This calculator allows you to convert from Fuel oil equivalent @barrel (US) to Kilowatt-second and in a reverse direction. To convert from Fuel oil equivalent @barrel (US) to Kilowatt-second, enter the amount of Fuel oil equivalent @barrel (US) into the first input and to convert from Kilowatt-second to Fuel oil equivalent @barrel (US), enter the amount of Kilowatt-second into the second input.