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Freight Class Calculator 2025

Determine NMFC freight class based on density

Shipment Dimensions

NMFC Freight Class Reference

Class Density (lbs/ft³) Example Items
Class 50 >50 Durable items, > 50 lbs/ft³, e.g., steel, bolts, nuts
Class 55 35-50 35-50 lbs/ft³, e.g., bricks, cement, hardwood flooring
Class 60 30-35 30-35 lbs/ft³, e.g., car accessories, ceramic tiles
Class 65 22.5-30 22.5-30 lbs/ft³, e.g., boxed books, beverages
Class 70 15-22.5 15-22.5 lbs/ft³, e.g., car parts, food items
Class 77.5 13.5-15 13.5-15 lbs/ft³, e.g., tires, bathroom fixtures
Class 85 12-13.5 12-13.5 lbs/ft³, e.g., crated machinery, transmission
Class 92.5 10.5-12 10.5-12 lbs/ft³, e.g., computers, monitors
Class 100 9-10.5 9-10.5 lbs/ft³, e.g., boat covers, wine cases
Class 110 8-9 8-9 lbs/ft³, e.g., cabinets, framed artwork
Class 125 7-8 7-8 lbs/ft³, e.g., small appliances
Class 150 6-7 6-7 lbs/ft³, e.g., auto sheet metal
Class 175 5-6 5-6 lbs/ft³, e.g., clothing, stuffed furniture
Class 200 4-5 4-5 lbs/ft³, e.g., aircraft parts, aluminum sheets
Class 250 3-4 3-4 lbs/ft³, e.g., mattresses, bamboo
Class 300 2-3 2-3 lbs/ft³, e.g., wood cabinets, tables
Class 400 1-2 1-2 lbs/ft³, e.g., deer antlers
Class 500 0-1 < 1 lb/ft³, e.g., bags of gold dust, ping pong balls
Freight Class
Class 70

Shipment Details

Volume 0 ft³
Weight 0 lbs
Density 0 lbs/ft³

Car Parts

15-22.5 lbs/ft³, e.g., car parts, food items

How to Use This Calculator

  1. 1

    Measure the Length, Width, and Height of your pallet/shipment in inches.

  2. 2

    Weigh the shipment in pounds.

  3. 3

    Enter these values into the calculator.

  4. 4

    The tool will calculate Density (lbs/ft³) and determine the estimated NMFC Class.

Frequently Asked Questions

What determines Freight Class?
Freight Class is determined primarily by the density of the shipment (lbs per cubic foot), but also by stowability, handling ease, and liability. The NMFC system uses classes ranging from 50 (dense, durable) to 500 (light, fragile).
How do I calculate density?
Density is calculated by dividing the weight of the shipment in pounds by its volume in cubic feet. formula: Density = Weight (lbs) / (Length x Width x Height (in inches) / 1728).
Why is my freight class important?
Your freight class directly dictates your shipping cost. Misdeclaring it can lead to re-classification fees from the carrier.