[header] How to calculate cbm [title] Measure the sides of the carton. [step] 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. 
[substeps] 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.