How many board feet 1x6x12 tongue and groove boards in 500 sq ceiling?

To calculate the number of board feet needed for a 500 square foot ceiling using 1x6x12 tongue and groove boards, first determine the coverage of each board. A 1x6 board is typically 5.5 inches wide and 12 feet long, covering about 5.5 square feet. Therefore, for a 500 square foot ceiling, you would need approximately 91 boards (500 sq ft ÷ 5.5 sq ft/board). Each board is 1 board foot per linear foot, so the total board feet needed would be roughly 91 board feet.