How many bricks do you need to cover a 12' X 12' room?

Assuming a brick is 4" x 8", if you lay out your bricks, 3 wide and 3 long, you'll get an area 12 inches x 24 inches. So every 9 brick, you'll cover 2 square feet. This gives the basic calculation of 4.5 bricks per square foot. A 12' x 12' room is 144 square feet. 144 x 4.5 = 648 bricks needed