Convert joule to kilowatt hour
Enter the value to convert from joule to kilowatt hour.
How to Convert Joule to Kilowatt hour
Converting joule to kilowatt hour is straightforward using our conversion calculator.
Conversion Formula
kWh = J ÷ 3600000Reverse conversion: Convert kwh to joules
Comparison: Joule vs Kilowatt-hour
When to Use Each Unit
Joule: Universal scientific unit for all forms of energy: mechanical, electrical, thermal, chemical, and nuclear energy worldwide.
Kilowatt-hour: Universal standard for electrical energy billing, power plant output, and electrical energy measurements.
Common Conversion Values
- 1000 J = 1 kJ
- 1 J ≈ 0.239 cal
- 3,600,000 J = 1 kWh
- 1 J ≈ 0.738 ft⋅lbf
About Joule
Definition: The joule (symbol: J) is the SI unit of energy, equal to the energy expended when applying one newton of force through one meter of distance.
History: Named after English physicist James Prescott Joule in 1889. Established the mechanical equivalent of heat and energy conservation.
Current Use: Universal scientific unit for all forms of energy: mechanical, electrical, thermal, chemical, and nuclear energy worldwide.
Examples: Apple: 350,000 J, car battery: 4.3 MJ, lightning bolt: 1-5 billion J, human daily intake: 8-10 MJ
About Kilowatt
Definition: The kilowatt hour (symbol: kWh) is the energy consumed by using one kilowatt of power for one hour.
History: Developed with electrical power systems for billing and measuring electrical energy consumption in practical units.
Current Use: Universal standard for electrical energy billing, power plant output, and electrical energy measurements.
Examples: Home daily use: 10-30 kWh, electric car: 0.3 kWh/mile, LED bulb: 0.01 kWh/hour, washing machine: 2 kWh/load