Convert from gigatonne to quarter [US]

Unit Definition (gigatonne)
The gigatonne is a metric unit of mass or weight equal to one billion metric tons (tonnes) or about 2.2046 trillion pounds. This very large unit is used, for example, in discussing the amounts of carbon added to the atmosphere by human activities.

Unit Definition (quarter [US])
The quarter [US] is a traditional unit of weight equal to 1/4 hundredweight. In the United States, one quarter equals 25 pounds (11.3398 kilograms).