About the kg to t calculation
One kilogram is exactly 0.001 tonnes, so converting between them is a single multiplication. Enter any value above and the result updates as you type. The SI base unit of mass, and how bodyweight is quoted in most of the world. A metric tonne is exactly 1,000 kg — not the same as a US or imperial ton.
Formula
t = kg × 0.001
1 kg = 0.001 t
1 t = 1,000 kgWorked example
To convert 70 kg, multiply by 0.001: 70 × 0.001 = 0.07 t.
Frequently asked questions
How many tonnes are in a kilogram?
There are 0.001 tonnes in one kilogram. To convert any amount, multiply the number of kilograms by 0.001.
How do I convert tonnes back to kilograms?
Divide instead of multiplying, or equivalently multiply by 1,000. One tonne is 1,000 kilograms.
Is this conversion exact?
Yes. Since the international agreement of 1959, the relationship between kilograms and tonnes is defined exactly rather than measured, so the only rounding here is in how many decimal places we show.
Where is each of these units used?
Kilograms: the SI base unit of mass, and how bodyweight is quoted in most of the world. Tonnes: a metric tonne is exactly 1,000 kg — not the same as a US or imperial ton.
Sources
- NIST Special Publication 811 — Guide for the Use of the International System of Units