British Thermal Units to Gigajoules Conversion

Enter the energy in british thermal units below to get the value converted to gigajoules.

Results in Gigajoules:
Loading content.
1 BTU = 1.0551E-6 GJ
Hint: use a scientific notation calculator to convert E notation to decimal

How to Convert British Thermal Units to Gigajoules

To convert a british thermal unit measurement to a gigajoule measurement, multiply the energy by the conversion ratio.

Since one british thermal unit is equal to 1.0551E-6 gigajoules, you can use this simple formula to convert:

gigajoules = british thermal units × 1.0551E-6

The energy in gigajoules is equal to the british thermal units multiplied by 1.0551E-6.

For example, here's how to convert 500,000 british thermal units to gigajoules using the formula above.
500,000 BTU = (500,000 × 1.0551E-6) = 0.527528 GJ

British thermal units and gigajoules are both units used to measure energy. Keep reading to learn more about each unit of measure.

British Thermal Units

British thermal units are a measure of heat energy. Specifically, one british thermal unit is equal to the amount of heat energy required to increase the temperature of one pound of water one degree Fahrenheit. They are often used as a way to rate the energy heat producing appliances such furnaces, and to price heating fuels such as natural gas.

The british thermal unit is a US customary unit of energy. British thermal units can be abbreviated as BTU; for example, 1 british thermal unit can be written as 1 BTU.


One gigajoule is equal to 1,000,000,000 joules, which are the energy equal to the force on an object of one newton at a distance of one meter.

The gigajoule is a multiple of the joule, which is the SI derived unit for energy. In the metric system, "giga" is the prefix for 109. Gigajoules can be abbreviated as GJ; for example, 1 gigajoule can be written as 1 GJ.

British Thermal Unit to Gigajoule Conversion Table

British thermal unit measurements converted to gigajoules
British Thermal Units Gigajoules
1 BTU 0.0000010551 GJ
2 BTU 0.0000021101 GJ
3 BTU 0.0000031652 GJ
4 BTU 0.0000042202 GJ
5 BTU 0.0000052753 GJ
6 BTU 0.0000063303 GJ
7 BTU 0.0000073854 GJ
8 BTU 0.0000084404 GJ
9 BTU 0.0000094955 GJ
10 BTU 0.000010551 GJ
100 BTU 0.000106 GJ
1,000 BTU 0.001055 GJ
10,000 BTU 0.010551 GJ
100,000 BTU 0.105506 GJ
1,000,000 BTU 1.0551 GJ

More British Thermal Unit & Gigajoule Conversions