The 747-8 Freighter will be 5.6 m (18.3 ft) longer than the 747-400 freighter. With a total payload capacity of 140 metric tonnes (154 tons), including tare weight, the 747-8F provides 16 percent more cargo revenue volume than the -400. The additional 117m³ (4,124 ft³) from the longer fuselage offers space for four additional main-deck pallets, two additional lower-hold pallets and two additional lower-hold containers.
Strewth! Better dust off those tipping charts Ratty!