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How to calculate cbm
Measure the sides of the carton.
You'll need to know the length, width, and height of the rectangular carton. Use a measuring stick to find all three distances and mark them down separately.
Cbm is a measurement of volume, so you'll be using the standard volume formula for rectangular prisms. Example: calculate the cbm of a rectangular package with a length of 15 cm, a width of 10 cm, and a height of 8 cm.