Kilojoules to Megawatt-hours Conversion

Enter the energy in kilojoules below to get the value converted to megawatt-hours.

Results in Megawatt-hours:
Loading content.
1 kJ = 2.7778E-7 MWh
Hint: use a scientific notation calculator to convert E notation to decimal

How to Convert Kilojoules to Megawatt-hours

To convert a kilojoule measurement to a megawatt-hour measurement, divide the energy by the conversion ratio.

Since one megawatt-hour is equal to 3,600,000 kilojoules, you can use this simple formula to convert:

megawatt-hours = kilojoules ÷ 3,600,000

The energy in megawatt-hours is equal to the kilojoules divided by 3,600,000.

For example, here's how to convert 5,000,000 kilojoules to megawatt-hours using the formula above.
5,000,000 kJ = (5,000,000 ÷ 3,600,000) = 1.388889 MWh

Kilojoules and megawatt-hours are both units used to measure energy. Keep reading to learn more about each unit of measure.


One kilojoule is equal to 1,000 joules, which are the energy equal to the force on an object of one newton at a distance of one meter.

The kilojoule is a multiple of the joule, which is the SI derived unit for energy. In the metric system, "kilo" is the prefix for 103. Kilojoules can be abbreviated as kJ; for example, 1 kilojoule can be written as 1 kJ.


A megawatt-hour is a measure of electrical energy equal to one megawatt, or 1,000,000 watts, of power over a one hour period. Megawatt-hours are a measure of electrical work performed over a period of time, and are often used as a way of measuring energy usage by electric companies.

Megawatt-hours are usually abbreviated as MWh, although the formally adopted expression is MW·h. The abbreviation MW h is also sometimes used. For example, 1 megawatt-hour can be written as 1 MWh, 1 MW·h, or 1 MW h.

In formal expressions, the centered dot (·) or space is used to separate units used to indicate multiplication in an expression and to avoid conflicting prefixes being misinterpreted as a unit symbol.[1]

Kilojoule to Megawatt-hour Conversion Table

Kilojoule measurements converted to megawatt-hours
Kilojoules Megawatt-hours
1 kJ 0.00000027778 MWh
2 kJ 0.00000055556 MWh
3 kJ 0.00000083333 MWh
4 kJ 0.0000011111 MWh
5 kJ 0.0000013889 MWh
6 kJ 0.0000016667 MWh
7 kJ 0.0000019444 MWh
8 kJ 0.0000022222 MWh
9 kJ 0.0000025 MWh
10 kJ 0.0000027778 MWh
100 kJ 0.000027778 MWh
1,000 kJ 0.000278 MWh
10,000 kJ 0.002778 MWh
100,000 kJ 0.027778 MWh
1,000,000 kJ 0.277778 MWh
10,000,000 kJ 2.7778 MWh


  1. Bureau International des Poids et Mesures, The International System of Units (SI), 9th edition, 2019,

More Kilojoule & Megawatt-hour Conversions