CargoPro (装箱小子) is a professional container and pallet loading calculator with fragile/stacking rules, custom sizes, 3D preview, PDF export and cloud backup without login.

Which platforms does CargoPro support?

CargoPro supports iPhone, iPad and Android via the App Store and Google Play.

What is the difference between Free and Pro?

The free version offers full loading experience with limits on plan count and custom sizes. Pro is a one-time purchase that unlocks all features.

What does the trade calculator do?

The trade terms calculator supports EXW, FCA, FOB, CIF and DDP, including exchange rate, VAT, rebate, freight, insurance, duty and last-mile costs.

CargoPro - Container Loading Calculator | Pallet Loading

Algorithm

3D packing is a combinatorial optimization problem. CargoPro uses a greedy heuristic: sort first, then place item by item under constraints for a fast usable plan.

Goal: raise space utilization

With a fixed container volume, pack as much cargo volume as possible.

η = Σ Vᵢ / V_bin ， Vᵢ = lᵢ · wᵢ · hᵢ

The closer η is to 1, the better. Weight and stacking constraints still apply.

Feasibility: the box must fit

The candidate free space must fit the item (use a feasible orientation if rotation is allowed).

lᵢ ≤ L' ∧ wᵢ ≤ W' ∧ hᵢ ≤ H'

L', W', H' are candidate cavity sizes; otherwise try the next position.

Greedy: pick the best move now

A typical approach is largest-first (FFD-style), score each cavity, and place at the best score.

choose argmax score(slot), e.g. score = −leftover void

It only optimizes the current step and rarely backtracks, so it stays fast.

Limit: local optimum ≠ global optimum

An early “better-looking” placement may block a larger item later
Sort order and score weights can change results a lot
On extreme mixed loads, short greedy runs may lose to longer search

Greedy packing demo

Preparing

Queued cargo Selected Packed Free space

Feature Overview

From container & cargo rules, to preview and import/export, plus cloud backup without login — at a glance.

🚛

Loading & containers

Supports pallet and non-pallet loading plans
Create any size containers and pallets
Supports by container volume loading without counting individual pieces

📐

Cargo rules & placement

Supports fragile items and max stack layers settings
Supports load-bearing faces settings
Per item type, set its own max stack layers
Heavier items first go on lower layers

🔢

Quantity & kits

Flexible quantities for changing cargo volumes
Per set ratios loading (kits or bundled sets)

👁️

Preview & optimization

Visual preview of every loading result
Smart algorithms optimize placement to raise utilization

📄

Import & export

Batch-import from text cargo
Export plans as PDF

☁️

Data & usage

Automatically back up to the cloud
No login needed for core features

Easy to use, flexible & efficient

Enter cargo, container and pallet data to generate a plan. Batch text import, PDF export and 3D preview help you verify the load quickly.

Tune fragile, bearing-face, stack-layer and heavy-bottom rules. Sync to the cloud — no account required.

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Latest Wiki Articles

tech

Screenshots & demo

CargoPro app screenshots

Subscription

🆓

Free

Try full loading plans with limits on plan count and custom features.

💎

Pro

One-time purchase unlocks all features with no limits.

This app includes in-app purchases. One-time payment unlocks all features.

CargoPro