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