Gigajoules to Celsius heat units (IT) conversion calculator above calculates how many Celsius heat units (IT) are in 'X' gigajoules (where 'X' is the number of gigajoules to convert to Celsius heat units (IT)). In order to convert a value from gigajoules to Celsius heat units (IT) (from GJ to CHU) type the number of GJ to be converted to CHU and then click on the 'convert' button.