DimPack3D is a free online 3D packaging calculator designed for e-commerce sellers, Amazon FBA sellers, and freight forwarders. It helps you calculate optimal product-to-carton packing, container loading, CBM (cubic meters), and Amazon FBA size tiers with interactive 3D visualization.

How do I calculate CBM (Cubic Meters)?

To calculate CBM, enter your carton dimensions (length, width, height) in centimeters. DimPack3D automatically converts to cubic meters using the formula: CBM = (Length × Width × Height) / 1,000,000. The calculator also shows total CBM for multiple cartons in your shipment.

What are Amazon FBA size tiers?

Amazon FBA size tiers determine fulfillment fees based on product dimensions and weight. Tiers include Small Standard, Large Standard, Large Bulky, and Extra-Large. DimPack3D uses the 2025 Amazon FBA standards to classify your products and estimate fees.

How many boxes can fit in a 40-foot container?

The number of boxes depends on your carton dimensions. A 40GP container has internal dimensions of approximately 1203 × 235 × 239 cm (67.5 CBM). DimPack3D's container loading calculator optimizes placement and shows exactly how many cartons fit with 3D visualization.

Is DimPack3D free to use?

Yes, DimPack3D is completely free with no registration required. All features including 3D visualization, packing calculator, container loading, and FBA size tier calculations are available at no cost. Your data is saved locally in your browser.

What is dimensional weight and how is it calculated?

Dimensional weight (DIM weight) is a pricing technique for freight that considers package size. It's calculated by multiplying Length × Width × Height and dividing by a DIM factor (typically 5000 for air freight, 6000 for sea freight). Carriers charge the greater of actual weight or dimensional weight.

What is a good container utilization rate?

A good container utilization rate is 80-90%. While 100% might seem ideal, leaving 10-15% space allows for easier loading/unloading and reduces cargo damage risk. Professional loaders typically target 85% as the sweet spot.

How do I calculate container loading efficiency?

Container loading efficiency = (Total cargo CBM ÷ Container capacity CBM) × 100%. For example, 25 CBM cargo in a 33 CBM 20GP container = 75.8% utilization. Consider both volume and weight limits.

What is the best stacking pattern for containers?

The best stacking pattern depends on carton dimensions. Common patterns include: Block stacking (same-size cartons), Brick pattern (offset layers for stability), and Column stacking (heavy items on bottom). Always place heavier cartons at the bottom and near the container doors.

How do I prevent cargo damage during shipping?

Prevent cargo damage by: 1) Distributing weight evenly, 2) Using dunnage and void fillers, 3) Securing cargo with straps or nets, 4) Not exceeding stacking limits, 5) Leaving ventilation gaps if needed, 6) Using moisture absorbers for long voyages.

Container Loading Optimization: Maximize Space Utilization

1貨櫃規格對照

類型	內部尺寸	容量	載重
20GP	5.9m × 2.35m × 2.39m	33.2 CBM	28,000 kg
40GP	12.03m × 2.35m × 2.39m	67.7 CBM	26,000 kg
40HQ	12.03m × 2.35m × 2.69m	76.3 CBM	26,000 kg

選擇貨櫃的技巧

40HQ 比 40GP 高 30cm，額外增加約 9 CBM 空間。如果貨物高度超過 2.2m 或需要額外空間，40HQ 通常是更好的選擇。

2裝載模式

塊狀堆疊

適用於統一尺寸的紙箱。直接一層層向上堆疊，最大化垂直空間利用。

利用率可達 85-90%

磚塊模式

每層交錯擺放，增加穩定性。適合長途運輸或海運。

穩定性最佳

// 最佳裝載順序

1. 重物 → 底部，靠近門口

2. 中等重量 → 中間層

3. 輕物 → 頂部，最後裝載

3重量分佈

正確的重量分佈對於運輸安全至關重要。不平衡的載重可能導致貨櫃傾斜、貨物損壞，甚至運輸事故。

重要規則

• 重心應保持在貨櫃中心位置
• 前後重量差異不超過 60:40
• 左右兩側重量應平衡

4優化策略

1統一紙箱尺寸

使用 2-3 種標準紙箱尺寸，可以更容易規劃裝載方案，減少空隙。

2先計算再裝載

使用裝載計算器提前規劃方案，避免現場臨時調整浪費時間。

3善用空隙填充

使用氣墊袋、泡沫或紙板填充空隙，防止貨物在運輸中移動。

4目標 85% 利用率

85% 是理想的平衡點，既最大化空間利用，又保留足夠的操作空間。

5常見錯誤

✗超過紙箱的堆疊限制
✗重物放在頂部
✗忽略貨櫃載重限制
✗沒有固定貨物
✗追求 100% 裝載率而犧牲安全

6使用我們的計算器

使用我們的免費貨櫃裝載計算器，輸入紙箱尺寸即可自動計算最佳裝載方案和空間利用率。

立即使用貨櫃計算器

DimPack3D

貨櫃裝載優化：最大化空間利用率

目錄