Container planning calculator
Compare estimated carton capacity for 20GP, 40GP and 40HC containers using carton dimensions, weight and payload limits.
Compare theoretical 20GP, 40GP and 40HC carton capacity as you enter values.
Use the outside dimensions of one packed carton.
Weight is optional; zero means payload is not evaluated.
This estimator tests six axis-aligned carton orientations using a regular grid. It is not a 3D packing simulation.
Capacity, utilization and the limiting factor update from your current inputs.
Add the total cartons to see a planning recommendation across the three tested container types.
Best orientationAdd valid carton dimensions.
Dimensional capacity0 cartons
Weight capacityNot evaluated — no carton weight entered.
Cargo at capacity0 m³ · 0 kg
First containerCannot estimate until the carton fits a tested container.
Best orientationAdd valid carton dimensions.
Dimensional capacity0 cartons
Weight capacityNot evaluated — no carton weight entered.
Cargo at capacity0 m³ · 0 kg
First containerCannot estimate until the carton fits a tested container.
Best orientationAdd valid carton dimensions.
Dimensional capacity0 cartons
Weight capacityNot evaluated — no carton weight entered.
Cargo at capacity0 m³ · 0 kg
First containerCannot estimate until the carton fits a tested container.
Planning estimate only. Actual equipment dimensions, tare weight and payload vary by manufacturer, shipping line, equipment and local transport rules. Door openings, pallets, dunnage, securing and real loading practice can reduce usable capacity.
How to use
Enter one packed-carton size, its gross weight and shipment quantity to compare the same planning assumptions across three common container types.
Add the outside dimensions of one packed carton.
Use gross weight per carton to check the payload limit.
Add the total cartons you need to ship.
Review 20GP, 40GP and 40HC under the same assumptions.
See whether dimensions or payload limits each container first.
Use cases
Use a clear single-carton planning baseline before selecting equipment or reviewing a supplier packing list.
Compare estimated carton capacity before you request FCL equipment.
Check whether supplied carton size and weight support the planned load.
Estimate how many tested containers a known shipment may need.
See when carton dimensions create unused container space.
Find the smallest tested container that fits one shipment under current assumptions.
Bring dimensional and payload assumptions into an early logistics plan.
Transparent methodology
This is a regular-grid planning estimate, not an advanced 3D packing or operational loading simulation.
Carton CBM = length × width × height in meters
Orientation fit = floor(container L ÷ carton A) × floor(container W ÷ carton B) × floor(container H ÷ carton C)
Dimensional capacity = maximum fit across six axis-aligned orientations
Weight capacity = floor(container payload ÷ carton weight)
Estimated capacity = lower of dimensional and weight capacity
Volume utilization = cargo volume at capacity ÷ geometric internal volume
Weight utilization = cargo weight at capacity ÷ payload
Containers needed = ceil(shipment quantity ÷ estimated capacity)
Frequently asked questions
Understand what the estimate compares and where actual loading requires additional operational checks.
It tests all six axis-aligned orientations of one carton in a regular grid, then compares the dimensional capacity with the payload-based capacity for each tested container.
No. It uses whole-carton grid fit along container length, width and height, so unused gaps caused by carton dimensions are reflected in the estimate.
This V1 tool compares planning presets for 20GP, 40GP and 40HC equipment.
A dense carton can reach the stated payload before the dimensional grid is filled. The result then identifies Payload / Weight as the limiting factor.
The calculator keeps the dimensional capacity and marks payload as not evaluated. Use a real gross carton weight whenever it is available.
No. Door openings, pallets, dunnage, load securing, operating practice and actual equipment can change physical loading feasibility.
No. It tests six single-orientation, axis-aligned regular grids. Mixed orientations, interlocking layouts and advanced 3D loading belong to a later Container Load Estimator.
No. It only identifies the smallest tested container that fits, or the option with the fewest containers when unique. Freight rates, availability and local charges still need commercial review.
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