Femtowatt-hours to gigajoules equation
To convert femtowatt-hours to gigajoules:
Multiply the number of femtowatt-hours by 3.600000000000001e-21
About femtowatt-hours
One femtowatt-hour is equal to a quadrillionth watt-hours
About gigajoules
One gigajoule is equal to a billion joules