1 Therm equals exactly
100.000 BTU
The Therm is defined exactly as 100,000 BTU (British Thermal Unit), both thermal units of the British/American imperial system. This is one of the simplest energy conversions, since the factor is a round number by definition.
To convert a measurement from Therms to BTU, simply multiply the value by 100,000:
To convert from BTU to Therms, perform the inverse operation, dividing by 100,000:
This conversion is useful for those working with technical specifications of gas systems or boilers, where thermal power may be expressed in either Therms or BTU/h depending on the document source, and being able to quickly switch between units matters.