How many square feet are in a two car garage?

A "square foot" is a unit of area measurement equal to a square measuring one foot on each side. 1 Square Foot = 0.0929 square meters. Abbrev.: ft2, sq.ft, SqFt. To calculate the answer you need to know the exact length and width of your garage. Square footage of gargares vares. The garage for my home(2 car garage is is 21' long X 21'wide house was built 1956.