Convert Joule to Kilowatt-hour
Live bidirectional calculator for Joules (J) and Kilowatt-hours (kWh) with verified formula and conversion charts.
Energy9 units
How the Calculation Works (Linear Scaling)
Since 1 Kilowatt-hour = 3600000 Joules, divide the value in Joules by 3600000.
Joule to Kilowatt-hour Conversion Table
Precomputed values for quick reference and printing.
| Joule | Kilowatt-hour |
|---|---|
| 1 J | 2.7778e-7 kWh |
| 2 J | 5.5556e-7 kWh |
| 3 J | 8.3333e-7 kWh |
| 4 J | 1.1111e-6 kWh |
| 5 J | 1.3889e-6 kWh |
| 6 J | 1.6667e-6 kWh |
| 7 J | 1.9444e-6 kWh |
| 8 J | 2.2222e-6 kWh |
| 9 J | 2.5e-6 kWh |
| 10 J | 2.7778e-6 kWh |
| 15 J | 4.1667e-6 kWh |
| 20 J | 5.5556e-6 kWh |
| 25 J | 6.9444e-6 kWh |
| 30 J | 8.3333e-6 kWh |
| 40 J | 1.1111e-5 kWh |
| 50 J | 1.3889e-5 kWh |
| 75 J | 2.0833e-5 kWh |
| 100 J | 2.7778e-5 kWh |
| Kilowatt-hour | Joule |
|---|---|
| 1 kWh | 3600000 J |
| 2 kWh | 7200000 J |
| 3 kWh | 10800000 J |
| 4 kWh | 14400000 J |
| 5 kWh | 18000000 J |
| 6 kWh | 21600000 J |
| 7 kWh | 25200000 J |
| 8 kWh | 28800000 J |
| 9 kWh | 32400000 J |
| 10 kWh | 36000000 J |
| 15 kWh | 54000000 J |
| 20 kWh | 72000000 J |
| 25 kWh | 90000000 J |
| 30 kWh | 108000000 J |
| 40 kWh | 144000000 J |
| 50 kWh | 180000000 J |
| 75 kWh | 270000000 J |
| 100 kWh | 360000000 J |
๐ Standard Benchmark Reference Values
Utility electrical billing standard (3.6 MJ).
Exact RatioAbout Joule (J)
The SI coherent derived unit of energy, equal to the work done by a force of one newton over a distance of one meter (1 Nยทm or 1 Wยทs).
History: Named in honor of English physicist James Prescott Joule for his experiments on the mechanical equivalent of heat.
Common Uses: Physics, mechanical work, kinetic energy, laser pulse energy.
About Kilowatt-hour (kWh)
One thousand watt-hours, equal to exactly 3,600,000 joules (3.6 megajoules).
History: Primary billing unit for consumer and industrial electrical energy worldwide.
Common Uses: Home electric utility bills, electric vehicle (EV) battery packs (e.g. 75 kWh), solar panel generation.
โ Frequently Asked Questions
How many Kilowatt-hours are in 1 Joule?
There are exactly 2.777778e-7 Kilowatt-hours in 1 Joule (1 J = 2.777778e-7 kWh).
What is the formula to convert Joule to Kilowatt-hour?
The formula is: Kilowatt-hour = Joule / 3600000. Since 1 Kilowatt-hour = 3600000 Joules, divide the value in Joules by 3600000.
How do I convert 1 J to kWh manually?
To convert 1 J to kWh: apply the formula Kilowatt-hour = Joule / 3600000. Substituting gives: 1 / 3600000 = 2.7778e-7 kWh.