How to Calculate the Cubic Board Meter


The cubic board meter (CBM) is a unit of measure for lumber used in countries where the metric system is standard. In the United States, board feet (BF) is used. Calculate your CBM from BF using a conversion factor. Because a board foot is so much smaller than a CBM, the calculation is usually done from a thousand board feet (MBF) to CBM. Thus, it is best to first convert your lumber measurement from BF to MBF, and calculate the CBM from there.

Things You'll Need

  • Calculator
  • Take your measurement in BF and divide it by 1,000 to get MBF. For example, if your measurement is 12,000 BF, you would have 12 MBF.

  • Multiply your MBF by 2.36 to get the amount in CBM. In this example, 12 MBF equals 28.32 CBM.

  • Calculate CBM from MBF quickly by multiplying CBM by 0.4238, so 10 CBM is 4.238 MBF.

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