Container Load Calculator – How Many Boxes Fit in a 20ft or 40ft Container?

Optimize your container loading with our Container Load Calculator. Enter your cargo dimensions and container size (20ft, 40ft, 40ft HC) to calculate the maximum number of boxes that can fit, maximizing shipping efficiency.

Container Size

Loading Mode

Length

Width

Height

Weight per Box (kg)

Unit

Loading Plan

Enter box dimensions and click Calculate to see loading plan

Container Loading Tips

Door clearance: Boxes must fit through the container door opening. Our calculator automatically checks door dimensions.
Weight distribution: Distribute heavy boxes evenly and place them at the bottom for stability during transport.
Load factor: Aim for 75-85% volume utilization for practical loading. 100% is theoretical maximum.
Stacking strength: Ensure bottom boxes can support the weight of boxes stacked above them.
Secure the load: Use dunnage bags, straps, or bracing to prevent cargo shift during transit.

Note: This calculator provides an estimate based on ideal rectangular packing. Actual loading may vary based on box strength, loading method, and safety requirements.

Standard Container Specifications

Container	Length	Width	Height	Volume	Max Payload
20ft Standard	5.90m	2.35m	2.39m	33.2 m³	28,200 kg
40ft Standard	12.03m	2.35m	2.39m	67.7 m³	28,600 kg
40ft High Cube	12.03m	2.35m	2.70m	76.4 m³	28,600 kg
45ft High Cube	13.72m	2.35m	2.70m	86.1 m³	29,500 kg

How to Calculate Container Loading

Select Container Size

Choose from 20ft, 40ft, 40ft High Cube, or 45ft High Cube standard containers.

Enter Box Dimensions

Input your carton/box length, width, height, and weight per box.

Get Loading Plan

See maximum boxes that fit, optimal orientation, and volume/weight utilization.

Why Use This Container Load Calculator?

📦 Maximize Container Space

Find the optimal box orientation and loading pattern to fit the maximum number of boxes per container.

⚖️ Weight & Volume Analysis

Track both volume utilization and weight limits to ensure safe, compliant container loading.

🚢 Multiple Container Sizes

Compare loading across 20ft, 40ft, 40ft HC, and 45ft HC containers to choose the most cost-effective option.

🚪 Door Clearance Check

Automatically verifies boxes fit through container door opening before calculating loading plan.

Standard Shipping Container Specifications

Container Type	Internal Length	Internal Volume	Max Payload
20ft Standard	5.90 m	33.2 m³	28,200 kg
40ft Standard	12.03 m	67.7 m³	28,600 kg
40ft High Cube	12.03 m	76.4 m³	28,600 kg
45ft High Cube	13.72 m	86.1 m³	29,500 kg

Container Loading FAQs

How many boxes fit in a 20ft container?

It depends on box size. For standard cartons (40×40×40cm), approximately 1,000-1,200 boxes fit in a 20ft container.

What is the most efficient container loading pattern?

Interlocking patterns (like bricklaying) provide stability. This calculator finds the orientation that maximizes box count while ensuring door clearance.

How do I calculate CBM for container loading?

CBM = Length × Width × Height (in meters). Total shipment CBM = box CBM × quantity. Compare to container volume for utilization percentage.

What is the door opening size for containers?

20ft/40ft Standard: 2.34m wide × 2.28m high. High Cube containers: 2.34m wide × 2.58m high. Boxes must fit through this opening.

Should I fill container to 100% volume?

No, aim for 75-85% practical utilization. 100% is theoretical maximum. Leave space for proper load securing and ventilation.

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