How do I calculate CBM from centimeters?

Multiply length x width x height in centimeters, then divide by 1,000,000. For example, 120x100x150 cm equals 1,800,000 divided by 1,000,000 = 1.8 CBM. Multiply by the number of identical cartons for the total.

How do I calculate CBM from inches?

Multiply length x width x height in inches, then divide by 61,024 (the number of cubic inches in a cubic meter). A 48x40x60 inch carton is 115,200 / 61,024 = about 1.89 CBM. Alternatively divide cubic inches by 1,728 for cubic feet, then by 35.315.

What is the CBM formula?

CBM = length x width x height, in meters, times quantity. If you measured in another unit, divide by the unit's conversion: cm by 1,000,000, mm by 1,000,000,000, inches by 61,024, or cubic feet by 35.315.

How many cubic feet is 1 CBM?

One CBM equals 35.315 cubic feet. To convert cubic feet to CBM, divide by 35.315; to convert CBM to cubic feet, multiply by 35.315.

The CBM Formula (cm, Inches & mm)

The CBM formula is always length × width × height — the only thing that changes is the divisor for your unit. From centimeters, divide by 1,000,000. From inches, divide by 61,024. From millimeters, divide by 1,000,000,000. From feet, divide cubic feet by 35.315. Then multiply by the carton quantity. Here’s each one with a worked example.

CBM from centimeters

Multiply the three sides in centimeters, then divide by 1,000,000 (because there are 1,000,000 cm³ in a cubic meter). Example: a 120×100×150 cm carton = 1,800,000 ÷ 1,000,000 = 1.8 CBM. This is the most common case, since most cartons are measured in cm.

One formula, one divisor per unit. Get the divisor right and CBM is just multiplication.

CBM from inches

Multiply the three sides in inches, then divide by 61,024 (the number of cubic inches in a cubic meter, 39.37³). Example: a 48×40×60 in carton = 115,200 ÷ 61,024 = 1.888 CBM. Some people first find cubic feet (÷1,728) and then divide by 35.315 — same answer.

CBM from millimeters

Multiply the three sides in millimeters, then divide by 1,000,000,000 (a billion). Example: 1200×1000×1500 mm = 1,800,000,000 ÷ 1,000,000,000 = 1.8 CBM — the same carton as the cm example, as it should be.

CBM from feet, and totalling a load

If you have cubic feet already, divide by 35.315 to get CBM (1 CBM = 35.315 ft³). For a shipment with several carton sizes, run the formula per size, multiply each by its quantity, and add the results — don’t average dimensions. The CBM calculator keeps a line per size and sums them, and the CBM guide covers where the cube goes next.