---
title: How is Freight Class Calculated?
description: What is freight class, and how is it calculated at Mothership?
---

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# How is Freight Class Calculated?

## What is freight class, and how is it calculated at Mothership?

#### **Understanding Freight Class Calculation**

Freight class is a standardized system used in Less-than-Truckload (LTL) shipping to categorize shipments based on specific characteristics. It determines pricing and handling requirements for various types of freight. The classification system, established by the National Motor Freight Classification (NMFC), assigns a numerical class ranging from **50 to 500** based on four key factors:

#### **1. Density (Primary Factor)**

Freight class is largely determined by **density**, which is the weight of the shipment divided by its volume (measured in cubic feet). The higher the density, the lower the freight class, which typically results in lower shipping costs. Conversely, lower-density shipments take up more space and often cost more.

#### **2. Stowability**

This factor considers how easily freight can be stowed in a trailer. Freight that is difficult to stack or requires special handling (e.g., hazardous materials) may be assigned a higher class

#### **3. Handling**

Freight that is fragile, hazardous, or requires special equipment for loading and unloading may be placed in a higher class due to increased handling requirements.

#### **4. Liability**

This factor considers the value of the shipment and its risk of damage or theft. High-value goods are often classified at a higher freight class.

---

 

#### **Freight Class Calculation Table**

| **Density (lbs per cubic ft)** | **Freight Class** |
| --- | --- |
| 50 or more | 50 |
| 35 - 49 | 55 |
| 30 - 34 | 60 |
| 22.5 - 29 | 65 |
| 15 - 22.4 | 70 |
| 13.5 - 14.9 | 77.5 |
| 12 - 13.4 | 85 |
| 10.5 - 11.9 | 92.5 |
| 9 - 10.4 | 100 |
| 8 - 8.9 | 110 |
| 7 - 7.9 | 125 |
| 6 - 6.9 | 150 |
| 5 - 5.9 | 175 |
| 4 - 4.9 | 200 |
| 3 - 3.9 | 250 |
| 2 - 2.9 | 300 |
| 1 - 1.9 | 400 |
| Less than 1 | 500 |

By accurately entering your shipment’s weight and dimensions, you can ensure the correct freight class is applied, avoiding unnecessary reclassifications and charges.

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