Convert lumber size and length into board feet and cost.
A board foot is a lumber volume unit equal to a one-inch-thick, twelve-inch-wide, one-foot-long piece. Multiplying by the number of boards and the price gives the total cost. Softwood lumber is sold by the board foot, so converting nominal sizes to board feet is the only way to compare prices between different dimensions.
Lumber Board Feet
Board feet = thickness x width x length / 12
Board feet = thickness x width x length / 12 A board foot is a lumber volume unit equal to a one-inch-thick, twelve-inch-wide, one-foot-long piece. Multiplying by the number of boards and the price gives the total cost.
Softwood lumber is sold by the board foot, so converting nominal sizes to board feet is the only way to compare prices between different dimensions.
This calculator takes 5 inputs: Thickness, Width, Length, Number of boards, Price per board foot. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.