Therms to femtowatt-hours equation
To convert therms to femtowatt-hours:
Multiply the number of therms by 29307222222222217000
About therms
One therm is 100,000 British thermal units (Btu) — however, the definition of Btu differs globally — the standard therm is based on the ISO definition of a Btu — it is used primarily in the EU.
About femtowatt-hours
One femtowatt-hour is equal to a quadrillionth watt-hours