Terajoules to megacalories converter above calculates how many megacalories are in 'X' terajoules (where 'X' is the number of terajoules to convert to megacalories). In order to convert a value from terajoules to megacalories (from TJ to Mcal) just type the number of TJ to be converted to Mcal and then click on the 'convert' button.