Joule to Megawatt-Hour Converter

Energy Converter

27 units available

Decimals:

From

To

2.777778e-10

1 J = 2.777778e-10 MWh

Formula:

MWh = J × 2.777778e-10

With your value: 1 J = 2.777778e-10 MWh

How big is that?

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

Heartbeat (1.0× your value)1.00 J

Your value1.00 J

AA battery charge (1.0e+4× your value)1.00e+4 J

Slice of bread (2.8e+5× your value)2.80e+5 J

Daily food intake (8.4e+6× your value)8.40e+6 J

Litre of petrol (3.4e+7× your value)3.42e+7 J

Other Joule to Megawatt-Hour conversions

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

Joule to Megawatt-Hour Conversion Table

Joule (J)	Megawatt-Hour (MWh)
0.5	1.388889e-10
1	2.777778e-10
2	5.555556e-10
5	1.388889e-9
10	2.777778e-9
15	4.166667e-9
20	5.555556e-9
25	6.944444e-9
50	1.388889e-8
100	2.777778e-8
250	6.944444e-8
500	1.388889e-7
1000	2.777778e-7

Megawatt-Hour to Joule Conversion Table

Megawatt-Hour (MWh)	Joule (J)
0.5	1,800,000,000
1	3,600,000,000
2	7,200,000,000
5	18,000,000,000
10	36,000,000,000
15	54,000,000,000
20	72,000,000,000
25	90,000,000,000
50	180,000,000,000
100	360,000,000,000
250	900,000,000,000
500	1.800000e+12
1000	3.600000e+12

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.

Joule (J)

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

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

How to Convert Joule to Megawatt-Hour

To convert from Joule (J) to Megawatt-Hour (MWh), multiply the value by 2.777778e-10.

Formula: MWh = J × 2.777778e-10

Reverse: J = MWh × 3.600000e+9

Step-by-Step Example

Start with your value in Joule. For example: 5 J
Multiply by the conversion factor: 5 x 2.777778e-10
The result is: 1.388889e-9 MWh

About Joule

The joule is the SI unit of energy. One joule equals the work done when a force of one newton moves an object one meter.

Common uses: physics, electrical engineering, chemistry.

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.

Frequently Asked Questions

How many Megawatt-Hour are in 1 Joule?

There are exactly 2.777778e-10 Megawatt-Hour in 1 Joule. This means the conversion factor from Joule to Megawatt-Hour is 2.777778e-10.

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

The formula to convert Joule to Megawatt-Hour is: MWh = J × 2.777778e-10. For example, to convert 10 Joule to Megawatt-Hour, you would multiply 10 by 2.777778e-10.

What is a Joule?