Choose shipment pieces
Use Same size / weight for one or multiple identical pieces. Use Different sizes / weights when multiple pieces have different dimensions or weights.
Free LTL Freight Density Calculator
Single + Multi-Piece Shipments
Freight Density Calculator
Freight density measures how much packaged shipment weight occupies each cubic foot of space.
How to Use the Calculator
How to use
How to Calculate Freight Density
Freight density is calculated in pounds per cubic foot (lb/ft³), also called PCF. PCF can be calculated for single or multiple pieces, including shipments with different sizes and weights.
Enter packaged details
Measure the full outside size, including pallet, skid, crate, carton, wrap, and overhang.
Review and transfer
Check cubic feet, total weight, and freight density, then transfer the shipment to the Freight Class Calculator when needed.
Result interpretation
What Your Freight Density Result Means
Freight density tells you how much packaged shipment weight occupies each cubic foot. A higher or lower number is not a quality score—it simply describes how tightly the shipment's weight is packed into its measured volume.
Higher density
More weight is packed into each cubic foot. If weight stays the same while packaged volume decreases, density rises.
Lower density
The same weight occupies more cubic space. If packaged volume increases while weight stays the same, density falls.
Density and class
Freight Class Chart: Current 13-Tier Density Scale
After calculating pounds per cubic foot, compare your result with the current density-based freight class ranges. Higher-density freight generally falls toward lower-numbered classes, while lower-density freight generally falls toward higher-numbered classes.
Compare all 13 current density ranges with estimated freight classes and representative packaged shipment examples. Download the freight class chart PDF or share the chart directly.
Density-based class is an estimate.
Need commodity-specific guidance? Search 200+ commodity classes with examples and packaging guidance on the Freight Class Lookup Tool.
Freight Density Scale and Class Boundaries
Compare neighboring density ranges to see exactly where one density-based freight class ends and the next begins.
| Density, lb/ft³ | Density-based estimate |
|---|---|
| 12 to under 15 | Freight Class 85 |
| 15 to under 22.5 | Freight Class 70 |
| 22.5 to under 30 | Freight Class 65 |
Need to look up the new 13-tier density ranges chart? See the Freight Class Chart
Near-threshold example
Small Measurement Changes Can Cross a Density Boundary
A 48 × 40 × 40 inch shipment weighing 640 lb occupies 44.44 ft³ and has a density of 14.40 lb/ft³, just below the 15 lb/ft³ boundary.
If the finished height is actually 38 inches at the same weight, volume drops to 42.22 ft³ and density rises to about 15.16 lb/ft³. That moves the density-based estimate from the Class 85 range into the Class 70 range.
The point is measurement accuracy—not changing packaging to target a class. Final freight classification can depend on factors beyond density.
Measurement accuracy
Measurement Mistakes That Change Freight Density
Freight density changes when shipment size or weight changes. Small measurement errors in finished height, overhang, wrapping, crate size, or packaged weight can shift the pounds-per-cubic-foot result.
Measure the finished shipment, not only the product
Use the complete outside packaged dimensions. Include the pallet, skid, crate, carton, wrap, corner protection, and anything else that increases the occupied space.
Include overhang and packaging bulge
If freight extends beyond its base or packaging bows outward, use the widest and longest finished outside points rather than a nominal pallet or carton size.
Use maximum outside dimensions for irregular freight
Measure the maximum outside length, width, and height—the smallest rectangular space that fully contains the packaged shipment.
Use finished packaged weight
Density uses the shipment weight that goes with those finished dimensions. For multiple item groups, use the packaged weight for each group so the totals match the measured volume.
Calculator Formulas
Freight Density Formula and Calculation
This tool calculates freight density from the full packaged shipment size. The calculator converts units when needed, calculates cubic feet, totals the shipment weight, and then divides total pounds by total cubic feet.
Freight Density Formula
Density=
Weight (lb)
Volume (ft³)
Freight density is total packaged shipment weight divided by total cubic feet. The result is expressed in lb/ft³ or PCF.
How to Calculate Cubic Feet for Freight
Volume=
L × W × H
1,728
When dimensions are measured in inches, multiply length × width × height and divide by 1,728 to convert cubic inches to cubic feet.
How to Calculate Freight Density Step by Step
- Measure the finished outside length, width, and height of the packaged freight.
- Multiply length × width × height to calculate cubic inches.
-
Divide cubic inches by 1,728 to convert the shipment volume to cubic feet.
- Divide total packaged weight by total cubic feet to calculate freight density in lb/ft³ (PCF).
Multiple identical pieces: multiply the cubic feet of one piece by Quantity.
CALCULATION EXAMPLE
Freight Density Calculation Example
A packaged handling unit measuring 48 × 40 × 36 inches has 40.00 cubic feet of volume. At 400 lb, its freight density is 10.00 lb/ft³.
MULTI-ITEM DENSITY
Freight Density for Multiple Pieces with Different Sizes and Weights
For different item groups, add their volume and weight totals, then divide combined weight by combined cubic feet.
Item Group 1
2 × 48 × 40 × 36 in
400 lb each · 80.00 ft³ · 800 lb total
Item Group 2
1 × 48 × 48 × 48 in
600 lb · 64.00 ft³
Combined Result
1,400 lb ÷ 144.00 ft³
9.72 lb/ft³
PACKAGING CHANGES
See How Packaging Changes Freight Density
These examples keep shipment weight the same while reducing packaged height or pallet overhang. When the finished cube gets smaller, the same weight occupies fewer cubic feet and freight density rises.
Reduced Pallet Height
The same 300 lb shipment occupies less vertical space.
Before
48 × 40 × 36 in · 40.00 ft³
7.50 lb/ft³
4 inches lower ↓
After
48 × 40 × 32 in · 35.56 ft³
8.44 lb/ft³
Density increased 12.5%
Removed Pallet Overhang
A smaller outside footprint raises density.
Before
52 × 44 × 40 in · 52.96 ft³
13.22 lb/ft³
Footprint reduced ↓
After
48 × 40 × 40 in · 44.44 ft³
15.75 lb/ft³
Density increased 19.2%
Compact Crate Profile
Reducing crate height packs the same weight into less cubic space.
Before
60 × 48 × 48 in · 80.00 ft³
20.00 lb/ft³
8 inches lower ↓
After
60 × 48 × 40 in · 66.67 ft³
24.00 lb/ft³
Density increased 20.0%
Working with palletized freight? Use the Pallet Freight Calculator to calculate pallet density and freight class.
Freight Planning Calculators
Calculate and Plan Your LTL Shipment
Use the freight class, density, pallet, and linear-feet tools together to plan packaged LTL freight.
Freight Class Calculator
Estimate freight class from packaged dimensions, weight, and density.
Freight Density Calculator
Current toolCalculate cubic feet and pounds per cubic foot.
Pallet Freight Calculator
Plan pallet dimensions, shipment weight, density, and configuration.
Freight Linear Feet Calculator
Estimate trailer-space usage for packaged freight.
Freight Class Lookup
Freight Class Lookup by Commodity
After calculating density, explore shipment examples, packaging considerations, and calculator guidance for common freight categories.
Machinery Freight Class
Skidded, crated, irregular, and oversized machinery shipments.
Machine Parts Freight Class
Packaging and density considerations for machine components.
Engines Freight Class
Crated, palletized, and protected engine shipments.
Cabinets Freight Class
Cabinet construction, packaging, and shipment-density examples.
Electronics Freight Class
Packaged electronics, equipment, and handling considerations.
Furniture Freight Class
Palletized, boxed, assembled, and flat-packed furniture.
Freight Class Lookup
Browse freight class pages for machinery, electronics, furniture, food, packaging, hose, and auto parts.
Visual guide
Visual References
View these supporting visuals when you want a quick look at the calculator interface, its output, or the formulas behind the density result.
Tap for full size
