CBM calculator & container fit
Enter one carton size and quantity. You get the cubic metres, the volume share of each container, and a quick grid estimate of how many fit — plus a one-click link to plan the real 3D load with mixed orientations.
Grid estimate = the best single orientation repeated in rows, columns and layers, ignoring weight. Real loads mix orientations and constraints — the planner's result is usually a little higher for cartons and lower once pallets or fragile items are involved.
How CBM is calculated
CBM (cubic metres) = length × width × height in metres, multiplied by quantity. A carton of 60 × 40 × 40 cm is 0.096 m³; 300 of them are 28.8 m³ — about 87% of a 20' container's 33 m³, which is why they don't all fit once you account for the gaps a real load leaves.
Chargeable weight for air and LCL
Carriers charge the greater of actual weight and volumetric weight. Air freight usually uses 1 m³ = 167 kg (a divisor of 6,000 cm³/kg); LCL sea freight charges per "revenue ton" where 1 m³ = 1,000 kg. The calculator shows both.