Megawatt-Hour to Megajoule Converter

Energy Converter

27 units available

Decimals:

From

To

3,600

1 MWh = 3,600 MJ

Formula:

MJ = MWh × 3,600

With your value: 1 MWh = 3,600 MJ

How big is that?

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

Heartbeat (1/3.6e+9 your value)2.78e-10 MWh

AA battery charge (1/3.6e+5 your value)0.00000278 MWh

Slice of bread (1/1.3e+4 your value)0.0000778 MWh

Daily food intake (1/4.3e+2 your value)0.00233 MWh

Litre of petrol (1/1.1e+2 your value)0.00950 MWh

Your value1.00 MWh

Other Megawatt-Hour to Megajoule conversions

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

Megawatt-Hour to Megajoule Conversion Table

Megawatt-Hour (MWh)	Megajoule (MJ)
0.5	1,800
1	3,600
2	7,200
5	18,000
10	36,000
15	54,000
20	72,000
25	90,000
50	180,000
100	360,000
250	900,000
500	1,800,000
1000	3,600,000

Megajoule to Megawatt-Hour Conversion Table

Megajoule (MJ)	Megawatt-Hour (MWh)
0.5	0.000139
1	0.000278
2	0.000556
5	0.001389
10	0.002778
15	0.004167
20	0.005556
25	0.006944
50	0.013889
100	0.027778
250	0.069444
500	0.138889
1000	0.277778

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.

Megawatt-Hour (MWh)

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

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

How to Convert Megawatt-Hour to Megajoule

To convert from Megawatt-Hour (MWh) to Megajoule (MJ), multiply the value by 3,600.

Formula: MJ = MWh × 3,600

Reverse: MWh = MJ × 0.0002777778

Step-by-Step Example

Start with your value in Megawatt-Hour. For example: 5 MWh
Multiply by the conversion factor: 5 x 3,600
The result is: 18,000 MJ

About Megawatt-Hour

The megawatt-hour (MWh) is a unit of energy and work. One megawatt-hour equals 3.600000 × 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 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.

Frequently Asked Questions

How many Megajoule are in 1 Megawatt-Hour?

There are exactly 3,600 Megajoule in 1 Megawatt-Hour. This means the conversion factor from Megawatt-Hour to Megajoule is 3,600.

What is the formula to convert Megawatt-Hour to Megajoule?

The formula to convert Megawatt-Hour to Megajoule is: MJ = MWh × 3,600. For example, to convert 10 Megawatt-Hour to Megajoule, you would multiply 10 by 3,600.

What is a Megawatt-Hour?