But there is another very important point. The calculator doesn’t save $37 on its own. It simply tells the seller: “Your package’s DIM weight is 56 lbs.” Then the seller says: “My product weighs only 5 lbs. Why is the box so big?” So, they: Reduce the box size → DIM weight decreases → billable weight may decrease → shipping cost can be reduced. Even FedEx states that reducing extra space can lower shipping costs. And that is the business value of a tool like DIMMath. A seller enters the following into the calculator: Length + Width + Height + Actual Weight And discovers: Actual Weight → 5 lbs DIM Weight → 56 lbs Chargeable Weight → 56 lbs Then, by optimizing the packaging, they might see: New DIM Weight → 19 lbs In other words, the calculator becomes a decision-making tool for saving on shipping costs, not just a mathematical calculator. UPS, too, automatically calculates DIM weight and billable weight when dimensions are entered into its shipping systems.