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