Therm to Gigajoule Converter

Energy Converter

27 units available

Decimals:

From

To

0.105506

1 thm = 0.105506 GJ

Formula:

GJ = thm × 0.1055055853

With your value: 1 thm = 0.10550559 GJ

How big is that?

Everyday references on a logarithmic scale, all expressed in therm so you can sanity-check the result.

Heartbeat (1/1.1e+8 your value)9.48e-9 thm

AA battery charge (1/1.1e+4 your value)0.0000948 thm

Slice of bread (1/3.8e+2 your value)0.00265 thm

Daily food intake (1/13 your value)0.0796 thm

Litre of petrol (1/3.1 your value)0.324 thm

Your value1.00 thm

Other Therm to Gigajoule conversions

2 thm to GJ 3 thm to GJ 4 thm to GJ 5 thm to GJ 6 thm to GJ 7 thm to GJ 8 thm to GJ

Therm to Gigajoule Conversion Table

Therm (thm)	Gigajoule (GJ)
0.5	0.052753
1	0.105506
2	0.211011
5	0.527528
10	1.055056
15	1.582584
20	2.110112
25	2.63764
50	5.275279
100	10.550559
250	26.376396
500	52.752793
1000	105.505585

Gigajoule to Therm Conversion Table

Gigajoule (GJ)	Therm (thm)
0.5	4.739086
1	9.478171
2	18.956342
5	47.390856
10	94.781712
15	142.172568
20	189.563424
25	236.95428
50	473.90856
100	947.81712
250	2,369.542801
500	4,739.085602
1000	9,478.171203

Where these values come from

Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.

Therm (thm)

Energy

Exact conversion

Derived from the joule (1 J = 1 kg·m²/s²). Thermochemical and IT calories, BTU and kWh are exact defined multiples.

Source: NIST Special Publication 811, Guide for the Use of the International System of Units

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

Gigajoule (GJ)

Energy

Exact conversion

Derived from the joule (1 J = 1 kg·m²/s²). Thermochemical and IT calories, BTU and kWh are exact defined multiples.

Source: NIST Special Publication 811, Guide for the Use of the International System of Units

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

How to Convert Therm to Gigajoule

To convert from Therm (thm) to Gigajoule (GJ), multiply the value by 0.1055055853.

Formula: GJ = thm × 0.1055055853

Reverse: thm = GJ × 9.4781712031

Step-by-Step Example

Start with your value in Therm. For example: 5 thm
Multiply by the conversion factor: 5 x 0.1055055853
The result is: 0.527528 GJ

About Therm

The therm (thm) is a unit of energy and work. One therm equals 1.055056 × 10^+8 joules. UnitConvertLab converts it against every other energy unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

Common uses: energy calculations, engineering and science, education.

About Gigajoule

The gigajoule (GJ) is a unit of energy and work. One gigajoule equals 1.000000 × 10^+9 joules. UnitConvertLab converts it against every other energy unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

Common uses: energy calculations, engineering and science, education.

Frequently Asked Questions

How many Gigajoule are in 1 Therm?

There are exactly 0.1055055853 Gigajoule in 1 Therm. This means the conversion factor from Therm to Gigajoule is 0.1055055853.

What is the formula to convert Therm to Gigajoule?

The formula to convert Therm to Gigajoule is: GJ = thm × 0.1055055853. For example, to convert 10 Therm to Gigajoule, you would multiply 10 by 0.1055055853.

What is a Therm?