The Unit Converters

BTU to Kilojoule

1 BTU = 1.05506 Kilojoule


Conversion Formula

To convert BTU to Kilojoule, multiply the value by 1.05506.

BTU × 1.05506 = Kilojoule

Quick Reference

BTU kJ
1 1.05506
5 5.2753
10 10.5506
25 26.3765
50 52.753
100 105.506
500 527.53
1000 1055.06

What is BTU?

The British thermal unit (symbol: BTU) is a traditional unit of heat in the imperial system.

It is defined as the amount of heat required to raise the temperature of one pound of water by one degree Fahrenheit.

Common Uses

BTUs are commonly used in the United States and the United Kingdom to measure the heating and cooling capacity of air conditioners, furnaces, and other HVAC systems.

What is Kilojoule?

The kilojoule (symbol: kJ) is a decimal multiple of the joule, the SI unit of energy.

One kilojoule is equal to 1,000 joules.

Common Uses

Kilojoules are commonly used to express the energy content of foods (as an alternative to calories) and in many engineering and industrial contexts to measure larger amounts of energy.

How many kilojoule are in a btu?

There are 1.05506 kilojoule in 1 btu.


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