Wow, I would never have guessed British didn't use pounds as a unit when weighting themselves. I thought you were just making fun of how there are always so man

Wow, I would never have guessed British didn't use pounds as a unit when weighting themselves. I thought you were just making fun of how there are always so many units in English for the same measurements, so I went an mentioned yet another mass/weight one. I honestly only remember ever using slugs in some classes in undergrad. I doubt anyone actually ever weights themselves in slugs. Actually, slug is a unit of mass, as opposed to pounds which measure a force. So a slug is the equivalent of a kg and a pound is the equivalent of a Newton. But there is also the 'pound mass' (lbs_m) and the 'kilogram force' (kg_f) to confuse us even more. I always thought it was interesting that the SI system is based around mass, time, and length whereas the English system is based around force, time, and length. Which means that in SI, the Newton is derived from the kg whereas in the English system the slug is derived from the pound. Of course, wikipedia states that the 'stone' unit you were mentioning is both a unit of mass and weight -.- Please correct me if I'm wrong though, that's what I remember from my B.S. in the States (I was born and raised with SI units). Also, is the unit of mass 'slug' ever used in conversations in English speaking countries ? I've never encountered it outside of science problems in my 4 years of undergrad (nor did I after, but I don't live in an English speaking country anymore)