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ShipCalc.cn
ISO 668 Container Standards

Container Loading Simulator & Capacity Matrix

Simulate carton stuffing into 20' GP, 40' GP, 40' HQ, and 45' HQ ISO ocean shipping containers. Incorporates realistic packing efficiency — 85% for floor-loaded cartons and 78% for palletized cargo — and checks container max weight payload limits.

20GP: 33.2 m³ / 28t Payload40GP: 67.6 m³ / 26.5t Payload40HQ: 76.2 m³ / 26.5t Payload
3D container load simulation and packing optimization visualization
ISO 668 3D Container Stuffing Simulation

ISO Container Loading Simulator

Simulate carton packing capacity into 20ft, 40ft, 40HQ, and 45HQ standard shipping containers.

Length
Width
Height
Container Dimensions: 1203cm (L) × 235cm (W) × 269cm (H) · Total Internal Volume: 76.2 m³
Loading Simulation Results85% Packing Factor
Realistic Loading Capacity737 ctnsTheoretical Max (100% Solid): 868
Total Cargo Weight10,318 kgMax Limit: 26,500 kg
Volume Utilization (64.7 / 76.2 m³)84.9%
✓Safe (Within payload limits)

Why Theoretical CBM Differs From Real Container Loadability

Many shipping calculators simply divide container volume by carton volume (e.g. 76.2 m³ ÷ 0.08 m³ = 952 cartons). In real-world port operations, this theoretical calculation is unrealistic because:

1. Geometric Edge Loss

Carton dimensions rarely divide evenly into container length (5.89m / 12.03m), width (2.35m), and height (2.39m / 2.69m). Leftover voids cannot fit whole cartons.

2. Door Header Clearances

The container door header is lower than interior ceiling (2.58m door opening on a 2.69m 40HQ). Workers cannot stack flush against rear doors without blocking latches.

3. Palletization & Dunnage

If goods are loaded on standard wooden pallets (1200×1000mm or 1200×800mm EUR), pallet tare height and gaps reduce cubic utilization down to ~72–78%.