Weight converter

Nine units of mass at once, including the two tons that are not the same thing. The pound is exactly 0.45359237 kilograms by definition, so every imperial unit here follows exactly from the metric one.

Two things routinely go wrong. The ton is three different quantities: a US short ton is 2,000 pounds, a UK long ton is 2,240, and a metric tonne is 1,000 kilograms — about 2,205 pounds, so it sits between the two. All three are listed separately here. The other is stone, which is fourteen pounds and is still how body weight is usually given in Britain and Ireland; 11 stone 4 is 158 pounds, not 11.4 stone, and treating the part after the space as a decimal is a common and expensive mistake.