Girth and Volumetric Weight Calculator. For any shipment with DPD please remember that your parcel can weigh up to 31.5 kg and the combined dimensions (longest side + circumference) can be max. 300 cm. In addition the max. length of the longest side can be 175 cm.The DPD Girth Calculator will help you find out quickly and simply if your parcel is within the limit for combined dimensions (girth). Maximum dimensions for your DPD parcel: Length: 175 cm (longest side) Combined dimensions: 300 cm (girth + longest side) Weight : 31,5 kg Volumetric weight The charge for air freight is based on the parcel's volumetric weight, if this is greater than the actual weight in kg. The volumetric weight indicates how much space a parcel takes up in relation to its weight, and is calculated on the basis of the TACT rules operated by IATA (International Air Transport Association) using the following formula:  Length x width x height in cm / 5.000 The volumetric weight applies only to DPD ICP parcels.