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