British Thermal Unit

BTU

Energy to raise 1 lb water by 1°F

About British Thermal Unit (BTU)

The British Thermal Unit is the energy needed to raise one pound of water by one degree Fahrenheit. Despite being an imperial unit, the BTU remains standard in the US for rating HVAC systems (a typical home furnace produces 80,000-100,000 BTU/h) and for natural gas pricing.

Category
Energy
Symbol
BTU
Also known as
BTU BTUs british thermal unit british thermal units
01

CONVERT TO

Joule J Kilojoule kJ Megajoule MJ Calorie (thermochemical) cal Kilocalorie kcal Watt-hour Wh Kilowatt-hour kWh Electronvolt eV Therm thm Foot-pound ft·lbf

Frequently Asked Questions

What is a British Thermal Unit (BTU)?

Energy to raise 1 lb water by 1°F

How many Joule (J) are in one British Thermal Unit (BTU)?

One British Thermal Unit (BTU) equals 1,055.06 Joule (J).

How many Kilojoule (kJ) are in one British Thermal Unit (BTU)?

One British Thermal Unit (BTU) equals 1.0551 Kilojoule (kJ).

How many Megajoule (MJ) are in one British Thermal Unit (BTU)?

One British Thermal Unit (BTU) equals 0.0010550559 Megajoule (MJ).

How do I convert British Thermal Unit to Joule?

To convert British Thermal Unit to Joule, multiply the value by 1,055.06 (1 BTU = 1,055.06 J).