Pick the container type and enter the box size to find how many boxes fit, how full the container is and the total weight.
Last updated: November 7, 2026
Inside dimensions, orientation and payload
The calculation counts how many times the box fits along each inside dimension of the container: • Boxes = (inside length ÷ box length) × (inside width ÷ box width) × (inside height ÷ box height), each factor rounded down • With 'Keep upright' the box is only turned on the floor; with 'Any orientation' all six positions are tried and the best one is used Approximate inside dimensions: a 20 ft container is 590 × 235 × 239 cm (about 33 m³), a 40 ft is 1203 × 235 × 239 cm (about 67 m³) and a 40 ft HC is 1203 × 235 × 269 cm (about 76 m³). Payload limits used are about 28,000 kg for a 20 ft, 26,700 kg for a 40 ft and 26,500 kg for a 40 ft HC. Example: 100 × 100 × 100 cm boxes fit 5 × 2 × 2 = 20 in a 20 ft container. The calculation stacks boxes in one uniform grid; a mixed layout can sometimes fit a few more, and door clearance, pallets and bracing take space. Use the result as a planning lower bound and confirm the final load with your carrier.
Common questions about loading containers
Approximately: 20 ft is 590 × 235 × 239 cm, 40 ft is 1203 × 235 × 239 cm and 40 ft HC is 1203 × 235 × 269 cm. They can differ by a few centimeters between makers.
Other tools you may find useful
Standard dry container, inside dimensions.
One side of the box.
The other side of the box.
Stays vertical when 'Keep upright' is on.
Weight of one box.