BTU (IT) to Therms (US) Converter
Enter a value to instantly convert between energy units.
1 BTU (IT) = 0 Therm (US)
Key Formulas
Kilocalorie → Kilojoule
kJ = kcal × 4.184Kilojoule → Kilocalorie
kcal = kJ × 0.239006Kilowatt-Hour → Joule
J = kWh × 3600000Joule → Kilowatt-Hour
kWh = J × 2.77778e-7Formula
therms = BTU × 0.01One therm equals exactly 100,000 BTU by definition — this is a clean, fixed relationship. Gas utilities price in therms while equipment ratings often use BTU. Converting between them is simply moving the decimal point two places. This makes it easy to check gas bills or compare appliance inputs.
Source: NIST SP 811, Table B.8
Frequently Asked Questions
Real-World Examples
A homeowner checking their bill: 100 BTU = 1 therm, so this is a quick sanity check.
1 BTU = 0.01 thm
An HVAC engineer converting 1000 BTU/h furnace rating to therms per month for billing analysis.
1000 BTU = 10 thm
A gas company converting 10,000 BTU daily consumption for a commercial customer bill in therms.
10000 BTU = 100 thm
A property manager checking 50,000 BTU peak demand against a 500 therms monthly budget.
50000 BTU = 500 thm