The differences concern both cubic capacity and weight that can be loaded. A standard 20ft container can hold up to about 21.500 kilos of goods (24.000 kilos tare weight included) and has an average capacity of 30 cbm; there also certified containers that can hold up to about 27.500 kilos of goods (30.480 kilos tare weight included). A 40 ft container can generally squeeze about 60 cbm worth of goods inside and you can load 26.500 kilos of goods (30.460 kilos tare weight included).