Convert from tonelada [Portugal] to megatonne

Unit Definition (tonelada [Portugal])
The tonelada [Portugal] is a traditional weight unit of Portugal corresponding to the English and metric ton. The Portuguese tonelada, however, equals 1728 Portuguese libras or arratels; this is about 1748.6 pounds or 793.15 kilograms.

Unit Definition (megatonne)
The megatonne is a metric unit of mass or weight equal to one million metric tons (tonnes), one teragram (Tg), or about 2.2046 billion pounds.