Therms (USA) to femtowatt-hours equation
To convert therms (USA) to femtowatt-hours:
Multiply the number of therms (USA) by 29300111111111107000
About therms (USA)
The definition of a therm differs globally — one USA therm is equal to 100,000 59 °F British thermal unit
About femtowatt-hours
One femtowatt-hour is equal to a quadrillionth watt-hours