Freight Class Calculator — NMFC Density & LTL Class Lookup
Calculate your LTL freight class from shipment weight and pallet dimensions. Updated for the 2025 NMFC density overhaul with all 18 classes from 50 to 500.
📦 Calculate Freight Class
How to Calculate Freight Class: Step-by-Step
Freight class is the standardised NMFC category that LTL carriers use to price shipments. Since the July 2025 NMFC overhaul, most commodities are classified purely by density — making this calculation the single most important step before tendering LTL freight.
- Measure dimensions — Length, width and height in inches at the longest point of each dimension. Include pallet overhang, protective packaging and stretch wrap.
- Calculate cubic feet — Multiply L × W × H then divide by 1,728 to convert cubic inches to cubic feet.
- Weigh the shipment — Total weight in pounds including pallet, dunnage, crating and all packaging materials. Use a certified scale, not an estimate.
- Compute density (PCF) — Divide total weight by cubic feet. This is your pounds-per-cubic-foot figure.
- Look up freight class — Match your density to the NMFC density scale below. Higher density = lower class = lower shipping cost.
NMFC Freight Class Density Chart (Updated 2026)
This table reflects the 18 standard freight classes and their density ranges. The 2025 NMFC update added Classes 50 and 55 and moved most commodities to density-based classification.
| Class | Density (lb/ft³) | Cost Level | Typical Goods |
|---|---|---|---|
| 50 | ≥ 50 | Lowest | Bricks, cement, steel |
| 55 | 35 – 50 | Very Low | Sand, gravel, machinery |
| 60 | 30 – 35 | Low | Car parts, hardware |
| 65 | 22.5 – 30 | Low-Mid | Bottled beverages, tile |
| 70 | 15 – 22.5 | Mid-Low | Auto parts, food items |
| 77.5 | 13.5 – 15 | Mid | Tyres, bathroom fixtures |
| 85 | 12 – 13.5 | Mid | Crated machinery, engines |
| 92.5 | 10.5 – 12 | Mid | Computers, monitors |
| 100 | 9 – 10.5 | Mid-High | Boat covers, wine cases |
| 110 | 8 – 9 | Mid-High | Cabinets, framed art |
| 125 | 7 – 8 | High | Small appliances |
| 150 | 6 – 7 | High | Auto sheet metal, bookcases |
| 175 | 5 – 6 | Higher | Clothing, couches |
| 200 | 4 – 5 | Higher | Auto sheet panels, TVs |
| 250 | 3 – 4 | Very High | Mattresses, bamboo furniture |
| 300 | 2 – 3 | Very High | Wood tables, chairs |
| 400 | 1 – 2 | Premium | Deer antlers, light fixtures |
| 500 | < 1 | Highest | Ping pong balls, styrofoam |
Worked Example
A shipper tenders one standard pallet weighing 800 lbs measuring 48 × 40 × 60 inches.
- Volume: 48 × 40 × 60 = 115,200 cubic inches ÷ 1,728 = 66.67 ft³
- Density: 800 ÷ 66.67 = 12.0 lb/ft³
- Class: 12.0 PCF falls in the 12 – 13.5 range = Class 85
If the shipper compresses the stack to 48 inches tall instead, volume drops to 53.33 ft³ and density rises to 15.0 — qualifying for Class 70, which is significantly cheaper. This is why pallet height optimisation matters.
5 Tips to Lower Your Freight Class
Right-Size Packaging
Eliminating 2 inches of dead space on each dimension can drop you an entire freight class. Custom boxes pay for themselves fast.
Reduce Pallet Height
Shorter stacks = less cubic feet = higher density = lower class. Aim to keep pallets under 48″ when possible.
Photograph Everything
Snap pics of the scale ticket and tape measure against each dimension. This is your defence against carrier re-class disputes.
Include All Weight
Pallet, stretch wrap, corner boards, slip sheets — carriers weigh all of it. Leaving it out guarantees a reclassification fee.
Frequently Asked Questions
Freight class is primarily determined by density — the shipment's weight in pounds divided by its volume in cubic feet. The NMFC density scale maps density ranges to classes from 50 (densest, cheapest) to 500 (lightest, most expensive). Other factors include stowability, handling difficulty and liability risk, but after the 2025 NMFC changes, density alone determines classification for the majority of commodities.
NMFC Docket 2025-1, effective July 19 2025, moved roughly 2,000 commodity codes to pure density-based classification. The density scale expanded from 11 to 13 sub-provisions, adding Classes 50 and 55 for the densest shipments. The NMFTA estimated this would cause 2–3% cost swings for most shippers.
Higher density is always better for the shipper's wallet. Anything above 22.5 lb/ft³ puts you in Class 65 or lower, which is solidly affordable. Most palletised general freight falls in the 8–18 lb/ft³ range (Classes 70–110). If your density is under 6 lb/ft³, look for ways to compress or consolidate.
For most shipments after the 2025 changes — yes, density-based classification covers the vast majority of commodities. However, some goods have commodity-specific NMFC codes where handling, stowability or liability override density. Always verify with the NMFTA ClassIT database or your carrier for hazmat, high-value or fragile freight.
Carriers routinely inspect and re-weigh LTL shipments using precision scales and dimensioning cameras. If your declared class is wrong, the carrier reclassifies and bills the difference plus a reclassification surcharge — typically 20–50% above the original quote. Using a calculator before tendering prevents this.
No. Freight class is an LTL (less-than-truckload) pricing mechanism. Full truckload rates are typically negotiated per mile, per load or on flat-rate lane pricing. If your shipment fills more than about half a trailer, get FTL quotes — they're often cheaper than LTL at that volume.