The reference shelf
Freight class & LTL guides
Everything the calculators compute, explained — current for the post-2025 NMFC rules, with worked examples you can hand to your ops team.
How to Calculate Freight Class (Step by Step)
The four-step method carriers use: measure, cube, density, class — with worked single- and multi-pallet examples.
Read the guide → ReferenceFreight Class Chart: All 13 NMFC Density Tiers
The current density-to-class chart, what lives in each class, and the legacy 18-class table for old tariffs.
Read the guide → ReferenceNMFC Codes Explained: Finding Your Freight Class
What an NMFC item number actually is, when density decides, when the commodity does, and how to look yours up.
Read the guide → RulesThe 2025 NMFC Changes, in Plain English
Docket 2025-1 moved most freight to a 13-tier density scale. What changed, who won, and what to re-check.
Read the guide → FundamentalsDimensional Weight in Freight: Divisors & Formulas
139, 166, 6,000 — what the divisors mean, when DIM weight applies, and how chargeable weight is picked.
Read the guide → Load planningHow Many Pallets Fit on a 53-Foot Trailer?
26 straight, up to 30 turned, 52 double-stacked — the actual math, by pallet size and trailer type.
Read the guide → PricingHow Freight Class Affects Your LTL Rates
Why class 125 freight costs so much more than class 70, where reclass fees come from, and how to fight both.
Read the guide → Air freightAir Freight Chargeable Weight, Explained
Volumetric weight at 6,000 cm³/kg (≈166 in³/lb), how chargeable weight is picked, and worked examples.
Read the guide → PricingWhat LTL Freight Shipping Actually Costs
The seven inputs that set an LTL price, realistic cost ranges, and how to make any quote come in lower.
Read the guide → RiskFreight Insurance: What It Costs & When Carrier Liability Isn't Enough
Carrier liability pays by the pound, not by value. When that math fails you, what real cargo insurance costs, and how to run the numbers.
Read the guide → Commodity classesFreight Class for Furniture: Sofas, Tables & Flat-Packs
Assembled furniture ships mostly air — class 175–250. Flat-packs ride at 100–125. The density math, the NMFC items, and how packing changes the class.
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