How this calculator works
Capacity checks all six right-angle carton orientations, the selected container door opening, planning allowance and payload limit.
Using this result
The result is a mathematical right-angle grid, not a guaranteed loading quantity.
Next step: Reduce the estimate for door clearance, dunnage and access, then verify payload and the supplied container dimensions.
Worked example
A 60 × 40 × 35 cm carton is checked in all six orientations. An 85% planning allowance is then applied before the payload limit is checked.
How to measure
- Use external carton dimensions.
- Allow space for dunnage and loading access.
- Verify the specific equipment supplied by your carrier.
Common mistakes
- Treating theoretical capacity as a loading guarantee.
- Ignoring payload weight.
- Assuming every container has identical internal dimensions.
Planning note: This result is an estimate, not a carrier quote. Equipment, services, limits and rounding rules can vary. Confirm operational decisions with the relevant provider.
Formula implementation and worked example reviewed September 9, 2026. See the methodology and sources.