Kilograms to Tonnes Converter
Convert kilograms to metric tonnes — divide by a thousand. Results update as you type; exact factors shown.
One kilogram is 0.001 tonne (metric ton) — see the exact factor, not a rounded rule of thumb.
How the kilograms to tonnes converter works
Mass converts through the kilogram. The avoirdupois pound has been exactly 0.45359237 kg since 1959, so an ounce is 28.349523125 g and a stone (14 lb) is 6.35029318 kg. A US short ton is 2,000 lb; an imperial long ton is 2,240 lb; a metric tonne is 1,000 kg.
The US uses customary units (US gallon, short ton, °F) in daily life; NIST SP 811 gives the exact SI factors.
Common mass conversions
| From | To | Units |
|---|---|---|
| 100 kg | 0.1 t | kilograms to tonne (metric ton) |
| 500 kg | 0.5 t | kilograms to tonne (metric ton) |
| 1,000 kg | 1 t | kilograms to tonne (metric ton) |
| 1,500 kg | 1.5 t | kilograms to tonne (metric ton) |
| 2,000 kg | 2 t | kilograms to tonne (metric ton) |
| 5,000 kg | 5 t | kilograms to tonne (metric ton) |
| 7,500 kg | 7.5 t | kilograms to tonne (metric ton) |
| 10,000 kg | 10 t | kilograms to tonne (metric ton) |
| 20,000 kg | 20 t | kilograms to tonne (metric ton) |
| 50,000 kg | 50 t | kilograms to tonne (metric ton) |
| 100,000 kg | 100 t | kilograms to tonne (metric ton) |
| 1,000,000 kg | 1,000 t | kilograms to tonne (metric ton) |
Units in this converter and their exact factors
| Unit | Symbol | One unit in kilograms |
|---|---|---|
| milligram | mg | 0.000001 kilogram |
| gram | g | 0.001 kilogram |
| kilogram | kg | 1 kilogram |
| tonne (metric ton) | t | 1,000 kilogram |
| ounce | oz | 0.0283495231 kilogram |
| pound | lb | 0.45359237 kilogram |
| stone | st | 6.35029318 kilogram |
| US ton (short) | US ton | 907.18474 kilogram |
| imperial ton (long) | long ton | 1,016.0469088 kilogram |
FAQFrequently asked questions about mass conversion
How many kilograms in a tonne?
Exactly 1,000.
Is a tonne the same as a ton?
No. A metric tonne is 1,000 kg; a US short ton is 907 kg and an imperial long ton 1,016.
What is 1,500 kg?
1.5 tonnes — about the mass of a small car.
Why the spelling?
Tonne is the metric unit; ton is ambiguous and means different things in the US and UK.
What is a megagram?
The same thing. A tonne is exactly one megagram, though almost nobody says it.
Where these figures come from
- BIPM — The International System of Units (SI Brochure, 9th edition) — definitions of the base and derived units.
- NIST Special Publication 811 — Guide for the Use of the International System of Units — the exact conversion factors used here.
- National Institute of Standards and Technology (NIST) — United States's national measurement authority.
Last checked: September 2026. Conversion factors are fixed by definition and do not change with tax years or regulations.