Freight class 100
Enter length, width, height, and weight to see the density and the density-based class.
Freight class
—
- Volume
- — ft³
- Density
- — lb/ft³
- Subprovision
- —
This is a density-based estimate using the 13-subprovision density scale from NMFC Docket NMFC-2025-1. Actual classification is also affected by handling, stowability, and liability characteristics, and the density scale applies only when those issues are absent. Your carrier makes the final call.
| Sub | Density (lb/ft³), as published | Class |
|---|---|---|
| 1 | Less than 1 | 400 |
| 2 | 1 but less than 2 | 300 |
| 3 | 2 but less than 4 | 250 |
| 4 | 4 but less than 6 | 175 |
| 5 | 6 but less than 8 | 125 |
| 6 | 8 but less than 10 | 100 |
| 7 | 10 but less than 12 | 92.5 |
| 8 | 12 but less than 15 | 85 |
| 9 | 15 but less than 22.5 | 70 |
| 10 | 22.5 but less than 30 | 65 |
| 11 | 30 but less than 35 | 60 |
| 12 | 35 but less than 50 | 55 |
| 13 | 50 or greater | 50 |
Class 100 covers freight from 8 lb/ft³ up to but not including 10 lb/ft³. It is the first band in the scale whose class is not above 100, and its lower bound at 8 lb/ft³ is the point the site's worked example reaches when about 1.67 pounds are added to a 425-pound shipment.
Class 100 by the numbers
Class 100 is subprovision 6 of 13 in the current scale, and NMFTA's published wording for it is "8 but less than 10".
The band one step lighter is class 125 (6.00 ≤ density < 8.00 lb/ft³). The band one step denser is class 92.5 (10.00 ≤ density < 12.00 lb/ft³).
It spans 2.00 lb/ft³, wider than 1 of the other 10 bounded bands in the scale.
In a handling unit measuring 40 × 48 × 48 in — about 53.33 ft³, an illustrative size rather than a standard pallet specification — class 100 covers shipments weighing 426.67 lb or more but less than 533.33 lb.
Crossing the 8 lb/ft³ boundary
The 8 lb/ft³ boundary is the one the calculator most often points at, because the worked example sits just below it. At a volume of about 53.33 ft³ the boundary is 426.67 lb and the example weighs 425 lb, so the hint reads as an instruction to add a pound and a half rather than as an abstract definition.
Above this band the class steps get smaller while the bands get wider. The next band down is 12.5 class points away and the one after that is 7.5, so the benefit of adding density keeps shrinking exactly as the density needed to reach the next band keeps growing.
Frequently asked
How much weight does it take to move from class 125 to class 100?
Enough to reach 8 lb/ft³. At a volume of about 53.33 ft³ that is 426.67 lb, up from the 425 lb in the site's worked example, so roughly 1.67 lb.
Does class 100 mean the shipment is priced at 100?
No. Class numbers are classification categories, not prices or percentages. A carrier's tariff maps a class to a rate through its own discount and minimum-charge structure.