Free Logistics Tool
Freight Class Calculator with NMFC Density Chart
Calculate LTL freight density, estimate the current 2025 NMFC class, compare multiple cartons or pallets, and see what the class can mean for rates.
Calculate Freight Class From Dimensions and Weight
Enter one or more packed carton or pallet rows. Calculations use full-precision feet and pounds internally, even when the visible inputs are centimeters or kilograms.
| Label | Qty | Length in | Width in | Height in | Weight each lb | Row ft³ | Action |
|---|
Total density—
Estimated NMFC freight class—
Total volume—
Total weight—
Rate meaning
Add at least one valid carton or pallet to calculate freight class.
Next lower class tip
The calculator will show the next density breakpoint after a valid result.
2025 NMFC density scale
Freight Class Chart by Density
This calculator uses the updated 2025 NMFC density scale for density-based LTL freight classes. Freight class can still be affected by handling, stowability, liability, declared value, hazardous material status, and commodity-specific NMFC rules, so use the result as a planning estimate and confirm final classification with your carrier or 3PL.
| Density range | NMFC freight class | Rate guidance | Optimization note |
|---|---|---|---|
| Less than 1 lb/ft³ Your result | Class 400 | Very low-density freight. This usually rates as expensive LTL freight because it takes a lot of trailer space relative to weight. Confirm whether the item has special handling or packaging requirements. | Check for excess packaging, overhang, or commodity-specific rules. |
| 1 but less than 2 lb/ft³ Your result | Class 300 | Low-density freight. Expect a high rate per hundredweight compared with denser goods, and check whether packaging can reduce cube without risking damage. | Reducing dead space can have a meaningful class impact. |
| 2 but less than 4 lb/ft³ Your result | Class 250 | Bulky freight. Rates are typically high because the shipment occupies meaningful trailer space for each pound shipped. | Review pallet height, void fill, and carton consolidation. |
| 4 but less than 6 lb/ft³ Your result | Class 175 | Moderate-low density freight. This class is still rate-sensitive, so small packaging changes that reduce height or dead space can matter. | Watch carton height and pallet overhang before tendering. |
| 6 but less than 8 lb/ft³ Your result | Class 125 | Mid-range density freight. This is common for palletized commercial shipments; quote rates can vary materially by lane and carrier discount. | Confirm lane pricing and carrier discounts before booking. |
| 8 but less than 10 lb/ft³ Your result | Class 100 | Better-density freight. It generally prices more efficiently than bulky classes, but final class can still change if the commodity has handling or liability concerns. | Exactly 8.0 lb/ft³ moves into Class 100. |
| 10 but less than 12 lb/ft³ Your result | Class 92.5 | Dense freight. This usually means lower LTL rate per hundredweight than class 100+ freight, assuming no special commodity rules apply. | Confirm stackability and any declared-value rules. |
| 12 but less than 15 lb/ft³ Your result | Class 85 | Dense, efficient freight. Carriers can usually stow this more efficiently, which often improves rating. | Good density, but dimensions still need to be accurate. |
| 15 but less than 22.5 lb/ft³ Your result | Class 70 | High-density freight. This is typically favorable for LTL rates, but verify packaging, stackability, and declared value. | Check pallet strength and packaging integrity. |
| 22.5 but less than 30 lb/ft³ Your result | Class 65 | Very dense freight. Rates are generally lower per hundredweight, though minimum charges and accessorials can still dominate small shipments. | Accessorials may matter more than class on small moves. |
| 30 but less than 35 lb/ft³ Your result | Class 60 | Very high-density freight. This class often rates efficiently, but carrier reweigh/reclass can still apply if dimensions are off. | Keep weight and dimensions documented. |
| 35 but less than 50 lb/ft³ Your result | Class 55 | Extremely dense freight. Confirm weight accuracy and pallet strength because dense shipments can trigger handling constraints. | Dense loads need strong pallets and clear handling notes. |
| 50 or greater lb/ft³ Your result | Class 50 | Highest-density class in the current density scale. Usually the lowest density-based LTL class, but commodity-specific NMFC rules may override the density estimate. | Confirm no commodity-specific NMFC exception applies. |
How it works
How to Calculate LTL Freight Class
Measure the shipped unit
Use outside dimensions including the pallet, packaging, overhang, and final shipping height.
Convert cube to density
Total cubic feet equals quantity × length × width × height. Density equals total pounds divided by total cubic feet.
Map density to class
The lookup uses full precision and lower-bound-inclusive breakpoints, so exactly 8.0 lb/ft³ returns Class 100.
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FAQ
Freight Class Calculator Questions
A freight class calculator estimates the NMFC class for an LTL shipment from its dimensions and weight. It converts shipment size into cubic feet, calculates density in pounds per cubic foot, and maps that density to the current NMFC density-class table.
Measure the shipment including pallets and packaging, multiply length by width by height to get cubic inches, divide by 1,728 to get cubic feet, then divide total weight by cubic feet to get density. The density maps to an NMFC freight class, although handling, stowability, liability, value, and commodity rules can override a density-only estimate.
The 2025 density scale uses 13 density-based classes: 400, 300, 250, 175, 125, 100, 92.5, 85, 70, 65, 60, 55, and 50. Lower-density shipments receive higher classes, while denser shipments generally receive lower classes.
The 2025 NMFC update made density the primary classification factor for many commodities and simplified the density scale for affected items. Older calculators may still show density-only classes like 500, 200, 150, 110, or 77.5, so use a calculator that states it follows the updated 2025 density scale.
NMFC freight class is a standardized LTL classification used to rate freight moving by motor carrier. It considers density, handling, stowability, and liability, and for many commodities density is now the main factor.
Not always. Density is the main factor for many commodities, but special handling, irregular shape, hazardous materials, liability, perishability, declared value, or a commodity-specific NMFC item can change the final class.
High-density freight usually falls into lower classes such as 70, 65, 60, 55, or 50. Lower classes generally mean the freight is more efficient to move because it uses less trailer space per pound.
Yes. The calculator should total the cubic feet and weight across all pallets or cartons, then calculate one shipment density from the combined totals. This is better than calculating each pallet separately when the carrier rates the shipment as a whole.
Yes. Measure the freight exactly as it will ship, including the pallet, packaging, overhang, and total height. Carriers can remeasure or reweigh freight, and incorrect dimensions can cause reclass or adjustment charges.
LTL carriers use freight class to price how difficult and costly a shipment is to move. Higher classes usually cost more per hundred pounds because the freight is bulkier, harder to handle, harder to stow, or carries more risk.
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