Class Freight Calculator - US LTL Density Class
Answer: A class freight calculator estimates US LTL freight class by dividing total shipment weight by cubic feet and mapping the density to the NMFC density-class table; use /tools/freight-class-calculator/ as the canonical page for this calculation.
Density is only one NMFC input. Commodity item, stowability, handling, liability, and carrier tariff rules can change the official class.
A class freight calculator estimates US LTL freight class by dividing total shipment weight by packed cubic feet and mapping density to the NMFC density-class table; the canonical page for this same calculation is Freight Class Calculator.
How the calculation works
This page is an exact-match variant for searchers who type “class freight calculator.” It uses the same density-class model as the canonical Freight Class Calculator, because both phrases refer to US LTL freight class planning.
The density path is:
cubic feet = length in inches x width in inches x height in inches x quantity / 1728
density = total weight in pounds / cubic feet
estimated class = density mapped to the NMFC density-class tableUse packed outer dimensions for the handling unit given to the LTL carrier. If cartons are shrink-wrapped on a pallet, measure the full pallet footprint and floor-to-top height, including pallet deck, wrap, top cap, and overhang.
FAQ
Is “class freight calculator” the same as “freight class calculator”?
Yes. “Class freight calculator” is a reversed-wording search variant. For internal links and broader calculator intent, use the canonical Freight Class Calculator.
How do I calculate class freight by density?
Convert the packed handling unit to cubic feet, divide total pounds by cubic feet, then map the density in lb/ft3 to the NMFC density-class table. For example, a 48 x 40 x 48 inch pallet at 500 lb has 53.33 ft3, 9.38 lb/ft3 density, and an estimated density class of 100.
Is this the official NMFC freight class?
Not necessarily. Density is a major input, but the official class can depend on the NMFC commodity item, stowability, handling difficulty, liability, packaging, and carrier tariff rules.
When does this matter for cross-border sellers?
It matters after the international leg, when imported cargo moves inside the US by LTL from a port-area warehouse, CFS, 3PL, prep center, supplier warehouse, or Amazon-adjacent facility.
Should I enter carton dimensions or pallet dimensions?
Enter the dimensions of the handling unit the carrier receives. If the LTL carrier receives palletized freight, use the full palletized dimensions rather than the individual carton dimensions.
Does freight class apply to ocean LCL?
No. Ocean LCL normally uses W/M revenue tons, comparing CBM with metric tons. Freight class is mainly a US domestic LTL trucking concept.
Does freight class apply to air freight?
No. Air freight usually compares actual gross weight with dimensional weight based on a divisor such as 6000 cm3/kg. That is a chargeable-weight calculation, not a US LTL class calculation.
What happens if I use the wrong class on an LTL shipment?
The carrier may inspect, remeasure, reweigh, reclass the shipment, and issue adjustment charges. Use this calculator for planning and confirm the official class with the carrier, broker, or current NMFC resource before booking.
Comparison
| Page or method | Best for | What it calculates | Canonical guidance |
|---|---|---|---|
| Class Freight Calculator | Exact search wording “class freight calculator” | Same density-class estimate as the canonical page | Use this page for exact-match searchers |
| Freight Class Calculator | Broader US LTL freight-class intent | Density in lb/ft3 mapped to NMFC class bands | Canonical internal target: /tools/freight-class-calculator/ |
| Freight Density Calculator | Density-only checks before class lookup | Pounds per cubic foot | Use when you only need density |
| Ocean LCL W/M | Less-than-container ocean freight billing | max(CBM, kg / 1000) revenue tons | Not a freight-class method |
| Air chargeable weight | Air or courier billing checks | max(actual kg, dimensional kg) | Not a freight-class method |
Dated facts
As of May 13, 2026, this page is maintained as an exact-match variant for “class freight calculator” and should point canonical freight-class intent to /tools/freight-class-calculator/.
As of May 13, 2026, US LTL density-class planning still commonly uses the 18-class NMFC scale from class 50 to class 500, with class 50 at 50+ lb/ft3, class 100 at 9 to under 10.5 lb/ft3, and class 500 below 1 lb/ft3. Commodity identity, handling, stowability, liability, and carrier tariffs can still change the official billed class.
Frequently asked questions
- Is class freight calculator the same as freight class calculator?
- Yes. This is an exact-match wording variant. The canonical broader calculator is /tools/freight-class-calculator/.
- How do I calculate class freight by density?
- Calculate packed cubic feet from outer handling-unit dimensions, divide total pounds by cubic feet, then map lb/ft3 to the NMFC density-class table.
- Is the density result the official NMFC class?
- Not always. Commodity item, stowability, handling, liability, packaging, and carrier tariff rules can override density.
- Does class freight apply to ocean or air freight?
- No. Freight class is mainly for US LTL trucking. Ocean LCL uses W/M revenue tons and air freight uses dimensional or chargeable weight.
- Should I measure cartons or pallets?
- Measure the handling unit tendered to the LTL carrier. If cartons are palletized, use the full pallet footprint and height including pallet, wrap, and overhang.