The result of your conversion between gram calorie and zettajoule appears here
To convert between Gram Calorie and Zettajoule you have to do the following:
First divide 4.1858 / 1.0e+21 = 0.
Then multiply the amount of Gram Calorie you want to convert to Zettajoule, use the chart below to guide you.
Symbol: g cal
No description
Symbol: zJ
No description