Construction/Home calculator
Container Loading Calculator
Estimate how many equal-size items fit in a 20 ft, 40 ft, high-cube, or custom container using a transparent layer grid method.
FormulaItems loaded = max(floor(L/itemL) x floor(W/itemW), floor(L/itemW) x floor(W/itemL)) x floor(H/itemH)
Formula
Container grid loading estimate
Container loading estimates are simplified. Confirm real loading plans with logistics, weight, safety, and carrier constraints.
Items loaded = max(floor(L/itemL) x floor(W/itemW), floor(L/itemW) x floor(W/itemL)) x floor(H/itemH)
A 20 ft container with 120 x 100 x 100 cm items fits 8 per layer and 2 layers, or 16 items.
SourcesThis calculator includes source notes, assumptions, and exclusions so the result is easier to verify before use.
Sources and assumptions
Source notes
This calculator includes source notes, assumptions, and exclusions so the result is easier to verify before use.
- Effective year
- Current rules
- Last verified
- 2026-06-18
Container loading estimates are simplified. Confirm real loading plans with logistics, weight, safety, and carrier constraints.
Assumptions
- Container presets use approximate internal dimensions in centimeters.
- Items are identical rectangular boxes.
- The calculator compares normal and rotated floor orientation, then stacks full layers.
Not included
- Mixed cargo, pallets, door clearance, dunnage, lashing, axle limits, container payload limit, center of gravity, hazardous goods, and professional load plans.
FAQ6 common questions for this calculator.
FAQs
Does this solve full 3D bin packing?+
No. It gives a clear same-size item grid estimate. Mixed sizes and advanced packing need dedicated load planning.
Can I enter custom container dimensions?+
Yes. Choose custom container and enter internal length, width, and height in centimeters.
How does the Container Loading Calculator calculate the result?+
For the Container Loading Calculator, it uses the Container grid loading estimate: Items loaded = max(floor(L/itemL) x floor(W/itemW), floor(L/itemW) x floor(W/itemL)) x floor(H/itemH). A 20 ft container with 120 x 100 x 100 cm items fits 8 per layer and 2 layers, or 16 items.
What information do I need to use the Container Loading Calculator?+
For the Container Loading Calculator, enter a transparent layer grid method. Keep the units consistent with the calculator fields and compare your setup with the worked example on the page.
How accurate is the Container Loading Calculator?+
Container Loading Calculator is a material estimate based on the dimensions, unit system, and allowance values entered. It uses the Container grid loading estimate, but cuts, openings, site conditions, pack sizes, and code requirements can change the final quantity.
What should I check before using the Container Loading Calculator result?+
For the Container Loading Calculator, check a transparent layer grid method, unit system, waste allowance, openings, site conditions, and supplier pack size. Use the estimate as a planning quantity before ordering materials.
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How to use the Container Loading Calculator
Estimate how many equal-size items fit in a 20 ft, 40 ft, high-cube, or custom container using a transparent layer grid method. The page also explains the container grid loading estimate and shows a practical example: A 20 ft container with 120 x 100 x 100 cm items fits 8 per layer and 2 layers, or 16 items.
- 1
Enter your details
Enter a transparent layer grid method, then complete any other fields shown in the calculator.
- 2
Check the calculation
Review the result alongside the container grid loading estimate: Items loaded = max(floor(L/itemL) x floor(W/itemW), floor(L/itemW) x floor(W/itemL)) x floor(H/itemH).
- 3
Compare scenarios
Change one or more inputs to see how they affect the container Loading Calculator result before you use the estimate.