Freight density calculator

What is freight density?

Freight density is your shipment’s weight relative to the space it occupies — pounds per cubic foot, written PPCF or PCF. You get it in two steps. First find the volume in cubic feet: multiply length × width × height in inches, then divide by 1,728 (the number of cubic inches in a cubic foot). Then divide your total weight by that volume. A 48 × 40 × 48-inch pallet is 53.33 cubic feet; at 600 pounds that’s a density of about 11.25 lb/ft³. Measure to the extreme points of the freight, including the pallet and any overhang — that is the space the carrier has to sell.

Why is knowing your freight density important?

LTL carriers sell trailer space, not just weight. Two shipments that weigh the same can take up wildly different amounts of a trailer, and the bulky one costs more to haul. Density captures exactly that trade-off in a single number, which is why it’s the primary input to your NMFC freight class. Knowing your density up front means you can estimate your class, quote accurately, and avoid the most common LTL billing surprise — a carrier reweigh-and-reclass at the dock that pushes the final invoice above the quote.

How does freight density affect rates?

Higher density lands you in a lower freight class, and a lower class generally means a lower rate per hundredweight. Light, bulky freight does the opposite: it fills more trailer for less weight, classes higher, and costs more. That’s why packing efficiently — minimizing wasted air space and overhang — directly lowers your freight cost. Run your numbers above, then check the class with our lookup, or just send us the lane and we’ll classify and price it for you.