lb/ft is not a pressure, it has the wrong dimensions, which are force divided by area. lb/ft^2 would be a pressure.
The converter on this very site can help you. The pressure page is
http://www.convert-me.com/en/convert/pressure
If you put 1 in the "bar" box and hit "convert," you'll see that 1 bar is 2088.543 lb/ft^2