Convert tons to kg (ton to kg)

One US short ton is exactly 907.18474 kilograms: 2,000 pounds, and the pound has been exactly 0.45359237 kg since the 1959 international yard and pound agreement. Exact, and unround because the pound is.

Worked through: 3 ton x 907.18474 = 2,721.55 kg.

Going the other way, one kilogram is 0.0011023113 short tons.

For mental arithmetic: Multiply by 900 and add 0.8%. Or: a short ton is about 10% less than a tonne.

Read the word before converting it. This converter's ton is the US short ton of 2,000 lb, which is what 'ton' means in an American context. Almost everywhere else 'ton' means the metric tonne, which is exactly 1,000 kg, and that is probably what '1 ton to kg' wants if the question came from outside the US, in which case the answer is 1,000. The third ton is the British long ton of 2,240 lb, or 1,016.05 kg. The three sit within 12% of each other, so a wrong guess is never obviously wrong, and a shipping quote, a scrap price or a vehicle rating that says only 'ton' is ambiguous until the country is known.

Precision is worth matching to the input. A measurement given as 0.25 ton carries one or two significant figures, and reporting its conversion to six implies a precision the original never had.