A long ton is an English (imperial) measurement and is 2240 pounds. Equal to twenty long hundredweight, which is eight stone or 112 pounds. Much of the old Imperial system truly makes no sense at all! We had an English schoolteacher for third grade (in northern B.C.) who tried to teach us this stuff. In spite of our best efforts to slough it off, some of it stuck. The poor teacher had her work cut out for her when she tried to teach proper English to boys from Texas and Oklahoma, or even Idaho! GD