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