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