1. What is Dimensional Weight?

Definition: Dimensional weight (also called volumetric weight) is a pricing technique for commercial freight transport that uses the estimated volume of a package to calculate its shipping cost.

Purpose: Carriers use dimensional weight to account for lightweight packages that take up significant space in their vehicles.

2. How Does the Calculator Work?

The calculator uses the FedEx dimensional weight formula:

Where:

• \( L \) — Length of package (inches)
• \( W \) — Width of package (inches)
• \( H \) — Height of package (inches)
• 139 — FedEx dimensional factor (domestic shipments)

Explanation: The package dimensions are multiplied together to get cubic inches, then divided by the dimensional factor to get the dimensional weight in pounds.

3. Importance of Dimensional Weight Calculation

Details: FedEx charges based on whichever is greater between the actual weight and dimensional weight. Calculating this helps estimate shipping costs accurately.

4. Using the Calculator

Tips: Measure your package at its longest points (including any bulges or protrusions) and enter the dimensions in inches. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why does FedEx use dimensional weight?
A: To account for lightweight packages that occupy valuable space in their trucks and planes.

Q2: Is the dimensional factor always 139?
A: For domestic FedEx shipments, yes. International shipments may use different factors (like 166 for some services).

Q3: How do I measure package dimensions correctly?
A: Measure to the nearest inch, rounding up. Include all packaging and protrusions in your measurements.

Q4: What if my package is irregularly shaped?
A: Use the longest dimension in each direction (length, width, height).

Q5: How does this compare to actual weight?
A: FedEx will charge based on whichever is greater - the actual weight or dimensional weight.