Convert from Feet to Metres.
Feet =Convert from Metres to Feet.
Metres =Convert from Miles to Kilometres.
Miles =
Convert from Kilometres to Miles.
Kilometres =Mind you, there are quite a few other measurements we could convert too - maybe I'll do some more later!
Most of the world uses metric, expect the United States of America, who proudly add that they were one of the ones that encouraged the rest of the world to use it only to not use it themselves.
They also, rather rudely, insist of spelling metres 'meters' - which naturally means something entirely different.
As a meter is one of these: 