Container Capacity Calculations
How many pallets or boxes fit in a container?
Use these free calculators to answer common questions like “How many pallets fit in a 40ft container?” or “How many boxes fit in a 45ft High Cube?”. Each page includes a pre-filled example you can adjust.
Choose a calculation
These calculators focus on the most common search questions by combining standard container sizes (20ft, 40ft, 40ft High Cube, 45ft High Cube) with typical pallet and box sizes. Results are based on simple length × width × height math — ideal for quick planning before you run a full 3D load optimization in JustLoad.it.
Pallets
How many pallets fit in a 20ft container?
Pre-filled example for a standard pallet in a 20ft container.
Pallets
How many pallets fit in a 40ft container?
Pre-filled example for a standard pallet in a 40ft container.
Pallets
How many pallets fit in a 40ft High Cube?
Pre-filled example for a standard pallet in a 40ft high cube.
Pallets
How many pallets fit in a 45ft High Cube?
Pre-filled example for a standard pallet in a 45ft high cube.
Boxes
How many boxes fit in a 20ft container?
Pre-filled example for a typical box in a 20ft container.
Boxes
How many boxes fit in a 40ft container?
Pre-filled example for a typical box in a 40ft container.
Boxes
How many boxes fit in a 40ft High Cube?
Pre-filled example for a typical box in a 40ft high cube.
Boxes
How many boxes fit in a 45ft High Cube?
Pre-filled example for a typical box in a 45ft high cube.
Math-based estimate vs. full 3D optimization
These calculators intentionally use a simple mathematical model: we treat your cargo as perfectly stackable boxes and calculate how many fit inside the internal footprint and height of the container. That makes the answer fast, transparent, and easy to understand.
In production, JustLoad.it goes further with a real 3D packing algorithm that considers mixed item sizes, stacking rules, weight distribution, and more. Use these calculators for quick estimates, then upgrade to a full plan when you're ready to generate detailed 3D loading plans.
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Box & Carton Loading
Maximize container space when shipping boxes and cartons. Handle multiple SKUs, different box sizes, and create efficient loading sequences for warehouse teams.
Mixed Cargo Loading
Efficiently load containers with diverse cargo types. Combine pallets, boxes, crates, and irregularly shaped items while maximizing space utilization.
Turn rough estimates into precise 3D loading plans
Sign up for JustLoad.it to run full 3D optimizations, save load plans, and share clear instructions with your warehouse team.