Gigajoule to BTU (th) Converter

Energy Converter

27 units available

Decimals:

From

To

948,451.652677

1 GJ = 948,451.652677 BTU

Formula:

BTU = GJ × 948,451.6526770049

With your value: 1 GJ = 948,451.65267701 BTU

How big is that?

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

Heartbeat (1/1.0e+9 your value)1.00e-9 GJ

AA battery charge (1/1.0e+5 your value)0.0000100 GJ

Slice of bread (1/3.6e+3 your value)0.000280 GJ

Daily food intake (1/1.2e+2 your value)0.00840 GJ

Litre of petrol (1/29 your value)0.0342 GJ

Your value1.00 GJ

Other Gigajoule to BTU (th) conversions

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

Gigajoule to BTU (th) Conversion Table

Gigajoule (GJ)	BTU (th) (BTU)
0.5	474,225.826339
1	948,451.652677
2	1,896,903.305354
5	4,742,258.263385
10	9,484,516.52677
15	14,226,774.790155
20	18,969,033.05354
25	23,711,291.316925
50	47,422,582.63385
100	94,845,165.267701
250	237,112,913.169251
500	474,225,826.338502
1000	948,451,652.677005

BTU (th) to Gigajoule Conversion Table

BTU (th) (BTU)	Gigajoule (GJ)
0.5	5.271750e-7
1	1.054350e-6
2	2.108700e-6
5	5.271750e-6
10	1.054350e-5
15	1.581525e-5
20	2.108700e-5
25	2.635875e-5
50	5.271750e-5
100	0.000105
250	0.000264
500	0.000527
1000	0.001054

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.

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

BTU (th) (BTU)

Energy

Exact conversion

The International Table BTU is exactly 1055.055 852 62 J.

Thermochemical and 39 °F BTU definitions differ by up to 0.2 %.

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 Gigajoule to BTU (th)

To convert from Gigajoule (GJ) to BTU (th) (BTU), multiply the value by 948,451.652677005.

Formula: BTU = GJ × 948,451.6526770049

Reverse: GJ = BTU × 0.0000010544

Step-by-Step Example

Start with your value in Gigajoule. For example: 5 GJ
Multiply by the conversion factor: 5 x 948,451.652677005
The result is: 4,742,258.263385 BTU

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.

About BTU (th)

The btu (th) (BTU) is a unit of energy and work. One btu (th) equals 1054.35 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 BTU (th) are in 1 Gigajoule?

There are exactly 948,451.652677005 BTU (th) in 1 Gigajoule. This means the conversion factor from Gigajoule to BTU (th) is 948,451.652677005.

What is the formula to convert Gigajoule to BTU (th)?

The formula to convert Gigajoule to BTU (th) is: BTU = GJ × 948,451.6526770049. For example, to convert 10 Gigajoule to BTU (th), you would multiply 10 by 948,451.652677005.

What is a Gigajoule?