 dimension dim calculator for airfreight dimension dim calculator for airfreight sometimes large items with a light overall weight can be charged according to the space they take up on aircraft in these cases volumetric weight or dimensional dim weight is used to calculate the shipment cost it is recommended that you calculate the volumetric weight for every shipment that you send then compare this to its actual weight the greater weight of the two is used to work out the price that you are charged example l x w x h cubic inches dim dimensional weight take the length 48 and the width of 40 and take the total height example to the right would be 22 of box plus 6 of pallet to give you 28 example 48 x 40 x 28 53760 194 277 lbs enter the quantity length width and height for each box size please enter dim factor quantity length width height in in in in in in in in in chargeable weight lbs automatic recalculation recalconclick the browser does not support javascript the calculations created using exceleverywhere will not work please access the web page using another browser please note in most cases for domestic shipments the dim factor will be 194 but please check with provider to make sure this is the case in most cases for international shipments the dim factor to use will be 166 check with provider to make sure that you are using the correct dim factors airfreight charges by the pound based on the service requested and it is based on the greater of actual weight or dimensional weight if a shipment weighs 500 lbs and the dim weight works out to 400 lbs then the chargeable weight is the actual weight of 500 lbs however if the same shipment weighed 350 lbs then the chargeable weight would be the 400 lb dim weight  