Kg to tonnes (kg to t)

One kilogram is exactly 0.001 metric tonnes. A tonne is defined as a thousand kilograms, so this is a shift of the decimal point.

Worked through: 1,500 kg x 0.001 = 1.5 t.

Going the other way, one metric tonne is 1,000 kilograms.

For mental arithmetic: Move the decimal point three places left.

Bulk goods (grain, scrap metal, aggregate, fertilizer) are weighed in kilograms and priced in tonnes, so this is the step between the weighbridge ticket and the invoice. 2,350 kg at a price per tonne is 2.35 tonnes. The usual mistake is the ton rather than the arithmetic: a price quoted 'per ton' in the US is almost certainly per short ton of 907 kg, which makes the same load 2.59 tons and the bill 10% higher. If a per-ton price comes from the US, convert on the kilograms-to-US-tons page instead.

Precision is worth matching to the input. A measurement given as 100 kg carries one or two significant figures, and reporting its conversion to six implies a precision the original never had.