Cubic feet de natural gas per minute to BTU (IT) per second conversion calculator shown above calculates how many BTU (IT) per second are in 'X' cubic feet de natural gas per minute (where 'X' is the number of cubic feet de natural gas per minute to convert to BTU (IT) per second). In order to convert a value from cubic feet de natural gas per minute to BTU (IT) per second type the number of cubic feet de natural gas per minute to be converted to BTU/s and then click on the 'convert' button.