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