The rebill
You pay the corrected class rate plus a reclassification fee, weeks after the freight already delivered and after you have likely invoiced your own customer.
Free tool · Current 13-sub NMFC density scale
Know your class before the carrier reweighs it.
Since July 2025, density sets the class for most LTL freight. Measure the pallet, enter it below, and see where it lands on the scale carriers actually rate from.
Density and class worksheet
Awaiting input
Measure the pallet as it ships, including the pallet itself. Add about 5.5 inches to your height, and include any overhang. Weight is the total for all handling units.
Estimated freight class
—
Enter dimensions and weight to run the scale.
Density
— PCF
Total volume
— ft³
The scale · 13 subprovisions · your freight snaps to one notch
← Light and bulky · costs more
Dense and compact · costs less →
This is the density class only. Density decides the class for most general freight, but stowability, handling and liability can override it. Hazmat, fragile goods, high-value items and anything awkward to stack often rate higher than density alone suggests. Verify the NMFC item on your bill of lading before you book. We will check yours at no charge.
Not every carrier classifies the same way. Most LTL carriers price off the NMFC density scale this calculator uses. A handful apply their own rules or a different scale, so the class one carrier assigns can differ from another on the same shipment. When we quote a lane, we check it against the carrier actually hauling it.
What a wrong class actually costs
Carriers run pallets across dimensioners at the terminal. When the measured class does not match the bill of lading, the correction is not a conversation. It is a rebill.
Your discount
Repeat corrections signal an unreliable shipper profile. Negotiated discounts get trimmed at renewal, and the increase applies to every lane you run.
Stale item numbers
Docket 2025-1 consolidated roughly 2,000 listings. If your TMS still pulls class from an old commodity table, you may be quoting against an item that no longer exists.
The full density scale
Effective July 19, 2025 under Docket 2025-1. Subprovisions 12 and 13 are new. They reward genuinely dense freight with classes that did not exist on the old 11-sub scale.
| Sub | Density (lb per ft³) | Class |
|---|
Source: NMFTA published density and class breaks for the 13-subprovision structure. Always confirm against the current NMFC before booking.
Send me this result, plus what it should cost
The calculator is free and stays free. If you want us to take it further, tell us where the freight moves and we will come back with real numbers.
- Your calculated class and density, emailed as a record
- The full 13-sub density chart as a one-page desk reference
- A benchmark rate on your lane from our carrier pricing
- A free NMFC check on up to 10 of your current item numbers
Already know what you are shipping?
Skip the tools. Send us the lane and the pallet count and we will price it against our carrier base today.
Get a rate on this lane