The result of your conversion between gigajoule and kiloton/cubic yard [US] appears here
To convert between Gigajoule and Kiloton/cubic Yard [US] you have to do the following:
First divide 1.0e+09 / ((0.45359237*2000)*1000)/((0.0037854118/231)*1728*27) = 842.77747134
Then multiply the amount of Gigajoule you want to convert to Kiloton/cubic Yard [US], use the chart below to guide you.
Symbol: GJ
No description
Symbol: kt/yd³
No description