This equation computes the fractional percentage of a cord of wood that you specify by its length (L), its width (W) and its height (H).

Definition

A cord of wood is a standard measure of firewood which is defined to be a tightly stacked pile of wood that is 4 ft. by 4 ft by 8ft -- or 128 cubic feet.

To make the measurement of the stack of wood easier, a cord is usually stacked between straight uprights separated by eight feet, as shown in the picture below, making the calculation a straightforward rectangular volume.

Example

If you have a stack of wood and measure it to be 4 ft by 4 ft by 8 ft, this equation will compute a fractional percentage of 1.0, meaning 1 whole cord.  If you enter 3ft by 4 ft  by 8ft, this equation will compute correspondingly 0.75 cords.