BTU (IT) per minute to calories per second converter on this page calculates how many calories per second are in 'X' BTU (IT) per minute (where 'X' is the number of BTU (IT) per minute to convert to calories per second). In order to convert a value from BTU (IT) per minute to calories per second (from BTU/min to cal/s) just type the number of BTU/min to be converted to cal/s and then click on the 'convert' button.