Automotive/Density or item-specific
Lead-acid battery freight class and NMFC guide
Lead-acid batteries are dense and potentially regulated. The class is only part of the story: acid, venting, and hazardous-materials rules can decide whether the shipment moves at all.
Reviewed November 11, 2026 · Reference 2026.11 · Estimate, not a classification
At a glance
MixedClassification basis
Density or item-specific
Typical packed density
40–70 lb/ft³
Tight estimate
Density-rated span
Class 50–55
Reclass risk
High
The commodity ships in several forms, is easy to under-measure, or changes cube sharply with assembly or packaging.
Handling flags
Density-based estimate. Confirm the NMFC item, the packaging form, and any density subprovision before booking.
What drives the class
The density story behind lead-acid batteries.
Lead-acid batteries are dense because of the lead plates and electrolyte. Density usually lands in a favorable class, but hazmat status can override the normal LTL process. New batteries, used batteries, and battery cores may be regulated differently, and a battery that is leaking or damaged may be refused. Packaging must contain the battery and any acid, and the BOL needs the correct hazardous-materials description when one applies.
Density or item-specific. Battery items can be density-rated or item-specific, and hazmat rules may apply. The chemistry and condition matter as much as the cube.
Density thresholds
Where the estimate sits on the 2025 scale.
The highlighted rows are the classes touched by the endpoints of the typical density estimate. A single measured density returns one class; the span is a planning range. The scale is effective July 19, 2025.
| Density band | Class | Estimate |
|---|---|---|
| 50 or more lb/ft³ | 50 | Typical span |
| 35 to under 50 lb/ft³ | 55 | Typical span |
| 30 to under 35 lb/ft³ | 60 | Reference |
| 22.5 to under 30 lb/ft³ | 65 | Reference |
| 15 to under 22.5 lb/ft³ | 70 | Reference |
| 12 to under 15 lb/ft³ | 85 | Reference |
| 10 to under 12 lb/ft³ | 92.5 | Reference |
| 8 to under 10 lb/ft³ | 100 | Reference |
| 6 to under 8 lb/ft³ | 125 | Reference |
| 4 to under 6 lb/ft³ | 175 | Reference |
| 2 to under 4 lb/ft³ | 250 | Reference |
| 1 to under 2 lb/ft³ | 300 | Reference |
| 0 to under 1 lb/ft³ | 400 | Reference |
Measure it right
The handling unit is the shipment.
Carriers measure what is tendered, not the product inside the box. Use the pallet, crate, or bundle as the handling unit and include everything that travels with it.
- Measure the battery or pallet as packaged, including caps, terminal protection, and spill containment.
- Use gross weight; a pallet of industrial batteries can exceed standard lift limits.
- Confirm the weight per handling unit and the carrier hazmat acceptance before booking.
The formula
cube = L × W × H ÷ 1,728
density = gross lb ÷ cubeRound for display only. Compare the unrounded density to the scale boundary.
Possible hazmat
Regulated articles or residues can require papers, placards, or a specialty carrier.
Heavy / concentrated load
Weight distribution, axle limits, and lift equipment need a pre-booking check.
Pack it for the rating
Packaging changes the cube before it changes the class.
- Protect terminals, keep batteries upright, and use acid-resistant containment where required.
- Do not ship damaged or leaking batteries as general freight.
Don't confuse it with
Adjacent items, different answers.
The most expensive classification mistake is usually a description that sounds close but is not the item. Check these before you copy a description from another shipment.
Lithium batteries
Dry-cell batteries
Battery cores
Before you book
Make the rating defensible.
- Confirm the item and the hazmat classification for the specific battery.
- Ask whether the carrier accepts the battery type and condition.
- Have the required shipping papers and marks ready before pickup.
BOL description template
Starting pointLead-acid batteries, [new/used], [quantity] batteries, [gross weight] lb gross, [length x width x height] in per pallet, [hazmat description if applicable].
Add the confirmed NMFC item number before you tender the shipment. The template describes the freight; it is not a classification.
Common questions
Lead-acid batteries and the 2025 scale.
How are lead-acid batteries classified for LTL freight?
At an estimated packed density of 40–70 lb/ft³, the 2025 density scale spans Class 50–55. That is a planning span derived from the endpoints of the density estimate, not a promise that every shipment lands in every class. The NMFC item and the shipment as tendered control the final class.
What is the classification basis for lead-acid batteries?
Density or item-specific. Battery items can be density-rated or item-specific, and hazmat rules may apply. The chemistry and condition matter as much as the cube.
How do I confirm the NMFC item for lead-acid batteries?
Confirm the item and the hazmat classification for the specific battery. Ask whether the carrier accepts the battery type and condition. Have the required shipping papers and marks ready before pickup. Confirm the current item in ClassIT+ or with the carrier before booking.
Related commodities
Keep the comparison close.
Automotive
Auto parts
Auto parts range from dense brake rotors to bulky body panels. The class depends on the part, the packaging, and whether the shipment is new, used, or remanufactured.
Class 70–92.5Automotive
Tires
Tires are bulky and awkward, and new, used, and baled tires can follow different classification paths. Density depends heavily on whether the tires are loose, stacked, banded, or baled.
Class 70–100Plastics & chemicals
Paint
Paint is dense and often regulated. The class is usually favorable, but the hazmat status of the paint and any solvents can decide the carrier and the paperwork.
Class 50–55Automotive
Bumpers
Bumpers and body panels are bulky, fragile, and easy to scratch. The class usually turns on the carton or crate and on whether the parts are nested or shipped individually.
Class 100–175Sources & limits
What this page is, and what it is not.
This is an independent planning reference, not the NMFC and not a carrier classification. The typical density is an estimate. The class span is derived from the 2025 density scale. The NMFC item, the carrier tariff, and the shipment as tendered control the final rating.
Reviewed November 11, 2026 · Reference 2026.11
- NMFTA — National Motor Freight Classification
The official classification system, its 18 classes, and the role of the NMFC item.
- NMFTA — 2025 NMFC changes
The July 19, 2025 effective date and the density-scale restructuring.
- NMFTA — ClassIT+
The licensed lookup for current NMFC item numbers and classification text.
- PHMSA — hazardous materials shipping
Federal hazmat rules that can override a density-based class.
Next step
Measure the load, then check the class.
Use the freight class calculator for a measured density, the pallet calculator for the finished handling unit, and the chart for the full 2025 reference.