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Convert kwh to kj (Kilowatt-hours to Kilojoules)

Convert kwh to kj instantly (Kilowatt-hours to Kilojoules). 1 kWh = 3600 kJ.

Converter

kilowatt-hour (kWh)
kilojoule (kJ)

kWh to kJ conversion table

Kilowatt-hoursKilojoules
1 kWh3600 kJ
2 kWh7200 kJ
5 kWh18000 kJ
10 kWh36000 kJ
25 kWh90000 kJ
50 kWh180000 kJ
100 kWh360000 kJ
1000 kWh3600000 kJ

Formula

kJ = kWh × 3600

Worked example

25 kWh × 3600 = 90000 kJ

Popular conversion examples

Choose an example to open this converter with the value filled in. These are useful examples, not a claim about search rankings.

  • 1 kWh to kJ

    3600 kJ. Open the full kwh to kj converter.

    convertly.website/kwh-to-kj/?value=1
  • 5 kWh to kJ

    18000 kJ. Open the full kwh to kj converter.

    convertly.website/kwh-to-kj/?value=5
  • 100 kWh to kJ

    360000 kJ. Open the full kwh to kj converter.

    convertly.website/kwh-to-kj/?value=100
  • 0.12 kWh to kJ

    432 kJ. Open the full kwh to kj converter.

    convertly.website/kwh-to-kj/?value=0.12
  • 1 kJ to kWh

    0.000277778 kWh. Open the full kj to kwh converter.

    convertly.website/kj-to-kwh/?value=1
  • 3600 kJ to kWh

    1 kWh. Open the full kj to kwh converter.

    convertly.website/kj-to-kwh/?value=3600

About kilowatt-hours and kilojoules

Kilowatt-hour (kWh)

A kilowatt-hour is 1,000 watt-hours, exactly 3.6 megajoules. It is the unit on household electricity bills.

Kilojoule (kJ)

A kilojoule is 1,000 joules. It is used for food energy in many countries and for heat and work in engineering.

Both are units of energy; the base unit used internally is J.

Notes

kWh to kJ FAQs

How do I convert kilowatt-hours to kilojoules?

Multiply the number of kilowatt-hours by 3600 to get kilojoules. For example, 25 kWh × 3600 = 90000 kJ.

How many kilojoules are in one kilowatt-hour?

1 kWh = 3600 kJ and 1 kJ = 0.0002777777778 kWh. To go the other way, use the kilojoules to kilowatt-hours converter.

How many kilojoules are in 8 kilowatt-hours?

8 kWh = 28800 kJ, rounded to 6 significant digits. Change the value in the converter above for any other amount.

How many kilojoules are in 0.0003 kilowatt-hours?

0.0003 kWh = 1.08 kJ, rounded to 6 significant digits.

Is the kWh to kJ conversion exact?

Yes. The factor 3600 follows directly from the unit definitions (A kilowatt-hour is 1,000 watt-hours, exactly 3.6 megajoules; a kilojoule is 1,000 joules), so the only rounding is in the digits you choose to display.

What is the difference between kilowatt-hours and kilojoules?

A kilowatt-hour is 1,000 watt-hours, exactly 3.6 megajoules. It is the unit on household electricity bills. A kilojoule is 1,000 joules. It is used for food energy in many countries and for heat and work in engineering.

Is a kilowatt-hour the same as a kilowatt?

No. A kilowatt (kW) is a rate of using energy, while a kilowatt-hour (kWh) is an amount of energy. A 2 kW heater running for 3 hours uses 6 kWh, which is 21600 kJ.

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