Well, think about it like this: imagine you're shipping a big box of feathers, versus a small box of bricks. Even though the box of feathers is bigger, it's obviously going to weigh a lot less than the box of bricks. But if you're just charging based on the weight, you might end up losing money on the feathers, because they take up so much space in the truck.
That's where dimensional weight comes in - it's a way of taking into account the size of the package, as well as its weight. This means that even if something is really light, if it's big and takes up a lot of space, it's going to cost more to ship. It's kind of like how airlines charge more for bigger suitcases, even if they don't weigh as much.
So, when UPS changed its dimensional weight rules in 2018, it was a pretty big deal for anyone who ships packages regularly. The new rules meant that more packages would be subject to dimensional weight pricing, which could increase the cost of shipping for some people. But is this really a bad thing, or is it just a necessary change to make the shipping industry more efficient?
Dimensional Weight: Pricing & Calculator | DFH
