BOARD FOOTAGE ON LUMBER IS EASY THERE IS A SIMPLE FORMULA TO FOLLOW
WIDTH X LENGTH DIVIDED BY 144 OR 12 TIMES THE THICKNESS
(IF YOU MULTIPLY INCHES TIMES INCHES YOU DIVIDE BY 144, IF YOU MULTIPLY INCHES TIMES FEET YOU DIVIDE BY 12)
FOR EXAMPLE: IF YOU HAVE A BOARD THAT IS 9 INCHES WIDE BY 10 FEET LONG BY 1 INCH THICK HERE IS THE FORMULA
9 INCHES X 120 INCHES DIVIDED 144 X 1 (THICKNESS) = 7.50 SF
9 INCHES X 10 FEET DIVIDED BY 12 X 1 (THICKNESS) = 7.50 SF
REMEMBER IT IS VERY IMPORTANT YOU DON'T FORGET TO MULTIPLY TIMES THE THICKNESS HERE WE USED 1 INCH THICKNESS FOR AN EXAMPLE. BOARDS VARY IN THICKNESS AND IT MAKES A VERY BIG DIFFERENCE ON THE BOARD FOOTAGE.