CBM Calculator (Cubic Meters for Shipping)

What Is CBM? CBM stands for Cubic Meter, the standard unit for measuring cargo volume in international shipping and freight logistics. One CBM equals a cube 1 metre long by 1 metre wide by 1 metre high, which is 1,000 litres or about 35.3 cubic feet.

The CBM Formula CBM = Length (m) x Width (m) x Height (m). For multiple cartons of the same size: Total CBM = Length x Width x Height x Quantity. If dimensions are in centimetres, divide by 1,000,000, or divide each dimension by 100 first. If in inches, multiply the result by 0.0000164.

Standard Container Capacities

TEU stands for Twenty-foot Equivalent Unit, the industry’s counting unit for container traffic. The calculator uses 27, 57 and 66 CBM, sitting near the top of each usable band.

Why CBM Matters for Pricing LCL (Less than Container Load) ocean freight is priced per CBM or per metric ton, whichever is greater. That rule is the “revenue ton”, and it is why a heavy, compact shipment and a light, bulky one of the same size can be quoted quite differently.

Air freight uses volumetric weight instead: one cubic metre is treated as 166.67 kg under the IATA standard, which is the same 6,000 cm³ per kg the parcel carriers use. Compare that figure against the actual scale weight and the higher one is what gets billed.

Loading Efficiency Real-world container loading rarely achieves 100% of internal volume. Irregular carton shapes, stacking limits, and the space needed to work reduce what actually fits. Professional loading typically lands at 80 to 90%. The fit estimates below divide usable volume by carton volume, which is an upper bound rather than a promise: cartons that do not tile neatly into the container’s floor plan will come up short of it, sometimes badly.