I just noticed that a lot of people confuse what exactly a ton is, and the truth is there is more than one version depending on where you live. A ton in the United States is not the same as in Europe or the rest of the world.

Basically, there are three main types. The short ton used in the Estados Unidos is 2,000 pounds (about 907 kg), the long ton still used in Reino Unido and some countries is 2,240 pounds (1,016 kg), and the metric ton, which is the international standard, is exactly 1,000 kg. It may seem slightly smaller, but when you’re shipping large loads, those differences matter quite a lot.

The history behind all of this is interesting. It comes from an old English word, “tunne,” which was basically a giant barrel used to store wine and other things. Eventually, the terminology was adapted to measure cargo on ships, and each region ended up with its own version depending on its commercial needs. The metric ton was standardized later as part of the Sistema Internacional so that everyone speaks the same “language.”

Today, you see tons everywhere. Shipping companies use them constantly, in mining and construction everything is weighed in tons, and even environmental reports on carbon emissions are measured this way. Even in everyday life, people say “I have tons of work” to exaggerate that they have a lot.

What matters is that when two companies are negotiating—especially if one is in EE.UU. and the other is in Europe—they have to make clear which ton they’re using. Getting it wrong can cost money. That’s why science always uses the metric ton, to avoid confusion.

One interesting fact: there is the “refrigeration ton,” which measures a system’s cooling capacity, equivalent to the amount of cooling produced by a ton of ice melting in 24 hours. Strange things that exist, but that few people know about.