or in metric units
1 cord = (1.22 m) (1.22 m) (2.44 m)
= 3.62 m3
This volume includes bark and air space. Due to the irregular shape of wood the air space in the cord can be as high as 40 percent. The net cord volume can therefore be as low as 75 cubic feet. In general net cord volume ranges 80 - 100 cubic feet.
To calculate the number of cords in a pile of fire wood - measure the length (l), the width (w) and the height (h) of the pile. Calculate the volume of the pile and divide the volume with 128 if your unit is feet - or with 3.62 if your unit is m.
A pile with fire wood is 12 ft long, 2.5 ft wide and 6 ft high. The number of cords in the pile can be calculated as
(12 ft) (2.5 ft) (6 ft) / 128
= 1.4 cord
A pile with fire wood is 6 m long, 1.2 m wide and 1.5 m high. The number of cords in the pile can be calculated as
(6 m) (1.2 m) (1.5 m) / 3.62
= 3 cord
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