Convert joules to kilowatt hours and kWh to joules instantly. Bidirectional energy converter with formula and common values.
Divide the joule value by 3,600,000 to get kilowatt hours. The joule is the SI unit of energy, while the kilowatt hour is the standard unit for electrical energy consumption and billing.
| Joules | Kilowatt Hours |
|---|---|
| 360,000 | 0.1000 |
| 1,800,000 | 0.5000 |
| 3,600,000 | 1.0000 |
| 7,200,000 | 2.0000 |
| 18,000,000 | 5.0000 |
| 36,000,000 | 10.000 |
| 360,000,000 | 100.00 |
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One joule equals approximately 2.77778e-7 kilowatt hours. Joules are extremely small compared to kWh, which is why electricity is billed in kWh rather than joules.
Divide the number of joules by 3,600,000 (or multiply by 2.77778e-7). For example, 5,400,000 J ÷ 3,600,000 = 1.5 kWh.
A kilowatt hour is a much more practical unit for household energy. Running a 1,000-watt appliance for one hour uses 1 kWh, or 3.6 million joules. The joule count would be unwieldy on a utility bill.
A watt is one joule per second. A kilowatt hour equals 3,600,000 joules. So 1 kWh is the energy used by a 1-kilowatt device running for 3,600 seconds (one hour).