Dimensional weight, also called “dim” weight, is used because the space a package takes on an aircraft may cost more than the package’s actual weight. You should calculate dimensional weight on every shipment, compare that to its actual weight; the greater of the two will determine your shipping cost. International and domestic dimensional weights are calculated differently using the formulas below. For Domestic Shipments: L x W x H (cubic inches) / 194 = Dimensional Weight. Example: 30″ x 24″ x 22″ = 15,840 / 194 = 82 lbs. (round up to the nearest pound) The Dimweight is given in pounds. If you have a Javascript compatible browser, you can use our quick calculator below. For International Shipments: L x W x H (cubic inches) / 166 = Dimensional Weight. Example: 30″ x 24″ x 22″ = 15,840 / 166 = 95 lbs. (round down to the nearest pound) Domestic International Inches/Pounds Metric Length Width Height Volumetric Weight