Squares (Building) to Square Miles: the quick answer
1 sq = 3.58701 × 10⁻⁶ mi²
1 square (building) equals 3.58701 × 10⁻⁶ square miles
To convert squares (building) to square miles, multiply the value by 3.58701 × 10⁻⁶. To go the other way, multiply square miles by 278,784 to get squares (building).