How much concrete do you need to cover a driveway 9x150?

To calculate the amount of concrete needed to cover a driveway that is 9 feet wide and 150 feet long, you first find the area by multiplying the width by the length: 9 feet × 150 feet = 1,350 square feet. The depth of the concrete layer is also needed to determine the volume. For example, if you want a thickness of 4 inches (0.33 feet), the volume would be 1,350 square feet × 0.33 feet = 445.5 cubic feet.