Femtowatt-hours to therms (USA) equation
To convert femtowatt-hours to therms (USA):
Multiply the number of femtowatt-hours by 3.4129563407040554e-20
About femtowatt-hours
One femtowatt-hour is equal to a quadrillionth watt-hours
About therms (USA)
The definition of a therm differs globally — one USA therm is equal to 100,000 59 °F British thermal unit