Microwatts to kilocalories per day converter above calculates how many kilocalories per day are in 'X' microwatts (where 'X' is the number of microwatts to convert to kilocalories per day). In order to convert a value from microwatts to kilocalories per day (from μW to kcal/d) simply type the number of μW to be converted to kcal/d and then click on the 'convert' button.