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Free Logistics Tool

LTL Freight Class & Density Calculator

Calculate shipment cubic volume, total weight, density (lbs/cu ft), and estimated National Motor Freight Classification (NMFC) freight class instantly. Avoid unexpected carrier re-classification penalties and billing adjustments.

Shipment Dimensions & Weight

Add your pallet or piece specifications below. Results recalculate in real-time.

Units:
Quick Presets:
# Description / Label Length (in) Width (in) Height (in) Weight (lbs) Qty Volume
1 53.33 cu ft
Recommended Freight Class
CLASS 85 Standard Density

Packaged transmissions, cast machinery, crated equipment, cast iron stoves.

Shipment Density 12.19 lbs / cu ft (PCF)
Total Weight 650 lbs 294.8 kg
Total Volume 53.33 cu ft 1.51 m³
Total Pieces 1 pallet LTL Shipment
NMFC 18-Tier Density Spectrum Current: Class 85 (12.19 PCF)
500
400
300
250
200
175
150
125
110
100
92.5
85
70
65
60
55
50
← Lower Density / Higher Cost (Class 500) Higher Density / Lower Cost (Class 50) →
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How to Calculate Freight Class & Density

The Density Formula

In the Less-Than-Truckload (LTL) industry, freight class is governed by the National Motor Freight Traffic Association (NMFTA). Unless a specific commodity classification rule applies, freight class is determined strictly by Density (Pounds per Cubic Foot - PCF):

Volume (Cubic Feet) = (Length × Width × Height in inches) ÷ 1,728
Density (PCF) = Total Shipment Weight (lbs) ÷ Total Volume (cu ft)

Note: 1,728 is the number of cubic inches in one cubic foot (12 × 12 × 12 = 1,728).

The 4 Factors of NMFC Classification

  • 1. Density: Weight per cubic foot. Denser items (steel bolts, dense machinery) take less space relative to weight and receive lower freight classes.
  • 2. Stowability: How easily items can be stacked or packed alongside other cargo. Odd shapes, non-stackable pallets, or hazardous items incur higher classes.
  • 3. Handling: Fragile items or goods requiring extreme care or special forklift equipment receive higher classifications.
  • 4. Liability: High-value electronics, perishable cargo, or goods prone to theft or damage carry higher liability risk and higher classes.

Official 18-Tier NMFC Freight Class Density Table

The National Motor Freight Classification defines 18 classes from Class 50 (cheapest, densest) to Class 500 (most expensive, least dense). Locate your shipment bracket below:

Freight Class Density Range (PCF) Typical Commodity Examples Relative Rate
Class 50 50 lbs / cu ft or greater Steel bolts, nuts, lead ingots, dense iron hardware, solid metal parts Lowest Cost
Class 55 35 to 50 lbs / cu ft Bricks, cement, mortar, asphalt roofing shingles, heavy hardwood flooring Economy
Class 60 30 to 35 lbs / cu ft Car parts, steel pipes, tile, automotive hardware, ceramic fixtures Economy
Class 65 22.5 to 30 lbs / cu ft Boxed bottled beverages, heavy books, bottled canned goods, packaged machinery Moderate
Class 70 15 to 22.5 lbs / cu ft Automobile engines, vehicle transmissions, heavy boxed goods, dense food products Moderate
Class 77.5 13.5 to 15 lbs / cu ft Tires, snowmobiles, agricultural equipment, packaged industrial motors Standard
Class 85 12 to 13.5 lbs / cu ft Packaged transmissions, cast machinery, crated equipment, cast iron stoves Standard
Class 92.5 10.5 to 12 lbs / cu ft Computers, boxed monitors, refrigerators, compact appliances Standard
Class 100 9 to 10.5 lbs / cu ft Boat covers, caskets, car hoods, wine cases, canvas products Standard (Base)
Class 110 8 to 9 lbs / cu ft Cabinets, framed canvas artwork, boxed industrial equipment Higher Cost
Class 125 7 to 8 lbs / cu ft Small household appliances, vending machines, crated furniture Higher Cost
Class 150 6 to 7 lbs / cu ft Assembled wooden furniture, sheet metal lockers, large crated goods Higher Cost
Class 175 5 to 6 lbs / cu ft Couches, padded chairs, clothing on racks, upholstered items Higher Cost
Class 200 4 to 5 lbs / cu ft Televisions, aircraft parts, aluminum tables, mattresses Expensive
Class 250 3 to 4 lbs / cu ft Bamboo furniture, mattresses, plastic pipe fittings, foam moldings Expensive
Class 300 2 to 3 lbs / cu ft Model airplanes, wood cabinets (assembled), lampshades, lightweight kayaks Expensive
Class 400 1 to 2 lbs / cu ft Lightweight deer stands, corrugated plastic displays, decorative globes Premium
Class 500 Less than 1 lb / cu ft Bags of ping pong balls, gold dust, bulk foam peanuts, spun fiber Highest Cost

4 Pro Tips to Avoid Carrier Re-Classification Charges

Measure From the Widest Points

Freight carriers use automated overhead 3D dimensional laser scanners. Always measure including the pallet base, corner protectors, and any cargo overhang.

Include Pallet Tare Weight

A standard 48" × 40" wooden GMA pallet weighs 35 to 45 lbs (16–20 kg). If you only weigh the merchandise, the carrier will re-weigh the shipment at the terminal and charge an adjustment fee.

Prevent Shrink-Wrap Bulges

Laser scanners measure the bounding box of your pallet. If shrink-wrap bulges 2 inches on each side, your calculated volume increases, dropping your PCF density and raising your freight class.

Use Real-Time Carrier APIs at Checkout

Manual rate charts become obsolete quickly. Connecting your store directly to carrier APIs ensures customers pay exact freight rates including liftgate, accessorials, and correct density tiers.

Frequently Asked Questions

What is NMFC freight class and why does it matter?

The National Motor Freight Classification (NMFC) is a standardized pricing system used by North American freight carriers to establish fair, uniform shipping rates for Less-Than-Truckload (LTL) cargo. It categorizes commodities into 18 classes (50 to 500) based on four transport characteristics: density, stowability, handling, and liability. Lower classes represent denser, easier-to-handle cargo and carry lower shipping rates.

Shipment density is measured in Pounds per Cubic Foot (PCF). First, determine the volume in cubic feet by multiplying Length × Width × Height in inches and dividing by 1,728. Next, divide the total weight (including pallet and packaging) by the total cubic volume. For example, a 650 lb pallet measuring 48" × 40" × 48" has a volume of 53.33 cubic feet, giving a density of 12.19 PCF (Class 85).

LTL carriers verify freight at origin and hub break-bulk terminals using dimensional barcode scanners and forklift scales. If your shipment has a lower freight class than actual density requires, the carrier will issue a Freight Reclassification Inspection Fee (often $25–$75) and re-bill the shipping invoice at the higher, adjusted freight class rate.

EcomPlugins provides carrier-certified shipping extensions for Magento 2 and Shopify (including Estes, R+L Carriers, TForce Freight, FedEx Freight, Central Transport, and Old Dominion). Our modules read product catalog weights and dimensions, calculate consolidated pallet density automatically, pass exact NMFC codes to carrier APIs, and return real-time live freight quotes to your store checkout.