A metric ton, officially called a tonne, is a metric mass unit equal to 1,000 kilograms. It is used for large-scale quantities in shipping, agriculture, mining, manufacturing, construction, environmental reporting, and international trade.
Quick facts
- Official name
- tonne
- Common name
- metric ton
- Symbol
- t
- Quantity
- mass
- System
- metric, accepted for use with SI
- Kilogram relation
- 1 t = 1,000 kg
- Gram relation
- 1 t = 1,000,000 g
- Pound relation
- 1 t = 2,204.62262185 lb
Visual scale
A metric ton is a bulk-mass unit: far larger than household kilogram measurements and more practical for freight, commodities, vehicles, and industrial materials.
Definition and exact value
The metric ton is exactly 1,000 kilograms. The official unit name is tonne, and the standard symbol is t. Because the relationship is decimal, metric-ton conversions to kilograms and grams are exact powers of ten.
The metric ton measures mass. In everyday industrial and trade language, people may say weight, but technical work should distinguish mass from force when gravity matters.
Symbol and writing rules
The standard symbol for tonne is lowercase t. Unit symbols are not pluralized, so write 5 t, not 5 ts. Put a space between the number and symbol in technical writing.
Unit hierarchy and system context
The metric ton sits above the kilogram in the metric mass hierarchy. It is not the SI base unit for mass; the kilogram is. The tonne is accepted for use with SI because it is practical for large masses.
| Unit | Symbol | Relationship to metric ton | Typical use |
|---|---|---|---|
| gram | g | 1 g = 0.000001 t | food, small goods, lab work |
| kilogram | kg | 1 kg = 0.001 t | packages, body weight, commerce |
| metric ton | t | 1 t | freight, industry, commodities |
| kilotonne | kt | 1 kt = 1,000 t | very large industrial or environmental quantities |
Metric ton vs short ton and long ton
The word ton can mean different units. A metric ton is 1,000 kg. A US short ton is 2,000 lb, about 907.18474 kg. A UK long ton is 2,240 lb, about 1,016.0469088 kg. These differences matter in trade, freight, and commodity pricing.
| Unit | Approximate kilograms | Compared with metric ton | Common context |
|---|---|---|---|
| metric ton / tonne | 1,000 kg | baseline | international metric trade |
| US short ton | 907.18474 kg | about 9.28% lighter | US domestic contexts |
| UK long ton | 1,016.0469088 kg | about 1.60% heavier | historical and some UK/Commonwealth contexts |
Common uses
- International trade, shipping manifests, customs documents, and bulk freight.
- Agricultural products such as grain, feed, fertilizer, and crop yields.
- Mining and commodities such as ore, coal, minerals, sand, and cement.
- Industrial manufacturing, raw materials, waste, recycling, and production totals.
- Environmental reporting, including emissions and large material quantities.
How metric tons are measured
Metric tons are usually measured by first weighing large objects or loads in kilograms using industrial scales, truck scales, weighbridges, or bulk weighing systems, then converting kilograms to tonnes.
- Measure the load with a calibrated scale appropriate for the capacity.
- Subtract tare weight when only cargo or material mass is required.
- Convert kilograms to metric tons by dividing by 1,000.
- Record the value with the symbol t, such as 25.5 t.
Precision and rounding
For general inventory, one decimal place may be enough. For logistics, manufacturing, and trade records, two decimal places are common. Scientific, regulatory, and emissions reporting may require more precision. Do not round intermediate kilogram values before conversion.
Conversion formulas
Metric ton conversion table
| Metric tons | Kilograms | Grams | Pounds | Ounces |
|---|---|---|---|---|
| 0.5 t | 500 kg | 500,000 g | 1,102.311311 lb | 17,636.98097 oz |
| 1 t | 1,000 kg | 1,000,000 g | 2,204.622622 lb | 35,273.96195 oz |
| 5 t | 5,000 kg | 5,000,000 g | 11,023.11311 lb | 176,369.8097 oz |
| 10 t | 10,000 kg | 10,000,000 g | 22,046.22622 lb | 352,739.6195 oz |
| 50 t | 50,000 kg | 50,000,000 g | 110,231.1311 lb | 1,763,698.097 oz |
Common mistakes
- Confusing metric ton and US short ton: a metric ton is 1,000 kg, while a US short ton is about 907.18474 kg.
- Using uppercase T casually: use lowercase t for the tonne symbol in metric notation.
- Pluralizing the symbol: write 10 t, not 10 ts.
- Confusing mass and force: tonne is a mass unit, not a force unit.
- Rounding too early: convert first, then round the final reported value.
Related Xunits pages
Metric ton converters
Weight references
FAQ
How many kilograms are in one metric ton?
One metric ton equals exactly 1,000 kilograms.
Is a metric ton the same as a tonne?
Yes. Tonne is the official unit name, while metric ton is the common English name.
How many pounds are in one metric ton?
One metric ton equals about 2,204.62262185 pounds.
Is a metric ton the same as a US ton?
No. A US short ton is 2,000 pounds, about 907.18474 kg. A metric ton is 1,000 kg.
What is the symbol for metric ton?
The standard symbol for tonne is lowercase t.
Should I write metric ton or tonne?
Use tonne in formal metric contexts and metric ton when writing for readers who may confuse tonne with other tons.
Reference notes
This guide uses the standard tonne relationship of 1 t = 1,000 kg, plus common avoirdupois conversions for pounds and ounces.