Kilowatt-hours to Kilojoules Converter

To convert a measurement in kilowatt-hours to kilojoules, multiply the value by 3,600. The conversion factor comes from the relationship between both units and the joule.

For example, to convert 5 kWh to kilojoules: 5 × 3,600 = 18,000 kJ.

A kilowatt-hour equals 1,000 watt-hours, or 3.6 million joules, and is the standard unit for billing electrical energy. The kilowatt-hour became the universal unit of electricity metering because it conveniently expresses household consumption. Running a 1,000-watt appliance for one hour uses exactly one kWh.

Common uses of kilowatt-hours include: Household electricity billing; Electric vehicle battery capacity; Home solar and battery systems; Energy audits and efficiency ratings.

A kilojoule equals 1,000 joules and is the standard metric unit for expressing food energy on nutrition labels in most of the world. As metric countries adopted SI units for food labeling, the kilojoule replaced the food calorie on packaging in regions such as Australia, New Zealand, and the European Union (shown alongside kcal).

Common uses of kilojoules include: Food energy on nutrition labels; Dietary and exercise energy tracking; Chemical reaction energy (enthalpy); Battery and mechanical energy specs.

Here are some common values converted:

1 kWh = 3,600 kJ 5 kWh = 18,000 kJ 10 kWh = 36,000 kJ 50 kWh = 180,000 kJ 100 kWh = 360,000 kJ