1 tonne is equivalent to how many kilograms?

One tonne is equal to 1000 kilograms. This conversion is based on the metric system, where the prefix 'tonne' specifically refers to the metric ton, which is defined as 1000 kilograms. The metric system relies on a decimal-based structure, where units scale by factors of ten—making it straightforward to convert between units like tonnes and kilograms.

Understanding this conversion is essential in various fields, particularly in trade, logistics, and science, where precise measurements are crucial. The other options do not reflect the standard definition of a tonne, as they either understate or overstate the weight in kilograms. This clarity is vital for ensuring accurate communication and understanding in any context that involves weight measurements.