Container Load Calculator
Calculate how your cargo fits in shipping containers. Get 3D visualization, weight distribution analysis, and LCL vs FCL recommendations.
How to Use
- 1Add your cargo — Enter dimensions, weight, and quantity for each item type
- 2Review the results — See utilization, weight distribution, and container recommendations
- 3Unlock full analysis — Enter your email to access 3D visualization and detailed insights
The calculator automatically selects the optimal container size (20', 40', or 40' High Cube) and splits cargo across multiple containers when needed.
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Container Weight Distribution Guide
Proper weight distribution is critical for safe transport, regulatory compliance, and preventing cargo damage during shipping.
Container Weight Distribution Diagram
The 60/40 Weight Distribution Rule
For optimal stability, approximately 60% of the cargo weight should be positioned toward the front of the container (door end) and 40% toward the rear.
This distribution ensures safe crane handling at ports, proper balance on truck chassis, and compliance with road transport regulations.
Heavy Items at Bottom
Place heaviest cargo on the container floor first. This lowers the center of gravity and prevents top-heavy instability.
Even Side-to-Side
Distribute weight evenly between left and right sides. Uneven lateral weight can cause container tilting and chassis stress.
Spread Point Loads
Heavy point loads can damage container floors. Use dunnage or spreader boards to distribute concentrated weight.
Container Weight Limits
| Container | Max Payload | Tare Weight | Max Gross | Floor Load |
|---|---|---|---|---|
| 20ft Standard | 28,200 kg | 2,300 kg | 30,480 kg | 1,450 kg/m² |
| 40ft Standard | 26,680 kg | 3,800 kg | 30,480 kg | 1,450 kg/m² |
| 40ft High Cube | 26,460 kg | 4,020 kg | 30,480 kg | 1,450 kg/m² |
Container Loading Patterns
Different cargo types require different loading strategies. Choose the right pattern to maximize space utilization and cargo stability.
Column Stacking
Best for uniform cargoStack identical pallets or boxes directly on top of each other in vertical columns. Ideal for uniform cargo that can bear weight.
Interlocking Pattern
Maximum stabilityAlternate pallet orientation between layers (90° rotation). Creates a brick-like pattern that prevents shifting during transport.
Pinwheel Pattern
Space optimizationMix pallet orientations within the same layer, creating a pinwheel or windmill configuration. Maximizes floor space utilization.
Block-and-Fill
Mixed cargoLoad large items as blocks first, then fill remaining gaps with smaller items. Requires careful planning but handles irregular cargo well.
Pallet Capacity Reference
Cargo Securing Techniques
Properly secured cargo prevents damage, reduces liability, and ensures safe delivery. Learn the essential techniques for different cargo types.
Lashing & Tie-Downs
Use straps, ropes, or chains attached to container anchor points to secure cargo. Essential for heavy items and preventing forward/backward movement.
- Diagonal lashing: 45° angle straps prevent multi-directional movement
- Loop lashing: Over-the-top straps for tall or irregular loads
- Direct tie-down: Straight vertical straps for palletized cargo
Blocking & Bracing
Use lumber, airbags, or foam to fill gaps and prevent cargo from shifting. Critical for void spaces and mixed loads.
- Timber blocking: Lumber wedges against walls for heavy machinery
- Dunnage airbags: Inflatable bags fill voids between cargo rows
- Void fillers: Cardboard, foam, or honeycomb panels for smaller gaps
Dunnage Materials
Materials placed under and around cargo to protect from damage, moisture, and contamination.
- Plywood sheets: Spread weight, protect floors, create stable base
- Cardboard layers: Cushioning between stacked pallets
- Desiccant bags: Absorb moisture for ocean shipments
Wrapping & Protection
Additional protective measures for sensitive cargo and environmental protection during transit.
- Stretch wrap: Bind pallet loads, waterproof protection
- VCI paper: Anti-corrosion for metal parts
- Thermal blankets: Temperature control for sensitive goods
Common Container Loading Mistakes
Avoid these frequent errors that lead to cargo damage, shipping delays, and additional costs.
Exceeding Weight Limits
Overloaded containers face port rejection, fines, and safety hazards. Remember that road limits are often lower than container max payload.
Poor Weight Distribution
Uneven loading causes container tipping, chassis damage, and accidents. Concentrated weight damages container floors.
Inadequate Cargo Securing
Unsecured cargo shifts during transport, damaging goods and creating safety hazards. Void spaces allow movement.
Ignoring Stacking Limits
Stacking fragile or non-stackable cargo causes crushing damage. Heavy items on light ones collapse the load.
No Moisture Protection
Container rain (condensation) damages cargo during ocean transit. Temperature changes cause moisture buildup inside containers.
Wrong Container Size
Using a container that's too small means splitting cargo; too large wastes money. Tall cargo in standard containers gets damaged.
Pre-Loading Checklist
Frequently Asked Questions
What is a container load calculator?
A container load calculator helps you determine how your cargo fits inside shipping containers. It calculates volume utilization, weight distribution, and recommends optimal container sizes (20ft, 40ft, or 40ft High Cube) based on your cargo dimensions and weight.
What are the standard shipping container sizes?
The three most common container sizes are:
- 20ft Standard: 5.9m x 2.35m x 2.39m internal, 33.2 CBM capacity, 28,200 kg max payload
- 40ft Standard: 12.03m x 2.35m x 2.39m internal, 67.7 CBM capacity, 26,680 kg max payload
- 40ft High Cube: 12.03m x 2.35m x 2.69m internal, 76.3 CBM capacity, 26,460 kg max payload
When should I use LCL vs FCL shipping?
LCL (Less than Container Load) is best when your cargo fills less than 30% of a container - you share space with other shippers and pay per CBM. FCL (Full Container Load) typically becomes more economical when your cargo exceeds 50% utilization, offering faster transit times, reduced handling, and better security.
How do I calculate CBM for my cargo?
CBM (Cubic Meter) is calculated by multiplying Length x Width x Height in meters. For example, a box measuring 100cm x 80cm x 60cm equals 1m x 0.8m x 0.6m = 0.48 CBM. Multiply by quantity for total volume. Our calculator handles this automatically - just enter dimensions in cm or inches.
Why is weight distribution important in container loading?
Proper weight distribution prevents container tipping during transport, ensures safe handling by cranes and trucks, and complies with international shipping regulations. Weight should be evenly distributed front-to-back and side-to-side, with heavier items placed at the bottom. Our calculator analyzes weight distribution and warns you of imbalances.
What is container utilization and why does it matter?
Container utilization is the percentage of available space used by your cargo. Higher utilization (80%+) means better cost efficiency - you're paying for space, so using more of it reduces your per-unit shipping cost. Our calculator optimizes item placement to maximize utilization while respecting weight limits and stacking constraints.
Can I ship items that don't fit in a single container?
Yes! Our calculator automatically detects when cargo exceeds a single container's capacity and splits it across multiple containers. It optimizes the container mix - for example, using one 40ft High Cube and one 20ft Standard - to minimize costs while fitting all your cargo.
Need Help?
Not sure about container sizes or how to measure your cargo? Our experts are here to help you optimize your shipment.
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