Watts to liter-atmosphere per minute conversion calculator shown above calculates how many liter-atmosphere per minute are in 'X' watts (where 'X' is the number of watts to convert to liter-atmosphere per minute). In order to convert a value from watts to liter-atmosphere per minute (from W to L atm/min) simply type the number of W to be converted to L atm/min and then click on the 'convert' button.