Milliwatts to kilocalories per hour converter on this page calculates how many kilocalories per hour are in 'X' milliwatts (where 'X' is the number of milliwatts to convert to kilocalories per hour). In order to convert a value from milliwatts to kilocalories per hour (from mW to kcal/h) simply type the number of mW to be converted to kcal/h and then click on the 'convert' button.