Convert BTU to GJ

Conversion Calculator

Enter your value in the conversion calculator below.

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How to convert BTU to GJ: Enter a value in the BTU field and click on the "Calculate GJ" button. Your answer will appear in the GJ field.

Conversion Definitions

The following is a list of definitions relating to conversions between BTU and gigajoules.

What is a British Thermal Unit (BTU)?

A British Thermal Unit is a unit of energy in the Imperial System. The symbol for British Thermal Unit is BTU or Btu. There are 947,817.12 BTU in a gigajoule. A BTU is measured as the quantity of heat required to raise the temperature of 1 pound of water by 1°F.

What is a gigajoule (GJ)?

A gigajoule is a unit of energy in the International System of Units (SI). The symbol for gigajoule is GJ. There are 0.00000105505585262 gigajoules in a BTU.

Conversion Formula

Let's take a closer look at the conversion formula so that you can do these conversions yourself with a calculator or with an old-fashioned pencil and paper.

The formula to convert from BTU to GJ is:

GJ = BTU x 0.00000105505585262

Conversion Example

Next, let's look at an example showing the work and calculations that are involved in converting from British Thermal Units to gigajoules (BTU to GJ).

BTU to Gigajoule Conversion Example

Task: Convert 375,000 BTUs to gigajoules (show work)

Formula:
BTU x 0.00000105505585262 = GJ

Calculations:
375,000 BTU x 0.00000105505585262 = 0.39564594 GJ

Result:
375,000 BTU is equal to 0.39564594 GJ

Conversion Table

For quick reference purposes, below is a conversion table that you can use to convert from BTUs to gigajoules.

BTUs to Gigajoules Conversion Chart

British Thermal Units (BTU)	gigajoules (GJ)
1 BTU	0.00000106 GJ
2 BTU	0.00000211 GJ
3 BTU	0.00000317 GJ
4 BTU	0.00000422 GJ
5 BTU	0.00000528 GJ
6 BTU	0.00000633 GJ
7 BTU	0.00000739 GJ
8 BTU	0.00000844 GJ
9 BTU	0.0000095 GJ
10 BTU	0.00001055 GJ
20 BTU	0.0000211 GJ
30 BTU	0.00003165 GJ
40 BTU	0.0000422 GJ
50 BTU	0.00005275 GJ
75 BTU	0.00007913 GJ
100 BTU	0.00010551 GJ
250 BTU	0.00026376 GJ
500 BTU	0.00052753 GJ
750 BTU	0.00079129 GJ
1,000 BTU	0.00105506 GJ
2,500 BTU	0.00263764 GJ
5,000 BTU	0.00527528 GJ
7,500 BTU	0.00791292 GJ
10,000 BTU	0.01055056 GJ
25,000 BTU	0.0263764 GJ
50,000 BTU	0.05275279 GJ
75,000 BTU	0.07912919 GJ
100,000 BTU	0.10550559 GJ
250,000 BTU	0.26376396 GJ

Related Units

This table provides a summary of the Energy units within their respective measurement systems.

Unit	Symbol	Measurement System	Description
calories (thermochemical)	cal	International System of Units (SI)	1 cal = 4.184 J
kilocalories	kcal	International System of Units (SI)	1,000 cal = 1 kcal
British Thermal Unit	BTU or Btu	Imperial System	1 BTU = 1,055 J
joules	J	International System of Units (SI)	base unit
kilojoules	kJ	International System of Units (SI)	1,000 J = 1 kJ
megajoules	MJ	International System of Units (SI)	1,000,000 J = 1 MJ
gigajoules	GJ	International System of Units (SI)	1,000,000,000 J = 1 GJ
terajoules	TJ	International System of Units (SI)	1,000,000,000,000 J = 1 TJ

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