Megajoule to Hartree Converter

Energy Converter

27 units available

Decimals:

From

To

2.293712e+23

1 MJ = 2.293712e+23 Eh

Formula:

Eh = MJ × 2.293712e+23

With your value: 1 MJ = 2.293712e+23 Eh

How big is that?

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

Heartbeat (1/1.0e+6 your value)0.00000100 MJ

AA battery charge (1/1.0e+2 your value)0.0100 MJ

Slice of bread (1/3.6 your value)0.280 MJ

Your value1.00 MJ

Daily food intake (8.4× your value)8.40 MJ

Litre of petrol (34× your value)34.2 MJ

Other Megajoule to Hartree conversions

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

Megajoule to Hartree Conversion Table

Megajoule (MJ)	Hartree (Eh)
0.5	1.146856e+23
1	2.293712e+23
2	4.587425e+23
5	1.146856e+24
10	2.293712e+24
15	3.440568e+24
20	4.587425e+24
25	5.734281e+24
50	1.146856e+25
100	2.293712e+25
250	5.734281e+25
500	1.146856e+26
1000	2.293712e+26

Hartree to Megajoule Conversion Table

Hartree (Eh)	Megajoule (MJ)
0.5	2.179872e-24
1	4.359745e-24
2	8.719489e-24
5	2.179872e-23
10	4.359745e-23
15	6.539617e-23
20	8.719489e-23
25	1.089936e-22
50	2.179872e-22
100	4.359745e-22
250	1.089936e-21
500	2.179872e-21
1000	4.359745e-21

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.

Megajoule (MJ)

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 Megajoule to Hartree

To convert from Megajoule (MJ) to Hartree (Eh), multiply the value by 2.293712e+23.

Formula: Eh = MJ × 2.293712e+23

Reverse: MJ = Eh × 4.359745e-24

Step-by-Step Example

Start with your value in Megajoule. For example: 5 MJ
Multiply by the conversion factor: 5 x 2.293712e+23
The result is: 1.146856e+24 Eh

About Megajoule

The megajoule (MJ) is a unit of energy and work. One megajoule equals 1.000000 × 10^+6 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 Megajoule?

There are exactly 2.293712e+23 Hartree in 1 Megajoule. This means the conversion factor from Megajoule to Hartree is 2.293712e+23.

What is the formula to convert Megajoule to Hartree?

The formula to convert Megajoule to Hartree is: Eh = MJ × 2.293712e+23. For example, to convert 10 Megajoule to Hartree, you would multiply 10 by 2.293712e+23.

What is a Megajoule?