What this converter does
This converter turns US short tons into metric tons (tonnes) and back, and also covers the imperial long ton and kilograms. Because the three tons are different sizes, converting them correctly avoids costly quantity errors. Type a mass and read the result as you type.
A US short ton is 2,000 lb (907 kg); a metric ton is 1,000 kg; a long ton is 2,240 lb. US aggregate and freight tonnages often need restating in metric tonnes.
The units it covers
The three “tons” differ — each converts through the kilogram with an exact factor.
View all units & their values
| Unit | Symbol | Value | Mainly used |
|---|---|---|---|
| Metric ton (tonne) | t | 1000 | Global standard, 1,000 kg |
| US ton (short) | US ton | 907.18 | US freight & aggregate |
| Imperial ton (long) | long ton | 1016.05 | UK/shipping historic |
| Kilogram | kg | 1 | SI base mass |
The formula
Each ton has a fixed value in kilograms, so any pair converts through the kilogram:
result = value × factor_from ÷ factor_toWhere:
- value = the number you typed, in the “from” unit
- factor_from = the “from” unit’s value in kilograms
- factor_to = the “to” unit’s value in kilograms
Worked example
Convert 110 US short tons of steel to metric tonnes.
1 US ton = 907.18474 kg · 1 t = 1000 kg110 × 907.18474 ÷ 1000 = 99.79 tSo 110 US tons equals about 99.8 metric tonnes on a metric BOQ.
The units in this example
The US customary ton — 2,000 pounds, about 907.18 kg. Standard for aggregate, freight and scrap in the United States.
- 1 US ton = 2,000 lb
- 1 US ton ≈ 907.18 kg
- 1 US ton ≈ 0.9072 t
- 1 US ton ≈ 0.8929 long ton
The global standard ton — exactly 1,000 kilograms. The default mass unit on metric drawings, BOQs and international freight documents.
- 1 t = 1,000 kg
- 1 t ≈ 1.1023 US ton
- 1 t ≈ 0.9842 long ton
- 1 t ≈ 2,204.6 lb