Convert kilowatt hours to joules and joules to kWh instantly. Bidirectional energy converter with formula and common values.
Multiply the kilowatt hour value by 3,600,000 to get joules. One kilowatt hour represents the energy delivered by a sustained power of one kilowatt over one hour.
| Kilowatt Hours | Joules |
|---|---|
| 0.25 | 900,000 |
| 0.5 | 1,800,000 |
| 1.5 | 5,400,000 |
| 3 | 10,800,000 |
| 5 | 18,000,000 |
| 8.5 | 30,600,000 |
| 25 | 90,000,000 |
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One kilowatt hour equals exactly 3,600,000 joules (3.6 MJ). This is because 1 kW = 1,000 J/s and one hour = 3,600 seconds.
Multiply the kWh value by 3,600,000. For example, 2.5 kWh × 3,600,000 = 9,000,000 J.
A kilowatt hour is a unit of energy, not power. Power (kilowatts) measures the rate of energy use, while kWh measures total energy consumed over time.
One kWh can power a 100-watt light bulb for about 10 hours, run a laptop for roughly 5-8 hours, or keep a refrigerator going for about 4 hours depending on the model.