remains the default for personal weight in the United Kingdom and Ireland even as hospitals record kilograms.
Expert Tips for st to kg Conversion
Anchor on two marks: 10 st = 63.5 kg and 11 st = 69.85 kg. Most adult weights fall within a stone of these, so interpolation gets easy — each stone adds 6.35 kg.
UK scales often show stones and pounds together. Convert both parts: 13 st 4 lb is 82.554 kg plus 1.814 kg (4 lb), totaling 84.368 kg for precise records.
NHS BMI calculators accept kilograms. If you only know 16 st, enter 101.605 kg rather than guessing — small errors shift you across BMI category boundaries.
Horse racing handicaps are written in stones. A 9 st carry is 57.1526 kg, the figure international racing form guides publish beside the imperial card.
For quick mental conversion, multiply stones by 6.35: 14 × 6.35 = 88.9 kg, close enough for conversation. Save the exact 6.35029 factor for medical forms and competition weigh-ins.