Freight Class Calculator

How is freight density class calculated?

Let's start with an example shipment. A 40" by 48" pallet is stacked with boxes of products 48" high. The pallet and its contents weighs a total of 425 lbs.

First the volume is calculated by multipled the dimensions together:

40 x 48 x 48 = 92160 cubic inches

Now the volume is converted from cubic inches to feet:

92160 / 1728 = 53.33 cubic feet

To get the density we divide the weight by the volume:

425 / 53.33 = 7.97 pounds per cubic foot

The density is looked up on the table at the left. The density is above 7 but less than 8, so the class is 125.

Density	NMFC Freight Class
50	50
35	55
30	60
22.5	65
15	70
13	77.5
12	85
10.5	92.5
9	100
8	110
7	125
6	150
5	175
4	200
3	250
2	300
1	400
<1	500

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