Measurement tool help

A quick question:) Is there a way to measure in other measurements. I’m guessing BU means blender units but I want to measure in feet,inches,ect. I know about going to Scene and changing the units to change sizes but why doesnt the measurement tool change or have a setting to change. Thanks guys.

Is there a tutorial on using the measurement tool at all? I still cant figure out how to measure. Just says BU for the units. I need feet/inches. I find it really odd to have a measurement tool but only in blender units.