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Brereton Log Rule Calculator

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Calculate the Board Feet of a Log using the Brereton Log Rule.

Two diameter measurements shall be taken under bark at each log end perpendicular to each other (at both ends) and the final recorded diameter shall be the average of the two measurements.

Brereton's board foot value is calculated from cubic feet of log * 12.

Diameter Measured Inside Bark = DIB
Average = Small End plus Large End Divided by Two
Length of Log in Feet ft
DIB Average inch


Board Feet: bf

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