Joules to Kilowatt-hours Conversion

Enter the energy in joules below to get the value converted to kilowatt-hours.

Results in Kilowatt-hours:
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1 J = 2.7778E-7 kWh
Hint: use a scientific notation calculator to convert E notation to decimal

How to Convert Joules to Kilowatt-hours

To convert a joule measurement to a kilowatt-hour measurement, divide the energy by the conversion ratio.

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

kilowatt-hours = joules ÷ 3,600,000

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

For example, here's how to convert 5,000,000 joules to kilowatt-hours using the formula above.
5,000,000 J = (5,000,000 ÷ 3,600,000) = 1.388889 kWh

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


The joule is the energy equal to the force on an object of one newton at a distance of one meter.[1] One joule is equal to the heat energy dissipated by the current of one ampere through one ohm of resistance for one second.

One joule is also equal to the energy needed to move an electric charge of one coulomb through a potential difference of one volt. In addition, one joule is also equal to the one watt-second.

The joule is the SI derived unit for energy in the metric system. Joules can be abbreviated as J; for example, 1 joule can be written as 1 J.


A kilowatt-hour is a measure of electrical energy equal to one kilowatt, or 1,000 watts, of power over a one hour period. Kilowatt-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.

Kilowatt-hours are usually abbreviated as kWh, although the formally adopted expression is kW·h. The abbreviation kW h is also sometimes used. For example, 1 kilowatt-hour can be written as 1 kWh, 1 kW·h, or 1 kW 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.[2]

Joule to Kilowatt-hour Conversion Table

Joule measurements converted to kilowatt-hours
Joules Kilowatt-hours
1 J 0.00000027778 kWh
2 J 0.00000055556 kWh
3 J 0.00000083333 kWh
4 J 0.0000011111 kWh
5 J 0.0000013889 kWh
6 J 0.0000016667 kWh
7 J 0.0000019444 kWh
8 J 0.0000022222 kWh
9 J 0.0000025 kWh
10 J 0.0000027778 kWh
100 J 0.000027778 kWh
1,000 J 0.000278 kWh
10,000 J 0.002778 kWh
100,000 J 0.027778 kWh
1,000,000 J 0.277778 kWh
10,000,000 J 2.7778 kWh


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

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