Pounds and kilos, grams and ounces, stone and tons (and tons, and tonnes)—Deciphering weights in Italy
Unlike the U.S., where only cocaine ever comes in kilos, in Europe you'll be ordering lots of (perfectly legal) things by the "key."
Actually, when it comes to food you'll more frequently order by the gram, because who needs 2.2 pounds (1 kilo) of anything?
Conveniently enough, 100 grams is just about the perfect amount, per person, of cheese, salamis and other cured meats, fruit, or whatever else you desire in putting together a picnic.
What about stones and tons?
When talking about their weight, many Brits will prefer to "stone."
1 stone = 14 pounds, so someone who says he's "13 stone" weighs around 182 pounds (or 82.5kg).
As for tons, things get a wee bit confusing (and it actually relates to the "stones" thing).
A "ton" in both the U.S. an Imperial systems is equal to 20 hundredweights.
Since an American (and Canadian) hundredweight is, reasonably enough, 100 pounds, a North American ton (sometimes called a "short ton") is 2,000 pounds.
However, since a British hundredweight is equal to eight stone (or 112 pounds), an imperial ton (or "long ton") is 2.240 pounds.
(Want to get more confused? There is also an unoffiiical "tonne" in the metric system equal to 1,000kg, which is 2,204.6 pounds, 1.10 US short tons, or 0.984 imperial long tons. )