That's great, I really like it. My main thought is that most of non-american engineers favor SI units, so getting values in cups, ounces and pounds is not too great.
A possible improvement would be to replace freedom units with their international counterpart (with sane rounding to a two digits precision, or similar).
A possible improvement would be to replace freedom units with their international counterpart (with sane rounding to a two digits precision, or similar).