Stones to Kilograms Calculator — Instant st to kg Conversion
Convert stones to kilograms (and pounds) instantly with our free online tool. Essential for American fans of British boxing, Premier League rosters, UK TV shows, and travel forms. Accurate st to kg results in real time.
US Weight Converter CalculatorThe 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 — the unit your doctor's scale and US bathroom scale use — and 14 pounds equal 6.35029 kilograms.
Stones and Kilograms Explained
Stones (st)
A stone (st) is an imperial unit of weight equal to exactly 14 pounds, or 6.35029 kilograms — about the weight of a bowling ball or a car tire. While Americans almost never weigh themselves in stones, the unit survives for essentially one purpose: human body weight in Britain. 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 British boxing broadcasts that American audiences increasingly follow.
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 (about 2.2 pounds). It covers the full human scale — a 4 kg house cat, a 32 kg golden retriever, a 70 kg adult, a 140 kg NFL lineman — and it 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 US, Liberia, and Myanmar, mandatory in medical records across Europe and Asia, and the standard for international health apps and Olympic weigh-ins.
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 large 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 Out Medical Forms While Traveling
A clinic in Barcelona or a travel-insurance form asks for your weight in kilograms, but you only think in pounds. Your 15 st reading is 95.254 kg — about 210 pounds — and getting it right matters for anesthesia and dosing.
Following British Weight-Loss Shows
UK programs celebrate milestones in stones while American viewers think in pounds. A 20 st starting weight is 127.006 kg — that's 280 pounds, a figure US audiences can instantly relate to on their own scales.
Comparing Horse Racing Weights
British race cards assign jockey carries in stones, while American tracks from Saratoga to Santa Anita list everything in pounds. A 10 st handicap is 63.5029 kg including tack — exactly 140 pounds, easy to line up against any US racing form.
Boxing Tale of the Tape Across Broadcasts
UK fight promos quote fighters in stones, while American networks use pounds and sanctioning bodies like the athletic commissions use kilograms. A 14 st 6 lb cruiserweight converts to 91.626 kg — about 202 pounds — for the tale of the tape.
Related Weight Conversions
How to Use
-
1
Enter the Weight in Stones
Type the stone value — for example, enter 12 for a 12 st reading. That's 168 pounds, the number your bathroom scale back in Houston would show
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2
See the Kilogram Equivalent
The result appears instantly: 12 st = 76.2035 kg, the figure international clinics, Olympic weigh-ins, and health apps around the world actually use
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3
Copy or Reverse
Copy the result or click Swap to convert kilograms back to stones — handy when you're filling out forms in two different unit systems
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4
Check the Table
Browse the conversion table for common values like 10 st = 63.5029 kg (140 lb) or 14 st = 88.9041 kg (196 lb)
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 (168 lb) before your coffee gets cold
Exact Standard, Every Time
Uses the defined relation of 1 st = 14 lb = 6.35029 kg, so a 10 st reading converts to 63.5029 kg (140 lb) — exactly what international medical forms and weigh-ins expect
Body Weight Reference Table
Every whole stone from 6 st to 20 st at a glance — the range British bathroom scales and UK fitness charts actually cover, mapped against familiar pound equivalents
Swap with One Click
Toggle between st and kg instantly — ideal when a clinic abroad wants kilograms but your scale back home in Chicago reads only pounds
Free & Unlimited
No registration required. Convert as many weights as you need, from jockey fees to UFC tale-of-the-tape numbers — always free
Completely Private
All calculations run locally in your browser. Your body weight data never leaves your device — no accounts, no tracking, no exceptions
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 delivers instant, accurate conversions between Britain's favorite body-weight unit and the metric standard used almost everywhere else — plus the pounds that Americans know best. Whether you're following a heavyweight title fight promoted by a UK outfit, checking a Premier League player's listed weight, watching a British weight-loss program, or filling out a medical or insurance form while traveling in Europe, this tool gives you reliable numbers in real time. The stone equals 14 pounds or 6.35029 kilograms, and it remains the everyday unit for personal weight in the United Kingdom and Ireland even as hospitals there record kilograms.
Expert Tips for st to kg Conversion
Anchor on two marks: 10 st = 63.5 kg (140 lb) and 11 st = 69.85 kg (154 lb). Most adult weights fall within a stone of these, so estimating gets easy — each stone adds 6.35 kg, or 14 lb.
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 — about 186 pounds — for precise records.
International BMI calculators and health apps accept kilograms. If you only know 16 st, enter 101.605 kg rather than guessing — small errors can shift you across a BMI category boundary on a clinic's chart.
British race cards assign jockey weights in stones. A 9 st carry is 57.1526 kg — about 126 pounds, right in the range of the jockey fees listed at American tracks like Churchill Downs, where the same weight is simply printed in pounds.
For quick mental conversion, multiply stones by 14 to get pounds first: 14 st × 14 = 196 lb, which is 88.9 kg. Save the exact 6.35029 factor for medical forms and official competition weigh-ins.