Freight Class Calculator with Density & NMFC Estimate

Guessing your freight class is risky. If it’s wrong, your carrier can hit you with a reclass fee after pickup, and that can add hundreds of dollars to your bill. This calculator fixes that.

Just enter your pallet’s length, width, height, and weight, and you’ll get your class, density, and cube right away. It’s free, there’s no sign-up, and the numbers are based on the same density formula that LTL carriers use to price your shipment.

Calculate Your Freight Class

Instant NMFC estimate

Length in

Width in

Height in

Weight lb

Pallets

Est. freight class

N/A

Density 0 lb/ft³

Cube 0 ft³

Weight 0 lb

Enter your pallet’s dimensions and weight to see its class.

Density-based estimate on the current 2026 NMFC scale. Confirm the exact NMFC item with your carrier before shipping.

The Math Behind Your Freight Class

The math is simple, but it’s the same formula that LTL carriers apply during freight classification. First, multiply your pallet’s dimensions to get the volume in cubic inches. Divide that number by 1728 to convert it to cubic feet.

Then divide your weight by the cubic feet to get density in pounds per cubic foot. That density value is matched against the current NMFC density-to-class scale to determine your class.

Your class directly sets your shipping rate. Lower classes cost less per pound to ship; higher classes cost more.

Freight class calculator infographic showing how to calculate freight density and determine NMFC freight class using pallet dimensions, volume, cubic feet, weight, and PCF density.

Key Advantages of Using Freight Class Calculator

Instant Results

Enter your dimensions and weight to get your estimated NMFC class instantly. No waiting, no page reloads.

Personalized Ways to Lower Your Cost

See exactly how much weight or height you need to add or remove to drop into a cheaper class. The result is based on your actual shipment, not general advice.

Built on the Current 2026 NMFC Scale

This calculator uses NMFTA’s current 13-tier density scale, not an outdated chart. Your estimate reflects the classification standard carriers are pricing against right now.

Any Unit, One Calculator

Toggle between inches/pounds and centimeters/kilograms. Results always display in standard US units per NMFC convention.

See the Full Breakdown

Get density, cube, and weight alongside your class estimate. Not just a number, so that you can verify the math yourself.

Free, No Sign-Up

It is completely free to use. There is no account creation requirement. Nothing is saved after you close the tab.

How the Freight Class Calculator Works

Enter your pallet’s length, width, and height, then add its weight to begin.
Adjust the Pallets field if you are shipping multiple pallets of the same size; the calculator multiplies your total cube and weight.
Your estimated class appears automatically below, along with your density, cube, and total weight.
Switch to cm/kg if you’d rather enter metric measurements, then switch back anytime.
Open Ways To Lower Your Cost to see exactly how much a change in weight or height would drop your shipment into a cheaper class.

NMFC Density-to-Class Chart

This table reflects the 13-tier density scale that has been in effect since NMFC restructuring, which added Classes 50 and 55 as new low-density tiers. Shipments dense enough to qualify no longer default to Class 60.

NMFC Density to Class Chart: all 13 density-based freight classes (50–400) with PCF ranges and examples.
Freight Class	Density Range (PCF)	Typical Items
50	50 or more	Steel, machinery parts, dense hardware
55	35 to under 50	Dense hardware, bricks
60	30 to under 35	Dense boxed goods
65	22.5 to under 30	Auto parts, appliances
70	15 to under 22.5	Auto parts, drums of liquid
85	12 to under 15	Appliances, boxed goods
92.5	10 to under 12	Computers, monitors
100	8 to under 10	Cabinets, boxed electronics
125	6 to under 8	Small machines, wine cases
175	4 to under 6	Auto sheet metal, clothing
250	2 to under 4	Bulky, low-density furniture
300	1 to under 2	Very light or fragile goods
400	Less than 1	Ping pong balls, canoes

All 18 NMFC Classes for Freight

The NMFC system has 18 classes total: 50, 55, 60, 65, 70, 77.5, 85, 92.5, 100, 110, 125, 150, 175, 200, 250, 300, 400, and 500.

Five of these, 77.5, 110, 150, 200, and 500, are tied to specific commodity listings rather than pure density, so they will not come up from a density calculation alone.

5 Commodity-Based NMFC Freight Classes (77.5, 110, 150, 200, 500) not tied to density alone.
Freight Class	Basis	Typical Items
77.5	Named commodity listing	Specific NMFC items only
110	Named commodity listing	Small machines, wine cases
150	Named commodity listing	Mixed boxed goods, clothing
200	Named commodity listing	Bulky furniture, mattresses
500	Named commodity listing	Very low density, high value goods

How Is Freight Class Determined?

Density is only part of the story. Freight class numbers actually come down to four factors working together, and missing any one of them is how shipments end up reclassified after pickup.

1. Density

Weight relative to size. This is the dominant factor for general freight that our calculator estimates directly. Low density means a higher class. High density means a lower class.

2. Stowability

How efficiently the shipment packs against other cargo in a trailer. Odd shapes, hazmat restrictions, or items that cannot be stacked reduce stowability and can raise the class.

3. Handling

Whether the shipment needs special equipment, extra labor, or extra care to load and unload safely. Freight that needs a crane, team lift, or careful manual handling raises the class. Freight that loads easily with a standard forklift keeps the class lower.

4. Liability

The risk of theft, damage, or spoilage in transit. High-value, fragile, or perishable goods carry elevated liability, which raises the class since the risk of a claim gets priced in. Sturdy, low-value, non-perishable goods carry less liability and stay lower.

A lower class means a lower shipping rate. A higher class costs more to ship. These four factors matter beyond just the number itself. That’s why a density-based estimate is a strong starting point but not a guarantee.

Freight class determination infographic showing the four NMFC factors: density, stowability, handling, and liability, with a comparison of ceramic tile and glass vases and their impact on freight class and shipping costs.

How to Avoid a Reclassification Fee

Carriers reweigh and remeasure freight at the terminal. If your declared class does not match what they find, you get rebilled, and in some cases, freight is held until the charges are resolved.

A reclassification fee runs $50 to $150, plus the rate difference between your declared class and the corrected one. Exact fees vary by carrier, so check your carrier’s tariff for specifics. A reclass from Class 70 to Class 125 can push your freight bill significantly higher.

Five habits prevent most reclass fees:

Weigh your shipment on a certified scale. Include the pallet’s own weight too.
Measure the tallest, widest, and longest points of your pallet. If anything hangs over the edge, count that too.
Round dimensions up, never down.
Declare your NMFC item number on the bill of lading if you know it.
Shrink wrap to a uniform footprint. Loose or overhanging freight measures larger than it needs to, which can bump you into a higher class.

Shipments moving through high-volume LTL hubs, such as Chicago, Memphis, Dallas, and the ports of Los Angeles and Long Beach, get inspected more often because of the sheer volume passing through. Measurement errors on these lanes usually get caught quickly.

When Freight Class Doesn’t Apply

LTL (less-than-truckload) shipping covers freight about 150 to 15,000 pounds, sharing trailer space with other shippers. Below that range, small parcel carriers handle it instead. Above it, FTL (full truckload) is the better option, and class of shipment does not apply, since one shipper owns the entire trailer.

NMFC codes apply to domestic U.S. freight only. NMFC class codes apply to domestic U.S. freight only. International shipments use Harmonized Tariff Schedule (HTS) codes instead, a different system built for customs and tariffs, not trailer-space pricing. So a commodity’s NMFC class has no bearing on its international HS code, and vice versa.

FAQs

Multiply length times width times height in inches, divide by 1,728 to get cubic feet, then divide weight in pounds by that number to get density. Check your density against the NMFC chart above. That will tell you your class.

Yes. Class depends on density and risk factors, not product name. Unrelated items with matching density and handling needs can land in the same class.

PCF stands for pounds per cubic foot, the unit used to measure freight density. It is calculated by dividing a shipment’s weight by its cubic feet.

If you know your commodity type, your carrier or a freight broker can confirm the exact NMFC code for it. Without a known code, this calculator gives you a density-based estimate instead, which covers most general freight accurately.

Your carrier may have found a different number when they reweighed or remeasured your shipment. Or they may have added extra weight for handling, stowability, or liability, not just density. Fragile, oddly shaped, or high-value freight often classifies higher than density suggests.

About This Calculator

Built on the NMFC density scale maintained by the National Motor Freight Traffic Association. This tool estimates class from density alone, while handling, stowability, and liability can raise your final class beyond this estimate. Always confirm your exact class with your carrier before shipping.

Estimate only. Density is the primary factor in most freight class determinations, but handling, stowability, and liability can shift your final class. Confirm your exact class with your carrier before booking, especially for fragile, valuable, or unusual freight. Have any questions about this tool? Contact us.