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. Girth The DPD Girth Calculator will help you find out quickly and simply if your parcel is within the limit for combined dimensions (girth). Volumetric weight The volumetric weight indicates how much space a parcel takes up in relation to its weight. We calculate this with the formula: 1m3 = 250