Freight & NMFC Knowledge Base
Plain-English guides to NMFC classification, freight class, and LTL shipping - everything you need to classify and price freight correctly.
Guides18
Guide 01
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The Complete Guide to LTL Freight Classification
The complete guide to LTL freight classification: NMFC codes, the 18 freight classes, how density sets your class, and how to avoid reclassification fees.
Guide 02
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What is NMFC? A Complete Guide to Freight Classification
NMFC (National Motor Freight Classification) is the standard system for classifying LTL freight into 18 classes. Learn what NMFC codes are and how they work.
Guide 03
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Freight Class Explained: All 18 NMFC Classes
A complete reference to all 18 LTL freight classes (50 to 500), the density ranges that determine them, and how to read the freight class chart.
Guide 04
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How to Determine Freight Class: A Step-by-Step Guide
Learn how to determine the freight class of your LTL shipment in three steps: measure dimensions, calculate density, and match to the NMFC class chart.
Guide 05
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How LTL Shipping Works: A Beginner’s Guide
LTL (less-than-truckload) shipping lets multiple shippers share one trailer. Learn how LTL works, how freight class sets the price, and when to use it.
Guide 06
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How to Calculate Freight Density for LTL Shipping
Step-by-step guide to LTL freight density: the formula, how to measure a pallet, the density-to-class table, and worked examples. Free calculator included.
Guide 07
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How to Find Your NMFC Code
How to find the NMFC code and freight class for what you ship: four reliable methods, how to read a sub-provision, common mistakes, and NMFC lookup for Pro and Enterprise users.
Guide 08
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Freight Class vs. NMFC Code: What's the Difference?
Freight class and NMFC code are not the same. The NMFC item number identifies your commodity; the class (50–500) prices it. Learn how they differ and relate.
Guide 09
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LTL vs FTL Shipping: What’s the Difference?
LTL vs FTL shipping compared: LTL shares a trailer and is priced by freight class; FTL books the whole truck. See when each wins on cost and speed.
Guide 10
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What Is an LTL Terminal (Service Center)? A Shipper’s Guide
An LTL terminal is a cross-dock where freight is unloaded, sorted, and reloaded. Learn how terminals work and how to look them up by state or ZIP.
Guide 11
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LTL Accessorial Charges Explained: A Shipper’s Guide
LTL accessorial charges are fees beyond base linehaul: liftgate, residential, detention, and more. Learn what triggers each and how to avoid them.
Guide 12
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Freight Reclassification and Carrier Inspections
What freight reclassification is, why carriers inspect and re-rate LTL shipments, what rebills cost, how to avoid them, and how to dispute a reclass.
Guide 13
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NMFC Code for Furniture: Freight Class & Lookup
What is the NMFC code for furniture? Furniture ships across freight classes 70–400. Learn how it's classified and find the exact NMFC item and class.
Guide 14
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NMFC Code for Tires: Freight Class & Lookup
What is the NMFC code for tires? Tires ships across freight classes 50–85. Learn how it's classified and find the exact NMFC item and class.
Guide 15
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NMFC Code for Auto Parts: Freight Class & Lookup
What is the NMFC code for auto parts? Auto Parts ships across freight classes 60–250. Learn how it's classified and find the exact NMFC item and class.
Guide 16
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NMFC Code for Electronics: Freight Class & Lookup
What is the NMFC code for electronics? Electronics ships across freight classes 85–250. Learn how it's classified and find the exact NMFC item and class.
Guide 17
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NMFC Code for Machinery: Freight Class & Lookup
What is the NMFC code for machinery? Machinery ships across freight classes 60–125. Learn how it's classified and find the exact NMFC item and class.
Guide 18
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NMFC Code for Steel: Freight Class & Lookup
What is the NMFC code for steel? Steel ships across freight classes 50–70. Learn how it's classified and find the exact NMFC item and class.
Freight class reference (50–500)18 classes
A guide to every NMFC freight class - its density range, example commodities, and cost. Tap a class:
Automate classification
Look up NMFC codes and freight class programmatically with the FreightAPIs NMFC API.