What freight class is
LTL carriers price by class, a number from 50 to 500 that reflects how much space a shipment consumes relative to its weight. Low classes (50–85) are dense freight like machinery; high classes (200–500) are light and bulky like pillows. Get the class wrong and the carrier re-classes the shipment — with a fee.
Density is the main driver
Density = weight ÷ cubic feet. Above 50 lb/ft³ you are in class 50; below 1 lb/ft³ you are in class 500. The calculator maps density to the standard scale, which covers the majority of commodities where no special NMFC item applies.
When density is not enough
- Special handling: fragile, hazardous, or liability-prone goods carry a higher class
- Stackability: non-stackable freight is reclassified upward
- Packaging: small packages may qualify for lower classes
- NMFC item numbers override density for many specific commodities
Practical use
Use this to sanity-check a carrier quote or to compare packaging scenarios. For recurring LTL freight, get the class confirmed in writing by your carrier or a freight broker.
Frequently Asked Questions
What is a good freight class?
Lower is cheaper. Class 50–70 is dense freight; 200+ is light and bulky.
How is density calculated?
Weight in pounds divided by volume in cubic feet (L × W × H ÷ 1728 for inches).
Can I choose my own class?
You declare it, but the carrier can re-class and rebill if the shipment does not match.
Assumptions & disclaimer
Results are estimates for planning. Fee schedules, tax brackets and deduction limits change; confirm current figures with the marketplace, the IRS or a qualified accountant before making decisions. Nothing here is financial, tax or legal advice.
Privacy & Your Data
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