A stone is 14 pounds.
Stones to Metric tons Converter — st to t
Convert Stone (st) to Metric ton (t) using the exact conversion factor (1 stone = 0.0063502932 metric ton). See the formula, worked examples, conversion table, unit comparison, history, and common uses.
Stones to Metric tons converter
Converter
Mass/Weight Converter
Convert SI mass, imperial weight, jewelry, atomic, and astronomy mass units.
Context values
Some unit families need one extra value for a physically accurate result.
A metric ton is 1,000 kilograms.
Result = input x 6.35029318 / 1000.
Mass uses the kilogram as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Stones to Metric tons
Weight conversions between Stone and Metric ton come up constantly in everyday commerce, shipping, and cooking, since US packaging is usually labeled in pounds while most of the rest of the world uses kilograms. Stone is typically associated with united Kingdom and Ireland (body weight), while Metric ton is typically associated with used worldwide except the US, which uses the short ton (2,000 lb).
Formula
metric tons = stones × 0.00635029318
This factor comes from each unit's defined relationship to the category's base unit: 1 stone equals 6.35029318 base units, and 1 metric ton equals 1000 base units, so dividing one by the other gives the direct stone-to-metric ton factor of 0.00635029318.
Simple example
1 st × 0.00635029318 = 0.0063502932 t
1 stone = 0.0063502932 metric tons.
Real-world example
50 st × 0.00635029318 = 0.317514659 t
50 stones = 0.317514659 metric tons.
Conversion table
| Stone (st) | Metric ton (t) |
|---|---|
| 1 st | 0.0063502932 t |
| 5 st | 0.0317514659 t |
| 10 st | 0.0635029318 t |
| 25 st | 0.1587573295 t |
| 50 st | 0.317514659 t |
| 100 st | 0.635029318 t |
Reverse conversion: Metric ton to Stone
0.0063502932 t × 157.4730444 = 1.000000003 st
0.0063502932 metric tons = 1.000000003 stones.
stones = metric tons × 157.473044418
For a page dedicated to this direction, see Metric ton to Stone.
Stone vs. Metric ton
| Aspect | Stone | Metric ton |
|---|---|---|
| Family | UK customary unit | Non-SI unit accepted for use with SI (also called metric ton) |
| Typical use | Body weight reporting in the UK and Ireland (e.g. '12 stone 5 pounds') | International shipping and freight weight |
| Where it's used | United Kingdom and Ireland (body weight) | Used worldwide except the US, which uses the short ton (2,000 lb) |
Understanding the Stone
Stone (st) measures mass. A stone is 14 pounds: exactly 6.35029318 kilograms. It is classified as a UK customary unit.
Where it's used: United Kingdom and Ireland (body weight)
Uses of the Stone today
- Body weight reporting in the UK and Ireland (e.g. '12 stone 5 pounds')
- Historical wool and agricultural produce weighing
History of the Stone
The stone dates to medieval England as a general-purpose weight unit, historically varying by region and commodity (a 'stone' of wool differed from a 'stone' of meat) before settling on 14 pounds for general use. It remains in everyday use for body weight in the UK and Ireland, unlike most other English customary units which have been replaced or supplemented by metric measures.
Historical origin. Stone was not the invention of a single named person; it developed through the process described above.
Understanding the Metric ton
Metric ton (t) measures mass. A tonne is exactly 1,000 kilograms. It is classified as a Non-SI unit accepted for use with SI (also called metric ton).
Where it's used: Used worldwide except the US, which uses the short ton (2,000 lb)
Tonne vs. US (short) ton vs. UK (long) ton. The metric tonne (1,000 kg ≈ 2,204.6 lb) is different from both the US short ton (2,000 lb ≈ 907.2 kg) and the UK long ton (2,240 lb ≈ 1,016 kg) — all three are used in different shipping and industrial contexts and should not be assumed interchangeable.
Uses of the Metric ton today
- International shipping and freight weight
- Industrial and commodity trade (steel, grain, shipping) worldwide
- Vehicle and cargo weight ratings outside the US
History of the Metric ton
The tonne follows directly from the kilogram via the standard 'kilo-' scaling by 1,000, adopted as a convenient large-mass unit alongside the metric system's spread through international trade and industry from the 19th century onward.
Historical origin. Metric ton was not the invention of a single named person; it developed through the process described above.
Stone — sources
- UK Weights and Measures Act 1985 — Confirms the stone (14 lb) as a legally recognized UK unit for body weight.
Metric ton — sources
- BIPM SI Brochure — Non-SI units accepted for use with SI — Lists the tonne among accepted non-SI mass units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many metric tons are in 1 stone?
1 stone equals 0.0063502932 metric tons, using the exact defined conversion factor rather than an estimate.
How do I convert stone to metric ton?
Multiply the stone value by 0.00635029318. The converter above does this instantly to whatever precision you set.
How do I convert metric ton back to stone?
Use the reverse factor: 1 metric ton equals 157.4730444 stones. You can also use the swap control in the converter above to flip the direction instantly.
What is a stone?
Stone (st) measures mass. A stone is 14 pounds: exactly 6.35029318 kilograms. It is classified as a UK customary unit.
What is a metric ton?
Metric ton (t) measures mass. A tonne is exactly 1,000 kilograms. It is classified as a Non-SI unit accepted for use with SI (also called metric ton).
Is the stone to metric ton conversion exact?
Yes. A tonne is exactly 1,000 kilograms. That fixed definition is what the converter above uses, so any rounding you see is a display choice, not a limitation of the math.
What is the difference between tonne vs. us (short) ton vs. uk (long) ton?
The metric tonne (1,000 kg ≈ 2,204.6 lb) is different from both the US short ton (2,000 lb ≈ 907.2 kg) and the UK long ton (2,240 lb ≈ 1,016 kg) — all three are used in different shipping and industrial contexts and should not be assumed interchangeable.
Where is the stone still used today?
United Kingdom and Ireland (body weight)