Convert British thermal unit to Kilojoule

One BTU equals 1.05506 kJ. This converter allows you to easily convert between British thermal unit and Kilojoule in real time.

Formula

BTU × 1.05506 = kJ

Example: 1 BTU = 1.05506 kJ

What is British thermal unit?

The British thermal unit is the amount of energy needed to raise the temperature of one pound of water by one degree Fahrenheit. It is primarily used in the American HVAC industry, where air conditioner capacity is rated in BTU per hour (12,000 BTU/h equals one ton of refrigeration). Residential air conditioners typically range from 5,000 to 25,000 BTU/h. Natural gas is also traded in BTU, with one cubic foot containing about 1,000 BTU. One BTU equals approximately 1,055 joules.

What is Kilojoule?

The kilojoule equals 1,000 joules and is used for food energy labeling in Australia, New Zealand, and many other countries. A typical adult requires about 8,400 kJ (2,000 kcal) of food energy per day. In chemistry, enthalpy changes are commonly expressed in kJ per mole, and the heat of vaporization of water is approximately 2,257 kJ per kilogram.