Stone to Metric ton
st
t
Conversion History
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Quick Reference Table (Stone to Metric ton)
| Stone (st) | Metric ton (t) |
|---|---|
| 6 | 0.03810175908 |
| 7 | 0.04445205226 |
| 8 | 0.05080234544 |
| 9 | 0.05715263862 |
| 10 | 0.0635029318 |
| 11 | 0.06985322498 |
| 12 | 0.07620351816 |
| 13 | 0.08255381134 |
| 14 | 0.08890410452 |
About Stone (st)
The stone (st) is a unit of weight equal to 14 pounds (approximately 6.35 kg), used almost exclusively in the United Kingdom and Ireland for expressing human body weight. A person weighing 70 kg is approximately 11 stone. The stone is rarely used outside body weight — commercial goods, food, and science all use kilograms in the UK. The stone is not part of the metric system and has no formal SI equivalent; its continued use is a cultural habit, particularly in older generations and media coverage of boxing and fitness.
Average UK adult body weight is often quoted as 11–13 stone. A jockey must typically weigh under 8.5 stone to compete.
Etymology: From the practice of using actual stones as counterweights on balance scales. Standardised in England at 14 pounds by the Weights and Measures Act 1835.
About Metric ton (t)
The metric ton (or tonne, symbol t) is equal to exactly 1,000 kilograms (1 Mg in SI notation). It is the standard large-mass unit in science, industry, and international trade. The metric ton should not be confused with the US short ton (907 kg) or the imperial long ton (1,016 kg), though all three share the word "ton". The metric ton is used for vehicle curb weight, cargo capacity, CO₂ emissions per year, and bulk commodity pricing. A compact car weighs roughly 1.2–1.5 t; a fully loaded semi-truck can weigh up to 40 t.
A medium-sized car weighs about 1.5 t. A standard shipping container (empty) weighs roughly 2.2 t.
Stone – Frequently Asked Questions
How many pounds are in a stone?
One stone equals exactly 14 pounds. A person who weighs 10 stone weighs 140 pounds (63.5 kg). To convert stone to kilograms, multiply by 6.35; to convert to pounds, multiply by 14.
Do people outside the UK use stone for weight?
Stone is used in the UK and Ireland for body weight but is virtually unknown elsewhere. Australians, Canadians, and New Zealanders — who all once used it — have largely switched to kilograms. Americans use only pounds. If you quote your weight in stone outside the British Isles, expect blank looks.
Why is a stone 14 pounds?
The stone historically varied between 8 and 26 pounds depending on the commodity (wool, meat, cheese). The 14-pound standard was established by the English Weights and Measures Act of 1835, partly because 14 divides evenly into the 28-pound quarter and the 56-pound half-hundredweight.
Is stone used in medical settings in the UK?
The NHS officially uses kilograms in clinical contexts, and most medical equipment is calibrated in kg. However, many patients still report their weight in stone, so UK healthcare professionals routinely work in both systems. Obesity classifications (BMI categories) are always calculated in kilograms.
How do I convert my weight from kilograms to stone and pounds?
Divide your weight in kg by 6.35 to get stone. The whole number is your stone value; multiply the decimal remainder by 14 to get the remaining pounds. Example: 75 kg ÷ 6.35 = 11.81 stone → 11 stone and (0.81 × 14) ≈ 11 lbs, so 75 kg ≈ 11 stone 11 lbs.
Metric ton – Frequently Asked Questions
What is the difference between a metric ton, a short ton, and a long ton?
The metric ton (tonne) is 1,000 kg (2,205 lbs). The US short ton is 2,000 lbs (907 kg). The imperial long ton used in the UK is 2,240 lbs (1,016 kg). All three are called "ton" in common speech, which causes significant confusion in trade and engineering contexts. When precision matters, "tonne" or "metric ton" should be specified.
Is a tonne the same as a ton?
"Tonne" specifically refers to the metric ton (1,000 kg). "Ton" is ambiguous — it may mean metric, short, or long ton depending on context and country. In scientific and international contexts, tonne is preferred for clarity. In the US, "ton" almost always means the short ton (2,000 lbs).
How many kilograms are in a metric ton?
Exactly 1,000 kilograms equal one metric ton (tonne). Equivalently, 1 tonne = 1 Mg (megagram) in strict SI notation, though tonne is the accepted non-SI unit for this mass.
Why is CO₂ measured in tonnes?
CO₂ emissions are measured in metric tonnes because human and industrial activities produce millions to billions of tonnes per year — figures that would be unwieldy in kilograms. A typical passenger car emits roughly 4 tonnes of CO₂ per year; global emissions are around 37 billion tonnes annually.
How heavy is a metric ton in everyday terms?
One metric ton is 1,000 kg — roughly the mass of a small hatchback car, about 10 average adults, or a standard cubic meter of water. A single African elephant weighs approximately 5–6 tonnes; a blue whale can exceed 150 tonnes.