Convert Tonnes to Kilograms
1 tonne is 1,000 kg. One tonne is exactly 1000 kilograms.
One tonne is 1000 kilograms. To convert tonnes to kilograms, multiply by 1000; to go the other way, divide by 1000 or multiply by 0.001. The factor is exact rather than rounded: it follows from NIST Handbook 44. One thousand kilograms, also called the metric ton — 2,204.6 pounds.
Factor checked against the defining standard · How we check
- Tonnes × 1000
1 * 10001,000 kg
1 tonne in every weight unit
| Unit | Value | Exact factor |
|---|---|---|
| ounces | 35,273.96195 oz | × 35,273.9619496 |
| pounds | 2,204.622622 lb | × 2,204.62262185 |
| stone | 157.4730444 st | × 157.473044418 |
| US tons | 1.102311311 ton | × 1.10231131092 |
| micrograms | 1,000,000,000,000 mcg | × 1,000,000,000,000 |
| milligrams | 1,000,000,000 mg | × 1,000,000,000 |
| centigrams | 100,000,000 cg | × 100,000,000 |
| grams | 1,000,000 g | × 1,000,000 |
| kilograms | 1,000 kg | × 1,000 |
| slugs | 68.52176586 slug | × 68.5217658568 |
| tonnes (as entered) | 1 t | — |
| carats | 5,000,000 ct | × 5,000,000 |
| troy ounces | 32,150.74657 ozt | × 32,150.7465686 |
| grains | 15,432,358.35 gr | × 15,432,358.3529 |
| long tons | 0.9842065276 LT | × 0.984206527611 |
Factors are entered by hand from NIST Handbook 44 rather than derived from a units library, so the ones that terminate are exact rather than rounded.
How do you convert tonnes to kilograms? The converter and the working
- 1.Take the measurement in tonnes.
- 2.Multiply by 1000 — that is how many kilograms fit in one tonne.
- 3.To go back the other way, divide by 1000, or multiply by 0.001.
Worked example: 25 tonnes to kilograms
- Formula
- t × 1000 = kg
- Arithmetic
- 25 × 1000 = 25,000 kg
- Answer
- 25 t = 25,000 kg
The factor is exact, so this figure is exact too — only the display is rounded.
Tonnes to kilograms conversion table
| Tonnes | Kilograms |
|---|---|
| 1 t | 1,000 kg |
| 2 t | 2,000 kg |
| 3 t | 3,000 kg |
| 4 t | 4,000 kg |
| 5 t | 5,000 kg |
| 6 t | 6,000 kg |
| 7 t | 7,000 kg |
| 8 t | 8,000 kg |
| 9 t | 9,000 kg |
| 10 t | 10,000 kg |
| 12 t | 12,000 kg |
| 15 t | 15,000 kg |
| 20 t | 20,000 kg |
| 25 t | 25,000 kg |
| 50 t | 50,000 kg |
| 100 t | 100,000 kg |
| 200 t | 200,000 kg |
| 300 t | 300,000 kg |
| 500 t | 500,000 kg |
| 1000 t | 1,000,000 kg |
| 2000 t | 2,000,000 kg |
| 5000 t | 5,000,000 kg |
| 10000 t | 10,000,000 kg |
A tonne is a megagram, and two other tons are close enough to be confused
The tonne is exactly 1,000 kg — the SI name for it is the megagram, which nobody uses. The US short ton is 907.18474 kg and the British long ton is 1,016.0469 kg, so the three sit within about 10% of each other and a freight or emissions figure is ambiguous without the spelling. "Tonne" and "metric ton" always mean 1,000 kg; a bare "ton" in an American source means the short ton.
NIST Handbook 44, Appendix C — general tables of units of measurement
What is a tonne?
One thousand kilograms, also called the metric ton — 2,204.6 pounds.
What is a kilogram?
The SI base unit of mass, defined since 2019 by fixing the Planck constant rather than by a metal cylinder in Paris.
How many kilograms are in a tonne?
One tonne is 1000 kilograms, exactly. Going the other way, one kilogram is 0.001 tonnes. Both figures come from the same defined relation rather than from a measurement, which is why they are the same today as they were in 1959.
Every weight unit here
The whole group — 15 units with their symbols and the size of each one in kilograms — is on the conversion index, along with every pair it makes. The table above already gives each of them relative to a tonne.
Cite this page
- APA
- Rule Calculator. (2026). Convert Tonnes to kilograms. Rule Calculator. https://rulecalculators.com/convert/tonne-to-kilogram
- MLA
- "Convert Tonnes to kilograms." Rule Calculator, August 16, 2026, https://rulecalculators.com/convert/tonne-to-kilogram.
- Chicago
- Rule Calculator. "Convert Tonnes to kilograms." Rule Calculator. Last reviewed August 16, 2026. https://rulecalculators.com/convert/tonne-to-kilogram.
The date is when the figures on this page were last checked against their source, not the day you opened it. Add your own access date if your style needs one.
Questions people actually ask
- How many kilograms are in a tonne?
- 1000. The SI base unit of mass, defined since 2019 by fixing the Planck constant rather than by a metal cylinder in Paris.
- How do I convert kilograms back to tonnes?
- Divide by 1000, or multiply by 0.001 — they are the same operation.
The values people look up
Each one is this page with the value filled in, and each answers in its own title.
Other weight conversions
Kilograms to tonnes — the same conversion the other way.