Femtowatt-hours to ronnawatt-hours equation
To convert femtowatt-hours to ronnawatt-hours:
Multiply the number of femtowatt-hours by 1e-42
About femtowatt-hours
One femtowatt-hour is equal to a quadrillionth watt-hours
About ronnawatt-hours
One ronnawatt-hour is equal to a octillion watt-hours