BTU (IT) per second to tons of air conditioning conversion calculator shown above calculates how many tons of air conditioning are in 'X' BTU (IT) per second (where 'X' is the number of BTU (IT) per second to convert to tons of air conditioning). In order to convert a value from BTU (IT) per second to tons of air conditioning simply type the number of BTU/s to be converted to tons of air conditioning and then click on the 'convert' button.