Freight Class Calculator 2026
Instantly determine your NMFC freight class, shipment density, and estimated LTL cost. Includes a multi-item pallet calculator, imperial/metric conversion, and NMFC commodity lookup. Used by 5,000+ ecommerce brands.
AMZ Prep's freight class calculator determines the National Motor Freight Classification (NMFC) class of a shipment based on its density. Enter weight and dimensions and the tool computes density in pounds per cubic foot, then maps it to one of 18 freight classes from Class 50 through Class 500. Use the Density Calculator for a single shipment, the Multi-Item Pallet tab for mixed pallets, and the Commodity Lookup to find typical NMFC codes by product type. Freight class directly affects LTL freight rates — lower density shipments receive higher class numbers and cost more to ship.
Freight Class & Density Calculator
Four tools in one. Calculate by density, look up an NMFC commodity code, combine multiple items on a pallet, or scan the full freight class reference chart.
Calculate Freight Class by Density
Enter your shipment dimensions and weight to determine the NMFC class.
Need freight shipping for your ecommerce business?
AMZ Prep rate shops 35+ carriers to beat typical LTL broker pricing. Most quotes delivered within 24 hours.
Get a Free Shipping Quote →NMFC Commodity Lookup
Some commodities have fixed freight classes regardless of density. Pick a category to find typical NMFC codes and classes.
Multi-Item Pallet Calculator
Calculate combined density for a pallet holding several different items.
NMFC Freight Class Reference Chart
All 18 classes with density ranges, cost impact, and common commodity examples.
| Class | Density Range (lbs/cu ft) | Example Products | Cost Impact |
|---|---|---|---|
| 50 | 50+ | Bricks, cement, floor loaded dense goods | Low |
| 55 | 35 to 50 | Lumber, sand, hardwood flooring | Low |
| 60 | 30 to 35 | Car accessories, bottled beverages | Low |
| 65 | 22.5 to 30 | Car parts, bottled water, books | Low |
| 70 | 15 to 22.5 | Food items, auto parts, machinery | Low |
| 77.5 | 13.5 to 15 | Tires, bathroom fixtures | Medium |
| 85 | 12 to 13.5 | Crated machinery, cast iron stoves | Medium |
| 92.5 | 10.5 to 12 | Computers, monitors, refrigerators | Medium |
| 100 | 9 to 10.5 | Boat covers, car covers, canvas | Medium |
| 110 | 8 to 9 | Cabinets, framed artwork, table saws | Medium |
| 125 | 7 to 8 | Small household appliances | High |
| 150 | 6 to 7 | Auto sheet metal, bookcases | High |
| 175 | 5 to 6 | Clothing, couches, stuffed furniture | High |
| 200 | 4 to 5 | Aluminum tables, auto sheet metal parts | High |
| 250 | 3 to 4 | Bamboo furniture, mattresses, plasma TVs | Very High |
| 300 | 2 to 3 | Wood cabinets, tables, chairs setup | Very High |
| 400 | 1 to 2 | Deer antlers, lightweight wood items | Very High |
| 500 | Less than 1 | Bags of gold dust, ping pong balls | Very High |
Everything in One Freight Class Calculator
AMZ Prep built this tool to cover every freight classification scenario an ecommerce brand runs into — from a single carton to a mixed pallet bound for an Amazon FC.
Density-Based Classification
Enter weight and dimensions to get an instant NMFC class from Class 50 to Class 500, with a live class preview as you type.
Imperial ↔ Metric Toggle
Switch between inches/pounds and centimeters/kilograms. The tool converts your entries automatically and recalculates in PCF.
Multi-Item Pallet Calculator
Add several item types with their own quantities and weights to get one combined density and freight class for the whole pallet.
NMFC Commodity Lookup
Search 10 product categories — electronics, furniture, food, auto parts and more — for typical NMFC codes and freight classes.
LTL Cost Estimation
Add a rate per CWT to estimate total LTL cost, plus cost per piece, per pound, and per cubic foot for quick margin checks.
Handling & Stowability Flags
Choose HazMat, fragile, refrigerated, or non-stackable and the results explain how each factor can change your class and surcharges.
Complete Class Reference
The full 18-class chart with density ranges, cost impact, and example products is built in — no need to leave the page.
Printable Result Summary
A full shipment breakdown — dimensions, density, linear feet, trailer usage, and class — that you can print or save as a PDF.
Built for Ecommerce & FBA
Presets and examples geared to palletized inventory and Amazon FBA inbound, so your class reflects how brands actually ship.
Get Accurate Results from the Freight Class Calculator
AMZ Prep ships thousands of LTL pallets per month. These six tips prevent reclassification fees and billing surprises.
Weigh After Packaging
AMZ Prep always weighs after boxing, wrapping, and palletizing. Include pallet weight in your total. A standard GMA pallet adds 40 to 48 lbs.
Measure at the Widest Points
AMZ Prep measures from the outermost edges, not the product alone. Overhang, bulging, or irregular shapes all count toward total dimensions.
Round Up, Not Down
Carriers round dimensions up when inspecting freight. AMZ Prep recommends entering rounded up values. This prevents reclassification and surprise fees.
Check Commodity Type
AMZ Prep verifies the NMFC commodity code in addition to density. Some items have fixed class assignments regardless of density. Use the Commodity Lookup tab.
Optimize Packaging Density
AMZ Prep helps brands reduce freight class by packing tighter. Eliminate air gaps, use smaller cartons, and stack more units per pallet to increase density.
Document Everything
AMZ Prep photographs and records every shipment before pickup. Documented weight and dimensions protect against carrier reclassification disputes.
How Freight Class Affects LTL Shipping Costs
AMZ Prep processes thousands of LTL freight shipments per month. Freight class is the primary pricing factor for every one of them. The NMFC system assigns each shipment to one of 18 classes based on density, stowability, handling, and liability.
Lower class numbers (Class 50) represent the densest freight and cost less per pound to transport. Higher class numbers (Class 500) represent lighter, bulkier items — carriers charge more because they take up trailer space without proportional weight.
For ecommerce brands shipping palletized inventory, accurate freight class prevents overpaying on every LTL freight shipment. A single class difference can shift costs by 15 to 30 percent on the same lane.
AMZ Prep's network of 35+ carrier partners rate shops to find the best price for your specific freight class. The calculator above gives you a starting point. AMZ Prep provides the exact rate.
How to Calculate Your Freight Class
AMZ Prep built this freight class calculator to give ecommerce brands a fast density based estimate. Follow these four steps.
Weigh Your Shipment
Weigh your shipment on a calibrated scale. Include packaging and pallets in the total weight.
Measure Dimensions
Measure length, width, and height in inches. Measure at the longest points including packaging.
Enter Values Above
Enter the values into the calculator. The tool computes density and maps it to a freight class.
Get a Rate Quote
Contact AMZ Prep with your freight class, origin, and destination for an exact LTL rate from 35+ carriers.
Competitive LTL Rates for Every Freight Class
AMZ Prep delivers competitive LTL freight pricing across all 18 freight classes. Four capabilities make the difference.
35+ Carrier Network
AMZ Prep rate shops across 35+ national, regional, and local carriers. More carriers means more competitive pricing for every freight class.
AI Powered Navigation
AMZ Prep's routing technology matches shipments to the fastest, most cost effective carrier. It factors weight, dimensions, and destination.
Faster Transit
AMZ Prep's freight network delivers 2 to 4 day transit on most domestic LTL lanes. Speed is built into the rate, not an upcharge.
Ecommerce Built
AMZ Prep moves freight for 5,000+ ecommerce brands. Every quote accounts for Amazon FBA inbound requirements, pallet specifications, and delivery appointment windows.
Freight Class Calculator FAQ
AMZ Prep answers the most common questions about freight class, NMFC codes, and LTL freight pricing below.
Freight class is a standardized classification system from the National Motor Freight Traffic Association. It assigns shipments to one of 18 classes (50 through 500) based on density, handling, stowability, and liability.
Freight class is primarily calculated from density. Divide shipment weight (lbs) by cubic feet to get density. Higher density means a lower class number and lower shipping cost per pound.
NMFC stands for National Motor Freight Classification. It is the industry standard that LTL carriers use to determine pricing. Incorrect classification leads to reclassification fees and billing adjustments.
A density of 10 lbs per cubic foot falls into Class 100. This class covers items like boat covers, car covers, and canvas products. AMZ Prep can provide an exact rate for Class 100 shipments.
Increase shipment density by packaging products more compactly or shipping larger quantities per pallet. Denser shipments receive lower class numbers and lower per pound freight rates. AMZ Prep can review your packaging for optimization.
Use the Multi-Item Pallet tab. Enter each item type with its quantity and weight per unit, add the overall pallet dimensions and empty pallet weight, and the calculator returns the combined density and a single freight class for the full pallet.
Yes. The density calculator has an imperial and metric toggle. Switching converts your entered dimensions and weight automatically and recalculates density in pounds per cubic foot for the correct NMFC class.
Use the Commodity Lookup tab to search by product category and see typical NMFC codes and freight classes for common items. For an exact code, confirm against the NMFTA tariff or ask AMZ Prep to verify before booking.
Yes. Amazon FBA inbound LTL shipments are priced by freight class. AMZ Prep's Middle Mile program optimizes freight class and carrier routing to reduce inbound shipping costs for ecommerce brands selling on Amazon.
Carriers inspect shipments and reclassify if the declared class is incorrect. Reclassification results in billing adjustments and potential additional fees. Use this calculator to verify your freight class before booking any LTL shipment.
AMZ Prep rate shops across 35+ carriers using AI powered navigation. This carrier network combined with volume buying power delivers competitive LTL rates across all 18 freight classes for ecommerce brands.
Get Your Freight Quote from AMZ Prep
AMZ Prep provides competitive LTL quotes within 24 hours. Share your freight class, shipment details, and destination.
