Instant Freight Systems Inc. Density Calculator
Instant Freight Systems Inc.

Shipment Density Calculator

Determine freight density and dimensional weight for air, ocean, and domestic ground shipments. Supports non-palletized, palletized, cylindrical, and volumetric weight calculations.

Non-Palletized Freight Density

Enter each piece type with its quantity, gross weight per piece, and outside dimensions (L × W × H including packaging). Add rows for different piece sizes. Results reflect the combined shipment.

# Pcs Gross Wt Length Width Height

Results

Volume
Density
Density indicator

How to measure non-palletized freight

Measure outside dimensions including all packaging.
Enter each distinct piece size as a separate row — the calculator multiplies per-piece volume by quantity and sums across all rows.

Example: 3 boxes at 25 × 24 × 23 in / 30 lbs each  +  1 crate at 40 × 36 × 30 in / 120 lbs

  1. Box volume: 25 × 24 × 23 ÷ 1,728 = 7.986 ft³ × 3 = 23.96 ft³
  2. Crate volume: 40 × 36 × 30 ÷ 1,728 = 25.00 ft³
  3. Total volume = 23.96 + 25.00 = 48.96 ft³
  4. Total weight = (3 × 30) + 120 = 210 lbs
  5. Density = 210 ÷ 48.96 = 4.29 lbs/ft³

In metric: (L cm × W cm × H cm) ÷ 1,000,000 = m³  →  total weight (kg) ÷ total volume (m³) = kg/m³

Palletized Freight Density

Combine the pallet dimensions with the shipment. Enter the pallet height and freight height separately — they are added together for the total height calculation.

Results

Total Height
Volume
Density
Density indicator

How to measure palletized freight

Example: Pallet 46 in × 42 in × 6 in high, freight 23 in tall, total weight 120 lbs

  1. Total height = 6 + 23 = 29 inches
  2. 46 × 42 × 29 = 56,028 cubic inches
  3. 56,028 ÷ 1,728 = 32.42 cubic feet
  4. 120 lbs ÷ 32.42 ft³ = 3.70 lbs/ft³ density

Include the weight of the pallet itself (typically 30–40 lbs for a standard wood pallet).

Cylindrical Freight Density

For cylindrical or non-rectangular cargo, use the greatest cross-sectional dimension (diameter or widest point) squared, multiplied by the height or length. This is the industry-standard bounding-box method for freight classification.

Results

Volume
Density
Density indicator

How to measure cylindrical freight

Multiply the greatest dimension by itself, then multiply by the height or length. Divide by 1,728 to convert to cubic feet (or by 1,000,000 for m³).

  1. Example: Greatest dimension 24 in, Height 36 in, Weight 75 lbs
  2. 24 × 24 × 36 = 20,736 cubic inches
  3. 20,736 ÷ 1,728 = 12.00 cubic feet
  4. 75 lbs ÷ 12.00 ft³ = 6.25 lbs/ft³ density

Volumetric (Dimensional) Weight

Air carriers charge based on whichever is greater: the actual weight or the dimensional weight. Enter your package dimensions and actual weight to find your chargeable weight.

Results

Actual Weight
Dimensional Weight
Chargeable Weight

How volumetric weight is calculated

Metric (cm / kg): L × W × H ÷ 6,000 = dimensional weight in kg

Imperial (in / lbs): L × W × H ÷ 139 = dimensional weight in lbs

The chargeable weight is the higher of actual weight vs. dimensional weight. The factor 6,000 is the IATA industry standard — some carriers may use 5,000.

  1. Example: 60 cm × 50 cm × 40 cm, Actual weight 8 kg
  2. 60 × 50 × 40 ÷ 6,000 = 20 kg dimensional weight
  3. Chargeable weight = 20 kg (dimensional exceeds actual)

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