LTL Freight Class Density Calculator

Density Formula:

\[ \rho = \frac{W}{\frac{L \times W \times H}{1728}} \]

Weight:

pounds (lb)

Length:

inches (in)

Width:

inches (in)

Height:

inches (in)

Density (lb/ft³):

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1. What is an LTL Freight Class Density Calculator?

Definition: This calculator determines the density of a shipment for Less-Than-Truckload (LTL) freight classification.

Purpose: It helps shippers and logistics professionals calculate freight density which is a key factor in determining freight class and shipping costs.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ \rho = \frac{W}{\frac{L \times W \times H}{1728}} \]

Where:

\( \rho \) — Density (pounds per cubic foot)
\( W \) — Weight of shipment (pounds)
\( L \) — Length of shipment (inches)
\( W \) — Width of shipment (inches)
\( H \) — Height of shipment (inches)
1728 — Conversion factor (cubic inches to cubic feet)

Explanation: The formula converts the shipment dimensions from cubic inches to cubic feet, then divides the weight by this volume to get density.

3. Importance of Freight Density Calculation

Details: Freight density is a primary factor in determining LTL freight class, which affects shipping rates. Higher density shipments generally qualify for lower freight classes and lower rates.

4. Using the Calculator

Tips: Enter the shipment weight in pounds and dimensions in inches. Measure at the longest points and include packaging. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why is 1728 used in the formula?
A: 1728 converts cubic inches to cubic feet (12 inches × 12 inches × 12 inches = 1728 cubic inches per cubic foot).

Q2: How does density affect freight class?
A: Generally, higher density shipments qualify for lower freight classes (e.g., 50+ lb/ft³ = Class 50, 12-15 lb/ft³ = Class 150).

Q3: Should I measure with or without packaging?
A: Always include packaging in your measurements as carriers charge based on the space your shipment occupies in their trailer.

Q4: What if my shipment has multiple pieces?
A: Calculate total weight and sum the volume of all pieces (L×W×H for each piece, then add them together).

Q5: How accurate does this need to be?
A: Very accurate. Carriers may re-weigh and re-measure shipments, and incorrect classifications can result in additional charges.