Freight Class Calculator

Calculate the density of your shipment to determine its estimated NMFC Freight Class. Essential for avoiding LTL re-bills and billing adjustments.

Standard Density-to-Class Guide

Density (lbs per ft³)	Freight Class
Less than 1	400
1 but less than 2	300
2 but less than 4	250
4 but less than 6	150
6 but less than 8	125
8 but less than 10	100
10 but less than 12	92.5
12 but less than 15	85
15 but less than 22.5	70
22.5 but less than 30	65
30 but less than 35	60
35 but less than 50	55
50 or greater	50

*Note: This calculator uses standard density-based classification. Some commodities have specific NMFC codes regardless of density.

Related freight tools: Density directly impacts how much trailer space your freight occupies. Use the LTL Linear Foot Calculator to ensure your shipment doesn't trigger length penalties. If your freight is too large for standard LTL, estimate a volume quote using the Partial & Volume LTL Rate Calculator.

This tool was created by Ben Crittenden, an IT professional with experience in web development, systems administration, and project management.