Kilojoules to Kilowatt-hours Converter

To convert a measurement in kilojoules to kilowatt-hours, multiply the value by 0.000277777778. The conversion factor comes from the relationship between both units and the joule.

For example, to convert 5 kJ to kilowatt-hours: 5 × 0.000277777778 = 0.001388888889 kWh.

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.

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.

Here are some common values converted:

1 kJ = 0.000277777778 kWh 5 kJ = 0.001388888889 kWh 10 kJ = 0.002777777778 kWh 50 kJ = 0.013888888889 kWh 100 kJ = 0.027777777778 kWh