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- 1). Measure the width of the board with a tape measure in inches.
- 2). Measure the depth of the board with a tape measure in inches.
- 3). Measure the length of the board with a tape measure in inches.
- 4). Multiply the width by the depth on a calculator. Take that product and multiply it by the length of the board. Divide that result by 144 to determine the board foot measurement of the piece of wood.
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