Tonnes to Kilograms Converter (metric ton)
1 tonne (metric ton) = 1000 kilograms exactly, so to convert tonnes to kilograms multiply by 1000 (e.g. 2.5 tonnes = 2500 kg).
Open the tonnes to kg calculator →Worked example
A ready-mix concrete delivery of 8 tonnes is 8 × 1000 = 8000 kg. A structural steel section weighing 3500 kg is 3500 ÷ 1000 = 3.5 t. Type either unit in the Weight tab and all rows update instantly.
Conversion reference
| Tonnes | Kilograms |
|---|---|
| 0.5 t | 500 kg |
| 1 t | 1000 kg |
| 2.5 t | 2500 kg |
| 5 t | 5000 kg |
| 10 t | 10000 kg |
| 20 t | 20000 kg |
Tonnes are the standard unit for bulk material quantities in construction — concrete, steel, aggregate, and earthworks are all specified in tonnes in metric markets. Arch Convert's Build-mode Weight tab shows tonnes, kilograms, grams, pounds, and US short tons together (plus UK long tons, hundredweight, stone, and more via the Units menu), all routed through an exact gram base so round-trip conversions never drift. The tonne is a pure mass unit — force units like kilonewtons and tonne-force are intentionally excluded.
Frequently asked
- How many kg in a tonne?
- One tonne (metric ton) is exactly 1000 kilograms. The tonne is the SI unit of mass for heavy loads and is defined as 1000 kg = 1 Mg (megagram).
- Is a tonne the same as a metric ton?
- Yes. "Tonne" and "metric ton" are the same unit: 1000 kilograms. The word "tonne" is the international spelling; "metric ton" is preferred in the US to distinguish it from the US short ton (2000 lb = 907.18 kg) and the UK long ton (2240 lb = 1016.05 kg).
- How do I convert kg to tonnes?
- Divide kilograms by 1000 to get tonnes. For example, 2500 kg ÷ 1000 = 2.5 t. Going the other way, multiply tonnes by 1000: 2.5 t × 1000 = 2500 kg.