Assumption: 6 x 6 is using inches as the unit (half a foot) and a 4 foot board means 4 square feet of board.
Each square foot of board can be cut into four half foot x half foot pieces.
Therefore, the 4 foot board would be able to make 16 half foot x half foot (6 inch x 6 inch) blocks.
When you say 1 foot block, are they square blocks with side equal to 1 foot, in that case you would need 240 blocks
To cover an 81 square foot area, you first need to convert the dimensions of the 12x12 blocks to square feet. Each 12x12 block is 1 square foot (since 12 inches = 1 foot). Therefore, you would need 81 blocks to cover the 81 square foot space.
150
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132
FOUR
When you say 1 foot block, are they square blocks with side equal to 1 foot, in that case you would need 240 blocks
1.777777
4 board feet in a 1x6x8
8.3 pieces
You measure it by the square foot. The common 'board' is 32 sf. larger boards are also made in many plants.
To cover an 81 square foot area, you first need to convert the dimensions of the 12x12 blocks to square feet. Each 12x12 block is 1 square foot (since 12 inches = 1 foot). Therefore, you would need 81 blocks to cover the 81 square foot space.
150
A 2x12x12 foot board would not be measured in square feet but cubic feet and there would be 240 feet3
None. Board foot is a measure of volume not area.
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A board foot is a unit of volume, while a square foot is a unit of area. The two units are therefore incompatible.