Kilojoules (kJ) to calories (cal), energy conversion calculator and how to convert. Enter a value in either box above, and we'll convert it. 7000 kilojoules is 1672 calories. What is 7,000 kilojoules in calories? 7,000 kJ to cal conversion. 7000 kJ to Calories to convert 7000 kilojoules to calories and vice versa. More information from the unit converter.