Kilowatt-hour [kWh] to Kilojoule [kJ] Converter

Quick Reference

1 Kilowatt-hour (kWh) = 3600 Kilojoule (kJ)

1 Kilojoule (kJ) = 0.0002777777778 Kilowatt-hour (kWh)

How to Convert Kilowatt-hour to Kilojoule

1 kWh = 3600 kJ
1 kJ = 0.0002777777777777778 kWh

To convert Kilowatt-hour to Kilojoule, multiply the value by 3600. To convert Kilojoule back to Kilowatt-hour, divide by 3600.

Example: convert 10 kWh to kJ:
10 kWh = 10 x 3600 = 36000 kJ

↔ Convert Kilojoule to Kilowatt-hour

Kilowatt-hour

Definition: A kilowatt-hour (symbol kWh) is a unit of energy equal to one kilowatt (1,000 watts) of power sustained for one hour. It is a standard unit for measuring electrical energy consumption.

History/origin: The kilowatt-hour became widely adopted with the expansion of electrical grids and the need for a practical unit to measure household and industrial energy usage.

Current use: Kilowatt-hours are the standard unit used by utility companies to bill consumers for electricity usage. It's also used to specify the energy output of power plants and the energy consumption of large appliances.

Kilojoule

Definition: A kilojoule (symbol: kJ) is equal to 1000 joules. It's a unit of energy.

History/origin: Based on the joule, using the SI prefix 'kilo-' to denote a factor of one thousand.

Current use: Commonly used to express the energy content of food, fuels, and other substances when the joule would be impractically small. Also used in thermodynamics and other areas of physics and engineering.

Kilowatt-hour to Kilojoule Conversion Table

Kilowatt-hour [kWh]	Kilojoule [kJ]
1 kWh	3600 kJ
2 kWh	7200 kJ
5 kWh	18000 kJ
10 kWh	36000 kJ
20 kWh	72000 kJ
50 kWh	180000 kJ
100 kWh	360000 kJ
200 kWh	720000 kJ
500 kWh	1800000 kJ
1000 kWh	3600000 kJ

Common pairs of Energy

Watt-hour

Watt-hour to Milliwatt-hour Watt-hour to Kilowatt-hour Watt-hour to Megawatt-hour Watt-hour to Gigawatt-hour Watt-hour to Joule

Milliwatt-hour

Milliwatt-hour to Watt-hour Milliwatt-hour to Kilowatt-hour Milliwatt-hour to Megawatt-hour Milliwatt-hour to Gigawatt-hour Milliwatt-hour to Joule

Kilowatt-hour

Kilowatt-hour to Watt-hour Kilowatt-hour to Milliwatt-hour Kilowatt-hour to Megawatt-hour Kilowatt-hour to Gigawatt-hour Kilowatt-hour to Joule

Megawatt-hour

Megawatt-hour to Watt-hour Megawatt-hour to Milliwatt-hour Megawatt-hour to Kilowatt-hour Megawatt-hour to Gigawatt-hour Megawatt-hour to Joule

Gigawatt-hour

Gigawatt-hour to Watt-hour Gigawatt-hour to Milliwatt-hour Gigawatt-hour to Kilowatt-hour Gigawatt-hour to Megawatt-hour Gigawatt-hour to Joule

Joule

Joule to Watt-hour Joule to Milliwatt-hour Joule to Kilowatt-hour Joule to Megawatt-hour Joule to Gigawatt-hour

Kilojoule

Kilojoule to Watt-hour Kilojoule to Milliwatt-hour Kilojoule to Kilowatt-hour Kilojoule to Megawatt-hour Kilojoule to Gigawatt-hour

Kilowatt-hour [kWh] to Kilojoule [kJ] Converter

To convert Kilowatt-hour to Kilojoule, enter your value in the kWh field above and the result in kJ will appear instantly. You can also use the conversion factor shown in the table on this page to calculate manually. The formula is always the same: multiply your kWh value by the fixed conversion ratio to get the equivalent in kJ.

Our Kilowatt-hour to Kilojoule converter uses standardized conversion factors defined by international scientific and metrological organizations. All calculations are performed with full floating-point precision. You can also choose how many decimal places to display in the result, so you get exactly the level of detail you need.

Yes, absolutely. Simply swap the source and destination units in the converter — select kJ as your input unit and kWh as your output unit. The same precision and standardized conversion factor applies in both directions.

Converting between Kilowatt-hour and Kilojoule comes up regularly in engineering, scientific research, construction, and everyday tasks that involve measurements from different unit systems. Our converter eliminates the risk of manual calculation errors and saves time whenever you need to switch between these two units.

Yes, the Kilowatt-hour to Kilojoule converter is completely free. No account or registration is required, and there are no usage limits. It works on any device — smartphones, tablets, and desktop computers — directly in your browser.

Kilowatt-hour and Kilojoule are both units used to measure the same physical quantity, but they belong to different measurement systems or represent different scales. The mathematical relationship between them is fixed and constant, which is what makes accurate conversion possible. Scroll up to see the exact conversion factor, formula, and a reference table for common values.

Kilowatt-hour [kWh] to Kilojoule [kJ] Converter

Quick Reference

1 Kilowatt-hour (kWh) = 3600 Kilojoule (kJ)

1 Kilojoule (kJ) = 0.0002777777778 Kilowatt-hour (kWh)

How to Convert Kilowatt-hour to Kilojoule

1 kWh = 3600 kJ
1 kJ = 0.0002777777777777778 kWh

To convert Kilowatt-hour to Kilojoule, multiply the value by 3600. To convert Kilojoule back to Kilowatt-hour, divide by 3600.

Example: convert 10 kWh to kJ:
10 kWh = 10 x 3600 = 36000 kJ

↔ Convert Kilojoule to Kilowatt-hour

Kilowatt-hour

Definition: A kilowatt-hour (symbol kWh) is a unit of energy equal to one kilowatt (1,000 watts) of power sustained for one hour. It is a standard unit for measuring electrical energy consumption.

History/origin: The kilowatt-hour became widely adopted with the expansion of electrical grids and the need for a practical unit to measure household and industrial energy usage.