The calculator tests all rectangular orientations for identical cartons, finds the largest whole-number grid and then checks whether payload weight reduces the usable capacity.
Uniform-carton capacity = best whole-number fit across container length × width × height, limited by payloadContainer dimensions used
The presets use representative Hapag-Lloyd general-purpose container dimensions: approximately 5.900 × 2.352 × 2.395 m for a 20-foot standard container, 12.032 × 2.352 × 2.395 m for a 40-foot standard and 12.032 × 2.350 × 2.700 m for a 40-foot high cube.
Hapag-Lloyd explicitly notes that container specifications vary by manufacturer. Always verify the specific equipment offered for a critical load plan.
Space-limited vs payload-limited
Light cartons usually run out of cubic space first. Dense products can hit the maximum payload before filling the available cube. Enter carton weight so the calculator can show which constraint governs the estimate.
What this tool does not model
This is a uniform-box rectangular packing estimate. It does not model mixed SKUs, carton deformation, door-clearance restrictions, axle or floor-load limits, bracing, dunnage, dangerous goods segregation or practical loading gaps. Treat the result as a planning maximum, not a certified stuffing plan.
Frequently asked questions
How many CBM fit in a 40ft container?
The Hapag-Lloyd 40-foot standard example used here lists about 67.7 m³ of nominal internal capacity. Practical cargo utilization is lower because real loads leave gaps.
How much fits in a 40ft high cube?
The representative 40-foot high-cube preset lists about 76.3 m³ of nominal internal capacity. Carton shape, orientation and payload determine the actual count.
Does the calculator rotate cartons?
Yes. For stackable cartons it tests all six rectangular orientations and keeps the highest whole-number grid count.
Are container dimensions always identical?
No. Dimensions and payload ratings vary by manufacturer and specific container. Verify the equipment supplied by the carrier.
Sources & verification
Verify carrier-sensitive rules against the source governing your shipment.
Formula reviewed September 29, 2026 Representative values and boundary cases are tested automatically.