Freight & NMFC Knowledge Base
Plain-English guides to NMFC classification, freight class, and LTL shipping - everything you need to classify and price freight correctly.
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, how they work, and why they matter.
Read guide →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.
Read guide →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.
Read guide →What is Freight Class 70? Density, Examples & Cost
Freight class 70 covers freight with a density of 15 to 22.5 lbs per cubic foot. Learn what ships as class 70, how it is rated, and how to confirm the class.
Read guide →What is Freight Class 100? Density, Examples & Cost
Freight class 100 covers freight with a density of 9 to 10.5 lbs per cubic foot. Learn what ships as class 100, how it is rated, and how to confirm the class.
Read guide →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 and NMFC codes set the price, and when to use it.
Read guide →Automate classification
Look up NMFC codes and freight class programmatically with the FreightAPIs NMFC API.