BTU (IT) per minute to milliwatts converter above calculates how many milliwatts are in 'X' BTU (IT) per minute (where 'X' is the number of BTU (IT) per minute to convert to milliwatts). In order to convert a value from BTU (IT) per minute to milliwatts (from BTU/min to mW) simply type the number of BTU/min to be converted to mW and then click on the 'convert' button.