The result of your conversion between megaton [explosive] and gigajoule appears here
To convert between Megaton [explosive] and Gigajoule you have to do the following:
First divide 4.184e+15 / 1.0e+09 = 4184000.
Then multiply the amount of Megaton [explosive] you want to convert to Gigajoule, use the chart below to guide you.
Symbol: Mt
No description
Symbol: GJ
No description