1) What does Class 125 mean?
Class 125 is a common LTL freight class used in density-based rating. In standard density tables, it usually applies when shipment density falls from 7.00 to less than 8.00 pounds per cubic foot.
Class 125 Calculator Form
This estimator uses shipment cube, weight, density, and optional accessorial charges.
Example Data Table
These examples show how density influences the estimated freight class.
| Scenario | Dimensions | Pieces | Total Weight | Total Cube | Density | Estimated Class |
|---|---|---|---|---|---|---|
| Class 125 Example | 48 × 40 × 60 in | 1 | 500 lb | 66.67 ft³ | 7.50 lb/ft³ | 125 |
| Denser Shipment | 48 × 40 × 60 in | 1 | 900 lb | 66.67 ft³ | 13.50 lb/ft³ | 77.5 |
| Lower Density Shipment | 48 × 40 × 72 in | 1 | 525 lb | 80.00 ft³ | 6.56 lb/ft³ | 150 |
Formula Used
1) Cubic feet per piece
Cubic Feet per Piece = (Length in feet × Width in feet × Height in feet)
2) Total cubic feet
Total Cubic Feet = Cubic Feet per Piece × Number of Pieces
3) Density
Density = Total Weight in Pounds ÷ Total Cubic Feet
4) Estimated freight class
The calculator maps density to a standard density-based LTL class table. Class 125 generally applies from 7.00 to less than 8.00 lb/ft³.
5) Base freight charge
Base Charge = max((Weight in Pounds ÷ 100) × Rate per CWT, Minimum Charge)
6) Fuel and extras
Fuel Charge = Base Charge × Fuel %
Total Estimate = Base Charge + Fuel Charge + All Selected Accessorial Charges
This is a strong estimating method for density-rated freight. Actual carrier classing can still change for handling, stowability, liability, packaging, or commodity exceptions.
How to Use This Calculator
- Enter the shipment reference so your exports stay organized.
- Add length, width, height, and the number of pieces.
- Pick the correct dimension unit and enter the total shipment weight.
- Choose the weight unit, then enter your rate per CWT.
- Add minimum charge, fuel surcharge, and any manual accessorial amount.
- Turn on liftgate, residential, limited access, or cargo coverage if needed.
- Press Calculate Class 125 to show the result above the form.
- Review the density result, class suggestion, and total estimate.
- Use the CSV or PDF buttons to export a shareable record.
Frequently Asked Questions
2) Does this tool calculate only density?
No. It also estimates base freight, fuel surcharge, selected accessorials, cargo coverage, and a total charge. That gives you both classification guidance and a practical quoting view in one page.
3) Why can the actual carrier class differ?
Carriers may adjust class for liability, packaging, handling difficulty, stowability, or commodity-specific NMFC rules. Density is powerful, but it is not always the only factor that decides the final billable class.
4) What happens if density is above 8 lb/ft³?
If density rises above the Class 125 band, the shipment often trends into lower class numbers such as 110 or 100. Lower class numbers commonly indicate denser freight and can improve rating outcomes.
5) What happens if density is below 7 lb/ft³?
If density drops below 7 lb/ft³, the shipment usually trends toward higher class numbers such as 150. Higher class numbers often reflect lighter, bulkier freight that takes more trailer space per pound.
6) Should I enter pallet dimensions or carton dimensions?
Enter the final shipping footprint that the carrier sees. For palletized freight, use pallet dimensions including total loaded height. That gives a more realistic cube and a better density estimate.
7) Why is there a minimum charge field?
Many LTL tariffs and quotes use a minimum charge even when the calculated CWT amount is lower. Including it makes the estimate closer to real invoice behavior for smaller shipments.
8) Can I export the calculation for clients or internal review?
Yes. After you calculate, the page enables CSV and PDF exports. Those files can support pricing reviews, quoting workflows, customer communication, or internal shipment documentation.