Gigajoule to Hartree Converter

Energy Converter

27 units available

Decimals:

From

To

2.293712e+26

1 GJ = 2.293712e+26 Eh

Formula:

Eh = GJ × 2.293712e+26

With your value: 1 GJ = 2.293712e+26 Eh

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 Hartree conversions

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

Gigajoule to Hartree Conversion Table

Gigajoule (GJ)	Hartree (Eh)
0.5	1.146856e+26
1	2.293712e+26
2	4.587425e+26
5	1.146856e+27
10	2.293712e+27
15	3.440568e+27
20	4.587425e+27
25	5.734281e+27
50	1.146856e+28
100	2.293712e+28
250	5.734281e+28
500	1.146856e+29
1000	2.293712e+29

Hartree to Gigajoule Conversion Table

Hartree (Eh)	Gigajoule (GJ)
0.5	2.179872e-27
1	4.359745e-27
2	8.719489e-27
5	2.179872e-26
10	4.359745e-26
15	6.539617e-26
20	8.719489e-26
25	1.089936e-25
50	2.179872e-25
100	4.359745e-25
250	1.089936e-24
500	2.179872e-24
1000	4.359745e-24

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

Hartree (Eh)

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 Gigajoule to Hartree

To convert from Gigajoule (GJ) to Hartree (Eh), multiply the value by 2.293712e+26.

Formula: Eh = GJ × 2.293712e+26

Reverse: GJ = Eh × 4.359745e-27

Step-by-Step Example

Start with your value in Gigajoule. For example: 5 GJ
Multiply by the conversion factor: 5 x 2.293712e+26
The result is: 1.146856e+27 Eh

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 Hartree

The hartree (Eh) is a unit of energy and work. One hartree equals 4.359745 × 10^-18 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 Hartree are in 1 Gigajoule?

There are exactly 2.293712e+26 Hartree in 1 Gigajoule. This means the conversion factor from Gigajoule to Hartree is 2.293712e+26.

What is the formula to convert Gigajoule to Hartree?

The formula to convert Gigajoule to Hartree is: Eh = GJ × 2.293712e+26. For example, to convert 10 Gigajoule to Hartree, you would multiply 10 by 2.293712e+26.

What is a Gigajoule?