Terawatts to kilocalories per hour conversion calculator shown above calculates how many kilocalories per hour are in 'X' terawatts (where 'X' is the number of terawatts to convert to kilocalories per hour). In order to convert a value from terawatts to kilocalories per hour (from TW to kcal/h) type the number of TW to be converted to kcal/h and then click on the 'convert' button.