The information provided herein is a reference provided to you at no charge. The information provided is based, in most cases, on the original. specifications. If your vehicle was originally charged with R12 refrigerant, for example, the oil type specified, 'mineral', will not apply.
A square foot (abbreviated as ft2) is a unit of area measurement equivalent to a square measuring 1 foot on every side. One square foot equals to approximately 0.09 square meters. A square foot is a unit of area used mostly in the imperial and U.S. customary measurement systems.
  there are 144 square inches in a square foot, so divide your number of square inches by 144 to get the square feet.